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Found 16 results

  1. Hi all! I have a question for a new build. Motherboard: MSI B460M PRO CPU: Intel Core i5-10600 I have found as an offer, the Corsair Vengeance LPX 3000MHz 8GB (2 x 4GB) CMK8GX4M2C3000C16 memory modules. The CPU's normal speed is 2666MHz for RAM. Therefore, my question is, can I use these 3000MHz modules with this morherboard and make them automatically (via a simple setting such as XMP) to run at 2666MHz? I do not want to overclock anything or to change manually the frequency and timings... Thank you.
  2. Hello, I have an almost 4-year-old Corsair Vengeance LPX DDR 4 32G (2x16) 3200. Till recently I saw my computer is using the whole 32GB, however, I noticed that now I only see 16GB of RAM. (15.9GB to be exect) In the BIOS I see only 16384mb. In Task Manager I see in the top 32GB, but only 16GB in use. Both 2 slots are in use. In device specifications/ I see 32GB installed but only 15.9GB in use. I tried reseating and changing slots but it didn't help. Strange thing is that when I try to boot with only one stick instead 2 things happen: 1st stick - the computer goes into power-saving mode and shuts down. 2nd stick - nothing boots, just all the fans speed up and get very loud, but that's it. I have AMD Ryzen 7 1700x and Asus Prime x370-pro. Thank you.
  3. Hi, I recently ordered a new set of Vengeance LPX memory, 2 x 8GB - 16GB, and it is rated for 3200Mhz. I checked with my motherboards overclocking capabilities and it is rated up to 3200MHz, however when I set my DRAM-Frequency to DDR4-3200Mhz in my BIOS and checked both Task Manager and CPU-Z neither showed any increase to the speed.
  4. So I bought CMK16GX4M2D3600C18 RAM over a month ago now and my friend knew I was building a computer and bought me ram too for my birthday thinking it would put me at 32 GB. However the problem is I don't know if I can mix these two, and I can't return my 3600 MHz and I think my friend can't return the 3200 MHz anymore because the store only offered 14 days return time and he bought it pretty prematurely. Does anyone know if these two are likely to not run together?:[pouts:
  5. Hi for a while now I have had two different types of ram installed, 16gb(2x8) of vengeance LPX 3200mhz and 16gb(2x8) of Vengeance RGB Pro 3000mhz. I was having some problems and got a blue screen when trying to get them to run at 3200mhz so I took out the RGB Pro sticks and now everything is running fine and at 3200mhz. My question is which sticks should I use out of the two options since I can't use them both. Are the RGB Pro better than the LPX and if so would it be worth it to use them since they run at a slower speed and would I feel a difference between 3200mhz and 3000mhz? Thanks in advance.
  6. So on Cyber Monday I bought what was supposed to be another kit of ram identical to the one I already had. What I already had was Corsair Vengeance LPX 3000MHz with CAS Latency 16 using a Micron B-die, I have bought another kit with it advertised as being the same with CAS 16 from amazon with even the serial code on the packet being for the CMK16GX4M2D3000C16 which is what I had but looking on CPU-Z and another program the new RAM actually has a part number CMK16GX4M2B3000C15 which is the CAS 15 variant using the Hynix A-die, so I was sent the wrong product, I want to overclock my RAM and currently have it running at 3200MHz but I now cannot use any timing calculators to get "safe" timings because the different types have different timings. Using a calculator the Hynix CAS 15 one has lower timings so should I be fine using the timings from the Micron CAS 16 one since it is higher or would it not work?
  7. Hi, I am building a ryzen 1200 system with asrock AB350 Pro 4 mobo & currently planning on buying corsair ram. I have come across a recently released corsair vengeance lpx 3200MHz model with part number CMK8GX4M1E3200C16 on some shopping websites in my country but I am unable to find it on corsair website. As such I am unsure about claims regarding its ryzen compatibility & timings on the shopping sites. Please confirm the above & give an official product description link for the above mentioned model.
