memory timings

[fifo]

Hi,

 

I have recently purchased 8gb denominator platinum CMD8GX3M2A2133C9

Now I'm thinking I should have got the CMD8GX3M2A2133C8. Is there a noticeable speed difference between the two. I am planning to use it with a z97 chipset motherboard and a core i7 4790k 4ghz. Will i be abe to get 2133 mhz with the core i7 or just 1600

In which case the CMD8GX3M2A21600C7 would be better.

[emissary42]

I have recently purchased 8gb denominator platinum CMD8GX3M2A2133C9. Now I'm thinking I should have got the CMD8GX3M2A2133C8.

I have had CMD8GX3M2A2133C9 and the appropriate quad kit (CMD16GX3M4A2133C9) and these both were exceptionally high quality. Keep in mind these are 1.50V kits, even at their rated speed of DDR3-2133. They also will overclock to DDR3-2400 no problem, if you ever feel like it. The CMD8GX3M2A2133C8 are a fairly new piece and i never had one of those myself, so they're bit hard to judge for me.

 

Is there a noticeable speed difference between the two.

The difference is negligible for 24/7 use.

 

I am planning to use it with a z97 chipset motherboard and a core i7 4790k 4ghz. Will i be abe to get 2133 mhz with the core i7 or just 1600

With a 4790K and a Z97 mainboard, there a practically no limits on maximum memory clock. All you have to do is enable the XMP in the UEFI. That would also be needed for all other XMP enabled memory kits and even the CMD8GX3M2A21600C7 you mentioned. If you don't know how to do that, look it up in your motherboards user manual.

[fifo]

Thanks for the quick reply, much appreciated.

 

I thought the core i7 had a 1600 mhz limit . On the

Intel website it says memory type 1333/1600 mhz

Isn't this referring to the highest memory frequency.

When you enable xmp do you have to enter the timings or the

MB will auto detect the timings and voltage.

I,m planning to go for the gigabyte Z97 UD5 BK MB will this support 2133 mhz memory.

It seems to be the only gigabyte mb that has the m2 connector

For fast ssds but it doesn't have the thunder bolt 2 connector. I just can't

Find an Mb that has both m2 AND thunderbolt 2 connectors. I have been looking at gigabyte

Because their boards are ultra durable, don, t know how asus mb's are?

You know any high end well featured mb' s?

[pegotico]

yes it will support 2133 and higher, up to 3000!!

 

 

Support for DDR3 3000(O.C.) / 2933(O.C.) / 2800(O.C.) / 2666(O.C.) / 2600(O.C.) / 2500(O.C.) / 2400(O.C.) / 2200(O.C.) / 2133(O.C.) / 2000(O.C.) / 1866(O.C.) / 1800(O.C.) / 1600 / 1333 MHz memory modules

[emissary42]

I thought the core i7 had a 1600 mhz limit. On the Intel website it says memory type 1333/1600 mhz

Thats only partially true. See: http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xmp-memory-for-intel-core-processors-datasheet.xlsx

 

When you enable xmp do you have to enter the timings or the MB will auto detect the timings and voltage.

The XMP contains all necessary information and the board will set timings, voltages and memory clock accordingly. So unless something goes wrong you don't have to input anything manually.

 

I,m planning to go for the gigabyte Z97 UD5 BK MB will this support 2133 mhz memory. It seems to be the only gigabyte mb that has the m2 connector For fast ssds but it doesn't have the thunder bolt 2 connector. I just can't Find an Mb that has both m2 AND thunderbolt 2 connectors.

If you look at other manufacturers, there still is the ASUS Z97-Deluxe [NFC & WLC] (90MB0HZ1-M0EAY0).

 

I have been looking at gigabyte Because their boards are ultra durable, don, t know how asus mb's are? You know any high end well featured mb' s?

You could just buy a Gigabyte Z97X-UD7 TH and use a PCIe / SATA to M.2 adapter, since you will probably have more than enough space to mount it somewhere in a full ATX build.

[fifo]

thanks for the reply emissary42,

 

I'm surprised the datasheet says it can go up to 3000 mhz yet intels website specifies 1333/1600 mhz why. I'm assuming i don't have to overclock the processor to get the 2133MHz.