  8. Hi, I've just bought the kit above. I've looked up its spec on the product site, but could not find it CM = Corsair Memory 32G = 32GB X4 = DDR4 M2 = 2 modules in kit L = Revision 3000 = frequency C15 = latency the problem is now that there seems to be no revision L, I only found A or B but not L -> is this something undocumented or even a product fake ? Has anybody run into the same issue ? Many thanks
  9. IntroductionWith Intel’s 6th Generation Core processors – code-named Skylake – now out in the wild, we have an opportunity to directly compare DDR3 technology against DDR4. On paper, DDR4 is certainly more exciting: DDR3L offerings for Skylake stop at 2133MHz, while DDR4’s clock ceiling just keeps rising. The question now isn’t just whether or not DDR4 offers an appreciable improvement over DDR3L for Skylake users, but whether it’s price-performance competitive. Comparing Price Points The modern memory minimum for enthusiasts and gamers is really 16GB. 8GB is fine for most games, but there are newer games that have issues with that low amount, and more are expected to emerge. Dual 8GB DIMMs tend to be the best for price and for performance, so let’s compare how expensive our Vengeance DDR3L kits are to our Vengeance LPX DDR4 kits. DDR3L Price Point DDR4 16GB 1600 MHz $85 $90 16GB 1866 MHz $95 16GB 2133, 2400, 2666 MHz $100 16GB 2133 MHz $120 16GB 3000 MHz DDR3L is still our low price leader, but DDR4 is already extremely price competitive, and when we look at price-performance you’re going to see why most vendors are treating Skylake’s DDR3L support essentially as “legacy.” Also, remember that DDR3L is functionally identical to DDR3, it simply runs at a lower voltage. Testing Configuration We used the following system configuration to test performance: CPU: Intel Core i7-6700K @ 4.6GHz Motherboard: DDR3L: ASUS Z170-P D3 DDR4: ASUS Z170-DELUXE DRAM: DDR3L: 4x8GB Corsair Vengeance Pro DDR3L-2133 DDR4: 4x8GB Corsair Dominator Platinum DDR4-2800 Graphics Card: NVIDIA GeForce GTX 980 Storage: 480GB Corsair Force GT SSD CPU Cooler: Corsair Hydro Series H110i GT Power Supply: Corsair AX1200i Enclosure: Corsair Carbide Series Air 540 We then used these kits to test scaling down to 1600MHz C9 on the DDR3L and down to JEDEC (2133MHz C15) for DDR4. Overall Performance First, we’ll look at synthetic memory bandwidth tests just to get a feel for how the technology compares on a one-to-one. Raw memory read/write bandwidth is ever so slightly lower on DDR4 than it is on DDR3 at the same speed, but try to remember that DDR3’s entry level is actually 1600MHz. The real question and concern most users have when it comes to DDR4 is the higher latency, but as it turns out, this isn’t a very significant issue. DDR3-1600 has higher latency than any DDR4 on the market, while DDR3-2133’s latency is only marginally lower than DDR4-2400. Right away I’ll say that in practical game testing – including testing with the integrated graphics – Skylake just doesn’t seem to benefit substantially from faster memory. This may change with DirectX 12, but modern games seem to be more capacity intensive than speed intensive. However, for any kind of multimedia work, memory speed becomes much more relevant. Unless you’re running DDR3-2133, DDR4 is going to be consistently faster across the board, although its advantage does wane fairly early on. The difference isn’t staggering, but it’s measurable. The same trend occurs with Adobe Premiere CC and Adobe Media Encoder, though more pronounced. DDR3-1600 is just too slow for Skylake and leaves significant performance on the table. Finally, our baseline for the price-performance metric. PCMark 8’s Adobe Suite is consistently faster on DDR4 and continues to scale up gradually with each speed grade. The crux is that there’s a very modest performance delta between DDR3-2133 and DDR4-2133, but it’s negligible and easily remedied by just going up a single speed grade on DDR4. Price-to-Performance Now that DDR4 has hit essentially mainstream pricing, DDR3L’s price advantage has become negligible. At the time of this writing, 16GB of DDR4-2666 can be had for the same price as 16GB of DDR3L-1866, and the same amount of DDR4-3000 can actually be had for less than the same amount of DDR3L-2133. While higher speed memory tends to be less of a value than lower speed – that’s just been historically true – it’s worth noting that DDR4 gives you more performance-per-dollar over any DDR3 speed grade except for 1600MHz. And the flipside of DDR3-1600 is, as you saw earlier, a notable performance hit. Conclusion We’ll be continuing to test DDR4 against modern games as they come out, but regardless of performance scaling in games, DDR4 ends up being faster in virtually any other task than DDR3 and is a better price performer than the DDR3L needed to run Skylake. Users building new rigs with Skylake CPUs should really only be considering DDR4 and the associated boards.
  10. Intel’s 6th Generation Core processors and platform, known to most of the enthusiast community as “Skylake,” are en route. These new processors bring about a new microarchitecture and are manufactured on Intel’s cutting edge 14nm process, but they also need new chipsets and new memory. We’re ready over here at Corsair, but are you? The 6th Generation Core Memory Controller These new processors support both DDR4 and DDR3L natively, but there are caveats. While you’re likely to see motherboards come out that support both standards, DDR3L development has been deprecated. Most vendors are focusing on DDR4, which lets the new processors stretch their legs. Our existing 4-up DDR4 kits should run on the new platform without issue; they may actually even run a little better for the overclockers in the house, since these processors run on a dual-channel memory controller instead of the quad-channel one found in the Core i7-5960X and related chips. That said, the XMP 2.0 profiles for those kits were designed for Haswell-E and may necessitate having timings entered into BIOS manually. Existing 4-up Vengeance LPX kits should have no trouble running on the new platform. Users who want to bring their existing performance DDR3 to Skylake are going to have a much tougher time, though. Because the new memory controller only supports DDR3L at 1.35V and 1.5V (XMS) speeds, the 1.65V required to get DDR3 to hit high speeds rules them out. Some vendors are working on making their DDR3L-based Intel 100 Series boards compatible with existing 1.5V DDR3 kits, but expect these to be in the minority. Finally, only the new K-suffix chips will support DDR4 speeds beyond 2133 MHz. In order to run memory at higher than 2133 MHz on DDR4 or 1600 MHz on DDR3L, you’ll need to have a K-suffix chip and a motherboard with a Z170 chipset. What does all of this mean for you? Ultimately, if you want to jump to the new platform, it’s going to necessitate a new processor, new motherboard, and new memory. LGA 1151: Keeping Cooler Compatibility Intel’s new chips may necessitate a new socket, but they’ve done right by the enthusiast community by sticking with the same mounting system as their previous mainstream platforms. That means that any cooler that was compatible with LGA 1150, LGA 1155, or LGA 1156 will be compatible with the new LGA 1151. The shiny new Hydro Series H110i GTX mounts to the new processors using exactly the same hardware it needed on the old ones. Users with existing Hydro Series coolers have nothing to worry about; all of our coolers retain their compatibility with the new socket. So if you’re planning on upgrading, you can keep your cooler. Haswell-Ready Power Supplies and Sleep States Way back when the Intel Core i7-4770K and its kin first launched, there was some concern over power supply compatibility. Specifically, these processors added additional low power sleep states that could cause trouble with some power supplies. The new processors inherit these sleep states and the complications therein. Our new RMi series power supplies are just the ticket for delivering clean, stable power to the new chips while supporting all of their features. The overwhelming majority of our power supplies support these sleep states without issue. However, users with our entry-level CX (600W and below) and VS series power supplies will need to disable them in BIOS. Conclusion Intel’s new platform brings some big changes to the market. A faster architecture is always appreciated, but with the 6th Generation Core processors and 100 Series chipsets, they’re bringing a new memory standard into the mainstream in DDR4. We’ve already been playing with the new platform internally and we’re very optimistic about it: it’s fast, stable, and powerful, and the new memory controller brings healthy overclocking headroom. Performance users will be pleased, and we’ll be sharing more information soon, so stay tuned.
  11. It’s been a little while since we’ve hit you with a review roundup. We’re in the calm before the storm: in just a couple short weeks, CES 2015 will be upon us, and the industry will spin up to full tilt again. But for now, we still have a doozy of a review roundup for you. The Corsair Gaming umbrella continues to gain traction with the series of high quality peripherals being released under it, while reviews still trickle in for our HXi power supplies. Corsair Gaming H1500 and H2100 We’ll start with reviews of our USB-based gaming headset, the Corsair Gaming H1500. Guru3D, eTeknix, and Benchmark Reviews all gave it a listen, and every last one came away impressed. Guru3D’s Hilbert Hagedoorn said “The Corsair Gaming H1500 shines in a nice deep and dynamic sounding bass, clear voices, and the treble that we increased a notch totally fits my personal sound flavor. These factors combined satisfy my personal audio flavor real fast.” He gave it a Recommended award. While we’re at Guru3D, Hilbert also tried out our higher end wireless Corsair Gaming H2100 headset and gave it a Top Pick award, saying “For straight up gaming, the H2100 is tough to beat, the overall clarity and nice bass make it a killer headset.” The reviewer at eTeknix shared a similar sentiment before giving it the Editor’s Choice award: “The Corsair Gaming H1500 is one of the best mid-budget gaming headsets available. It’s lightweight and comfortable to use for long gaming sessions, it has powerful and clear audio and it also has one of the best microphones I’ve tested. A solid all-round performance from Corsair.” Finally, our friends at Benchmark Reviews called it “a lot of headset for the price” and “just what the doctor ordered for the budget gamer.” The H1500 walked away with their Golden Tachometer. Corsair Gaming Mice and Keyboards While I can’t technically say our keyboards are the best in the business, they have a habit of getting some pretty high accolades, and they’re being joined by our new RGB mice. We’ll start with Slashgear, which took a pretty comprehensive look at our RGB keyboards along with our M65 RGB mouse and came away smiling, saying: “We came for the colorful madness of the RGB hook, we stayed for the highest-end precision delivered in-game. Both the keyboard collection and the mouse usher in Corsair Gaming with a bang.” Next, Erik Fredriksen at TechnoBuffalo had this to say about our K70 RGB: “The customization options presented by the software put the K70 and its bigger and smaller siblings in a class of their own. If you want to do anything beyond simply typing, not much else can compare. The possibilities Corsair’s software presents are virtually endless in the hands of a creative user.” Over at Vortez, Tony Le Bourne got his game on with the M65 RGB and found it worthy of a Gold award: “After spending some time with the Corsair Gaming M65 RGB, the performance has proved to be strong and satisfying, making a trusted weapon for all FPS enthusiasts.” Finally, the optical version of our brand new Sabre RGB gaming mouse (a hit in its own right in the office) was reviewed at both Tweak.dk and Hardware Heaven and in both cases left with an award, with Tweak.dk giving it their “Great Product” award and Hardware Heaven giving it their Recommended award. With the rash of quality Corsair Gaming hardware out of the way, we turn our attention to reviews of our HX1000i power supplies. Corsair HX1000i Power Supply The 1,000-watt, 80 Plus Platinum, Corsair Link-enabled beast that is the HX1000i was reviewed by both eTeknix and Hardwareluxx, and in both reviews, walked away an award-winner. eTeknix’s Ryan Martin specifically concluded, “With silent operation, impressive performance and a selection of digital controls and monitoring the HX1000i offers a great cheaper alternative to Corsair’s premium AXi series.” Corsair Cases We also had three of our cases – including the recently launched Carbide Series 330R Titanium Edition – go out for review. The new 330R Titanium adds an attractive new gunmetal-colored brushed aluminum finish to the door of the 330R along with built-in fan control, and Technic3D was happy enough with it to give it their Silver award. The Tech Report revisited the Air 240 and discovered something you and I already knew: “With all of its stock fan mounts populated, the Carbide Series Air 240 delivers superb cooling performance.” That superb cooling performance, coupled with the killer feature set, earned our Air 240 a “Recommended” award. Rounding out our case reviews, TechPowerUp goes hands on with our Obsidian Series 250D. They called it a “small chassis with a huge punch” and gave it a 9.5 score and an Editor’s Choice award. Finally, the best of the rest: ConseilConfig.com reviewed our popular Hydro Series H75 liquid cooler (a perfect match for the HG10 bracket if ever there were one) and gave it a score of 4.1 out of five stars. …and last but not least, the crew over at Madshrimps put the screws to our Vengeance LPX DDR4 and made it sing. They said “Tweaking potential is more than present and this kit can compete with other high end kits, which might be higher priced.” For that potential, it earned a Performance award.
  12. While we’ve recently examined the incredible power consumption that Intel’s new Haswell-E Core i7s are capable of when overclocked, those numbers were generated in a vacuum of sorts; at maximum load, how much power can the Core i7-5960X draw? Today we’re going to look at it from a more practical perspective: under a series of tests, how much power does the Core i7-5960X draw? And what do you get for it? Our testing was done on the following system: CPU: Intel Core i7-5960X Motherboard: ASUS X99-DELUXE with 0904 BIOS DRAM: 4x8GB Corsair Dominator Platinum DDR4-2666 Graphics Card: NVIDIA GeForce GTX 780 Ti Power Supply: Corsair AX1200i CPU Cooler: Corsair Hydro Series H100i with push-pull SP120 fans Storage: 128GB and 256GB Force LX SSDsAs a refresher, these were the voltages required to hit each speed bin: You can see that once we start getting past 4GHz, the voltage needed to push the i7-5960X becomes more and more onerous. 4.3GHz is about the highest we can go before needing a serious voltage bump; 4.5GHz just isn’t possible on this sample. While all chips aren’t created equal, the four samples we’ve tested internally have all been fairly similar in this regard. During testing, we used Corsair Link to record power consumption from the wall. That means that for each benchmark, we have a score, average power consumption during the test, and peak power consumption. CPU utilization was also recorded during testing, but interestingly, we found no significant changes across clock speeds. For a practical test result, we ran PCMark 8’s Adobe application suite. This gives us a score that we can track along with watching how power consumption increases. Average power mostly hangs out around the 160W region until it starts taking off after 3.9GHz. Put into another perspective and measured as raw performance per watt, we can see that 3.9GHz, the observed sweet spot in our previous article, continues to be the best balance outside of stock speed. The Adobe applications in this suite appreciate any increase in clock speed, but if you’re concerned about increased power draw and heat, you may find yourself wanting to clock your chip more conservatively. For testing in Handbrake, we transcoded a 21 minute H.264 1080p60 video using Handbrake’s H.264 High Profile settings. Handbrake absolutely buries the CPU and is hands down the worst case scenario for power consumption in our practical testing; average power is never more than a few watts shy of peak power. Once again, there’s a slow and steady climb in power up to 3.9GHz, and then right after, it starts to go through the roof. In Handbrake we’re measuring performance per watt based on how many seconds each additional watt saves you when you overclock. Just fixing the wattage of the CPU and setting it to 3.5GHz across all eight cores actually helps tremendously with efficiency, and every step after that goes down. 3.9GHz is the way to go; after that, you start seeing seriously diminishing returns. SPECapc Lightwave 9.6 is used in 64-bit mode to see how the i7-5960X scales in 3D rendering tasks. Rendering time is a nice, gradual slope from stock speed to 4.4GHz, while average power is a more modest slope. As before, 3.9GHz seems to be about the sweet spot before power consumption starts climbing tremendously. Again we’re measuring performance per watt based on how many seconds each additional watt saves you in rendering time, and the main efficiency points seem to actually be 3.6GHz and 3.8GHz. This is an application that clearly benefits from some fine tuning. Our gaming tests were both run at 1440p and frankly, they’re a lot less exciting where overclocking the CPU is concerned. The reality is that after a certain point, GPU performance is everything. The i7-5960X doesn’t have any problems at all feeding the single 780 Ti. There just isn’t anything to be gained in efficiency by overclocking your CPU in these games. Intel’s clock speed control is smart enough to be able to only give them what they need, though, and that minimizes the increases in power consumption. BioShock Infinite and Tomb Raider both only go up 50W in average power when you push the i7-5960X from stock to 4.4GHz; contrast that against Handbrake, which increases by a staggering 120W. If you stick to our 3.9GHz sweet spot, you’ll only see a 20-30W increase. What can we conclude from all of this data? In most tasks, overclocking doesn’t tremendously impact Haswell-E’s efficiency. Most tasks. If you’re only planning on playing games, this CPU is beyond overkill and shouldn’t even be a consideration; it’s gross overkill even at stock speed. If you’re doing video or multimedia work, though, and power consumption and heat are considerations, I’d probably overclock up to about 3.9GHz. I hate that it’s not a round 4GHz, but 3.9GHz really seems to be the sweet spot on all of the processors we tested.
  13. Today’s review roundup is focused on DDR4. Now that they’ve had a chance to exist in the wild, reviewers have had time to play with our Vengeance LPX and Dominator Platinum DDR4 kits…and they liked what they saw. First blood was drawn stateside with TweakTown and Overclockers.com, and those reviews are in this earlier roundup. Today we’re expanding our net and tackling international coverage. Before we visit the UK, a trip to Hardware Heaven sees our Vengeance LPX DDR4-2800 kit tested against competing kits and coming out the fastest. That earned it a Recommended award. Proclockers.com tested our more mainstream 2666MHz Vengeance LPX kit, but found that even that kit was able to hit 2900MHz with some coaxing. The ability to go from fast to faster scored a Recommended award. OCDrift.com tested our Dominator Platinum DDR4 at 2800MHz and just like Proclockers, they found there was still some gas in the tank as the kit took to 3000MHz C15 with ease. Keep reading and you’ll find this is a trend. Starting with high performance and being able to go higher still earned the kit a Gold award. Hexus.net used our Vengeance LPX DDR4-2800 kit exclusively in their review of Intel’s Haswell-E platform, then examined the kit on its own and handed off an “Approved” award in the process. Overclock3D has spent an extensive amount of time with our Vengeance LPX kit as well, using it in their i7-5960X review and then featuring it in not , not , but separate videos. Continuing the trend, Hilbert Hagedoorn over at Guru3D also employed our Vengeance LPX for his maiden review of the Haswell-E platform. Over at eurogamer.net, Richard Leadbetter saw fit to outfit his entire test platform for Haswell-E with Corsair kit. That includes an RM1000, an H105 to keep the i7-5960X frosty, and of course, Vengeance LPX DDR4. You can see that review here. New friends over at Gaming Till Disconnected also came away happy with the Vengeance LPX kit; watch their video here. As it turns out, even outside of English-speaking countries, Corsair DDR4 is the weapon of choice for maximizing performance and stability with Intel’s new platform. Those of you who don’t speak French may want to fire up Google Translate for this next set of reviews. Reviewers from Clubic.com, Hardware.fr, 59Hardware, Ginjfo, Cowcotland, and multiple print publications all chose Corsair DDR4 for their X99 testbeds and Haswell-E CPU reviews. The reviewer at OverClex who spent a little extra time with our Vengeance LPX 2800MHz DDR4 kit was pleasantly surprised to discover a little bit of Corsair’s secret sauce: our 2800MHz kit runs at 1.2V, but a secondary XMP profile will bump the voltage to 1.35V and the speed to a brisk 3000MHz C16. That turned out not even to be the limit: his kit went up to 3200MHz C15. He gave it 4 out of 5 stars. The reviewer at Overclocking Made in France also had a chance to play with our Vengeance LPX 2800MHz DDR4 kit, and just like his peer at OverClex, he was able to hit 3200MHz. Another 4 out of 5 stars. Finally, if you expand into the Nordic countries and elsewhere in Europe, you’ll see the same thing happening: reviewers sticking with reliable Corsair DDR4 for their X99 reviews and testing. Swedish juggernauts Sweclockers used Vengeance LPX exclusively, as did Hardware.no and Tweak.dk. Likewise, over in Benelux, you’ll see the same choice at the incredibly popular Tweakers.net and especially Hardware.info, which used both Vengeance LPX and Dominator Platinum DDR4.
  14. We’ve done a couple FAQs and Q&As, but we haven’t painted a clear, by-the-numbers picture yet of what DDR4 really has to offer beyond DDR3. On the desktop side the lower power consumption is offset somewhat by the fact that the only platform that supports it starts chugging power the instant overclocking gets involved, while 16GB DIMMs (one of the key advantages of DDR4) aren’t expected to be available until 2015.That leaves us with performance. A lot of users are concerned that the increased timings on DDR4 make it inferior to DDR3 at similar speeds, but that doesn’t really tell the whole story. While DDR2 and DDR3 were architecturally very similar and took some time to separate, DDR4 is host to a few internal architectural changes that affect overall latency and performance. Those changes allow it to see benefits over DDR3 right out of the gate. I want to stress that this exercise, at least right now, is academic: there is no platform currently available that supports both DDR3 and DDR4. So if you want DDR4, you’re using Haswell-E, and vice versa. That makes this comparison a little bit difficult since it’s tough to quantify in apples-to-apples terms whether or not DDR4 really is “faster” than DDR3. For testing, I used three platforms with both single rank and dual rank DIMMs. Dual rank DIMMs increase parallelization a little bit at the cost of a very minor hit in latency, typically about 1ns. In lay terms, denser memory DIMMs (i.e. 8GB) get a little more mileage than lower capacity, single rank DIMMs (i.e. 4GB). Single rank DIMMs pretty much have to bank on hitting higher speeds to make up the deficit. These are the testbeds I used: Haswell Ivy Bridge-E Haswell-E CPU Intel Core i7-4790K Intel Core i7-4930K Intel Core i7-5960X Motherboard ASUS Z97-WS ASUS P9X79 Pro ASUS X99-Deluxe Single Rank Kit CMY16GX3M4A3000C12R CMD16GX3M4A2933C12 CMD16GX4M4B3200C16 Dual Rank Kit CMY32GX3M4A2800C12R CMY64GX3M8A2400C11R CMD32GX4M4A2800C16 Memory Channels 2x DDR3 4x DDR3 4x DDR4 Note that in each case, the CPU’s core clock was set to 4GHz and uncore clock was set to 3GHz. And these are the latencies I tested with at each speed: DDR3 DDR4 1600 MHz 10-10-10-30 1866 MHz 11-13-13-31 2133 MHz 11-13-13-31 15-15-15-35 2400 MHz 11-13-13-31 15-15-15-35 2666 MHz 11-13-13-31 15-15-15-35 2800 MHz 12-14-14-36 16-16-16-36 3000 MHz 16-16-16-36 3200 MHz 16-16-16-36 You can see I’ve tried to make it as apples-to-apples as possible, but these are different architectures and memory controllers. For bandwidth testing, I used AIDA64. I’m keen to point out before we get started that it’s tough to actually quantify “faster” since there are essentially four disciplines you’re looking at: three that are bandwidth related and one that is latency related. It’s more sensible to look for trends. READ 1600 1866 2133 2400 2666 2800 3000 3200 Haswell 1R 23233 26392 30586 34079 22850 23917 Haswell 2R 23982 27840 31833 35406 23585 Ivy-E 1R 41435 48444 50573 55197 Ivy-E 2R 43670 50520 57341 59831 Haswell-E 1R 54514 57664 60025 59651 60848 62407 Haswell-E 2R 56771 60231 62164 61045 So right off the bat, you can see Haswell’s dual-channel memory controller is going to have a hard time keeping up with the quad-channel memory controllers on Ivy Bridge-E and Haswell-E. What’s notable right off the bat, though, is that DDR3 and DDR4 are very close at the same clock speed despite DDR4’s increased CAS latency. In fact, if you’re using single rank DIMMs, DDR4 is measurably faster than DDR3. You may also be seeing Haswell’s memory bandwidth take a bath after 2400MHz; this is something independently verifiable. Latency continues to improve past 2400MHz, but memory bandwidth takes a consistent hit. Meanwhile, Haswell-E’s DDR4 controller takes a slight dip at 2800MHz when we have to shift to CAS16 from CAS15, but resumes climbing at 3000MHz and 3200MHz. WRITE 1600 1866 2133 2400 2666 2800 3000 3200 Haswell 1R 23715 27157 30852 34819 22926 24053 Haswell 2R 25132 29222 33248 37415 24158 Ivy-E 1R 30537 33096 37845 42184 Ivy-E 2R 31488 52746 60432 43347 Haswell-E 1R 46711 46817 46919 46888 46927 47009 Haswell-E 2R 47758 47832 47892 47912 At this point it’s obvious Intel’s Ivy Bridge-E and Haswell DDR3 controllers just weren’t architected to handle high speeds. Ivy Bridge-E and DDR3 do offer consistently higher write speeds than DDR4 does (provided you’re running dual rank modules), while DDR4’s write speed is essentially constant and stable at about 47GB/s. While write speeds are obviously a weak point in Haswell-E’s DDR4 memory controller, they’re really the only one. COPY 1600 1866 2133 2400 2666 2800 3000 3200 Haswell 1R 21557 24347 27535 30596 22256 23324 Haswell 2R 23794 27262 30494 33635 23557 Ivy-E 1R 39492 44368 49485 54149 Ivy-E 2R 43876 51026 58393 59667 Haswell-E 1R 52447 57749 62076 62793 65558 68990 Haswell-E 2R 56066 61703 67144 59848 Memory copy functions start slightly behind DDR3 at 2133MHz and then pretty much start soaring past it at 2400MHz. Judging from the synthetics so far, it seems like users who want to start getting the most out of Haswell-E should be looking at 2666MHz kits at a minimum. Again, mainstream Haswell’s dual-channel DDR3 controller is totally outclassed by the fatter pipes of these higher end, hexa-core and octal-core processors. COPY 1600 1866 2133 2400 2666 2800 3000 3200 Haswell 1R 60.2 57.2 53.6 48.6 46.1 45.6 Haswell 2R 61.5 58.3 53.7 49.4 46.5 Ivy-E 1R 78.3 72.2 65.7 60.6 Ivy-E 2R 80.8 67.7 60.1 61.7 Haswell-E 1R 71.3 66.2 62.3 63.3 61.2 56.3 Haswell-E 2R 72.9 67.5 63.3 64.6 This is probably the biggest bugbear in the transition from DDR3 to DDR4. But users expecting DDR4 to grossly underperform DDR3 due to the higher CAS latency are going to be in for a surprise: as you ramp DDR4 to its intended speeds, latency actually drops below DDR3 (excepting Haswell’s dual-channel controller, which is just plain lower latency than both quad-channel controllers.) So while it’s true that DDR4 can be as much as 10ms slower than DDR3 at the same clock speed, it still has lower latency at its mainstream speeds, and the deficit isn’t any greater than if you were going from Haswell’s dual-channel controller to Ivy Bridge-E’s quad-channel. Ultimately that’s kind of the takeaway here: DDR4 starts at very high speeds with room to scale higher, and at those entry level speeds, it’s faster and more capable than its predecessor in almost every test. Mainstream DDR4 actually winds up with lower overall latency and higher bandwidth than mainstream DDR3. In the future we’ll be testing DDR4 in practical applications to see if there are performance gains to be had from exceeding the baseline 2133MHz, but for now it’s clear that if nothing else, DDR4 is a more than worthy successor to DDR3, and fears regarding the higher timings resulting in substantially increased overall latency are by and large unfounded.
  15. If you were at PAX, then you already know we had a couple of incredibly beefy gaming systems with tri-monitor surround configurations set up there. Of course, if you weren’t, then the systems we had built up for head-to-head gaming might surprise you a little…especially since we couldn’t even announce what was running in them until August 29th. But that time has passed, and now we can show you our PAX Graphite 780T red and blue configurations. We knew in advance that Intel would be using PAX Prime as their opportunity to launch their new high end desktop platform, complete with Haswell-E processors, X99 chipset, and DDR4 support. It would have been frankly embarrassing if we showed up with anything less. That’s why we got these two bad boys ready to go. These two systems were almost identically configured with the components listed below: Processor Intel® Core i7 5960X Motherboard Asus® X99-DELUXE GPU 2x EVGA® GeForce GTX 780 ACX Superclocked Case Corsair Graphite Series 780T White PSU Corsair HX1000i Power Supply (Blue); Corsair AX1500i Power Supply (Red) Memory Corsair Vengeance LPX Black DDR4 2800MHz (4x4GB) Storage Corsair Neutron GTX 240GB Cooling Corsair Hydro Series H105 Additionally, we used red and blue sleeved cables along with red and blue SP120 and SP140 LED fans to contrast the systems against each other. You can see glamour shots of the two systems below. With eight fast cores, sixteen gigabytes of new DDR4 memory, and dual GeForce GTX 780s in SLI in each system, let’s just say we didn’t have much trouble running our games at the required 5760x1080 resolution that the trio of monitors plugged into each system called for. Here the blue/white system is in action at PAX Prime and barely breaking a sweat.
  16. With the launch of DDR4 in conjunction with Intel’s Haswell-E high end desktop platform, it only makes sense for us to provide you with as much information as possible about this exciting new memory technology. Not just in terms of why you might need it or what it might offer you, but what it is and how to use it. DDR4, the X99 chipset, and the Haswell-E platform are all brand new technology and this is about as bleeding edge as it gets. To that end we’ve authored a whitepaper for the more technical folks in our readership as well as this FAQ. The whitepaper is aimed at an enthusiast level: not low level technical detail, but not overly simplified either. If that sounds like you, have a look here. Frequently Asked Questions Why do we need DDR4? There are four major reasons why DDR4 is set to replace DDR3: it’s capable of hitting faster speeds, it’s capable of hitting higher densities (16GB DIMMs are expected in 2015), it has improved error correction built into the baseline specification, and it consumes less power for equivalent or better performance than DDR3. In short, while DDR3 is butting up against its limitations today, DDR4 still has a tremendous amount of room to scale. Is DDR4 slower than DDR3? Because DDR4 uses looser latencies than DDR3 does, it can be slightly slower than DDR3 at the same clock speeds. What makes DDR4 important is that it can easily make up for that deficit by hitting higher clock speeds than DDR3 can. Getting DDR3 to run at 2666MHz or higher requires very careful binning of memory chips and can be very expensive, while 2666MHz is the lowest speed we’re launching DDR4 at. Is DDR4 backwards compatible with DDR3? No. DDR4 and DDR3 have key notches in different places on the DIMM to prevent them from being mixed up, and Haswell-E and X99 are DDR4 only. Does DDR4 have XMP? Yes! We’ve been working hard with all major motherboard vendors to ensure compatibility with our high speed DDR4 memory, and that includes XMP. DDR4 employs a new specification, XMP 2.0, while DDR3 remains on XMP 1.3. How does XMP work on DDR4? Very similarly to DDR3, but with some caveats. For starters, Haswell-E tops out at a 2666MHz memory strap, which is very low for what DDR4 can do. Since XMP specifies speeds in excess of 2666MHz, your motherboard BIOS has to compensate somehow. Typically, when XMP tells the motherboard to use a higher memory speed than 2666MHz, the motherboard BIOS will bump the BClk strap from 100MHz to 125MHz. That’s normal, but that change will also increase the clock speed of the CPU itself; a well-designed BIOS will compensate and bring the CPU clock speed in line. Why are there two XMP profiles on my Corsair DDR4? We include a pair of XMP profiles instead of just one for users who want to control how much power is consumed by the memory. The first XMP profile runs the DDR4 at its specification of 1.2V, while the second offers a higher speed at the cost of bumping the voltage to 1.35V. The first profile, then, is officially supported, while the second is not and instead offers a baseline of what the memory should be able to achieve. Why am I encountering stability issues with XMP? While we’ve been working around the clock with motherboard vendors to maximize compatibility and performance, these technologies are all very new. If you have trouble with stability using either XMP profile, we recommend either manually entering the speed and timings the DDR4 is rated for or running your memory at its default speeds until your motherboard vendor provides a BIOS update to improve stability. I’m running at the default 2133MHz speed, but my system still isn’t stable. Double-check to see which memory slots your DDR4 is installed in against your motherboard’s instruction manual. We’ve found that you have to install your DIMMs in the primary set of memory channels first, in order, to ensure stability. If this checks out, please contact our tech support. What’s the difference between Dominator Platinum DDR4 and Vengeance LPX DDR4? Vengeance LPX is our mainstream DDR4, utilizing a standard height PCB and heatspreader. Dominator Platinum DDR4 adds a larger, more robust heatspreader as well as compatibility with our Light Bar Kit, Dominator Airflow Platinum fan, and Corsair Link for monitoring voltage and temperature (Airflow Pro required.) What can we expect from DDR4 in the future? We’re launching DDR4 at up to 3000MHz speeds and 8GB per stick densities, but that’s just this year alone. DDR4 is expected to hit 16GB densities in 2015, allowing your X99 motherboard to support a staggering 128GB of memory (provided it has eight memory slots). In short, it’s gonna get bigger, and it’s gonna get faster. Where can I learn more about DDR4? As I mentioned in the introduction, we’ve authored a whitepaper that provides a much more detailed examination of this new memory technology. You can find it here.
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