 

What did you replace your CMD8GX3M2A2133C9 with?

Do You know when the CMD8GX3M2A2133C9 was launched?

I want to buy some more and understand that they have to be the same type to match your existing memory, but seems like not many retailers seem to sell them anymore. Are they end of line?

 

Thanks for the info on the motherboard. Seems like the asus is only available from private sellers who are pricing it quite high, i guess it must be end of line. Is there a newer version?

Whats your experience between asus and gigabyte motherboard in terms of quality durability and reliability? I have never had an Asus motherboard before hence don't know how good or durable they are.

I'm assuming the Gigabyte Z97X-UD7 TH is the same as UD5-BK except it has a thunderbolt 2 connector instead of an M2. I don't understand why gigabyte didn't make an MB with both interfaces. Do you know what is the thunderbolt 2 useful for besides driving displays? I'm just wondering which interface is most worth having Thunderbolt 2 or M2 for SSD.

 

I could only find one retailer that does a PCIE to M2 NGFF

I have found others, but they do the Sata to M2 which only gives a max of 6Gb/s which i think the PCIE version would give me the 10Gb/s. What do you think?

[emissary42]

I'm surprised the datasheet says it can go up to 3000 mhz yet intels website specifies 1333/1600 mhz why. I'm assuming i don't have to overclock the processor to get the 2133MHz.

Well, based upon Intels specifications everything over DDR3-1600 CL11 is overclocking the processors integrated memory controller. I wouldn't worry too much about it, since memory overclocking has become super ez with Haswell and basically all the recent kits being tested and optimized for this exact architecture.

 

What did you replace your CMD8GX3M2A2133C9 with?

Well i was doing a user review with it and afterwards decided to get and keep myself a CMD16GX3M4A2400C9 and CMD16GX3M4A2666C10. Both are way pricier of course, so i wouldn't recommend them unless you don't care about bang for buck and are really into overclocking. The CMD8GX3M2A2133C9 (2x4) and CMD16GX3M4A2133C9 (4x4) are very close in performance and offer the better value for money regarding everyday use.

 

Do You know when the CMD8GX3M2A2133C9 was launched?

In 08/2012.

 

Are they end of line?

I guess the ICs used on them are no longer in production and i don't know how many kits Corsair does still have in their inventory. So yeah, availability is not the best and the price did go up a bit (but this is a mood point now, with DDR3 memory prices on the rise in general).

 

Thanks for the info on the motherboard. Seems like the asus is only available from private sellers who are pricing it quite high, i guess it must be end of line. Is there a newer version?

Not, this is the most recent Deluxe model and it should be available at every decent retailer.

 

EU: http://geizhals.at/eu/asus-z97-deluxe-nfc-wlc-90mb0hz1-m0eay0-a1106044.html

 

In the US it is available at the egg, tigers and most of the other bigger online shops.

 

Whats your experience between asus and gigabyte motherboard in terms of quality durability and reliability?

I was very happy with my ASUS Maximus V Extreme. It took all the abuse i threw at it like a champ for three years and is still alive and kicking. The Deluxe variants are their top of the line Non-ROG models and are considered very solid. Maybe just give it try...?

 

Do you know what is the thunderbolt 2 useful for besides driving displays? I'm just wondering which interface is most worth having Thunderbolt 2 or M2 for SSD.

If you don't even know what to get Thunderbolt for, you can probably just skip it ;)

[fifo]

Hey thanks for the info!

 

Now i am getting the choice to exchange the memory for

CMD8GX3M2A2133C8, but i have been told that i really won't notice any difference going from C9 to C8. Is this true? Is it worth exchanging it?

Secondly when i check the specs for the C8 online the stated voltage seems to be 1.65v where as the C9 is 1.5V. Now when i look at the corsair website the SPD voltage of the C8 is 1.5V but the tested voltage is 1.65V. The corsair website does not have any info on the C9 variant. I have looked at other c9 memory such as the CMD32GX3M2A2133C9 which also states spd 1.5v and tested voltage of 1.65v.

 

I called corsair technical support.

one rep said that the letter A or B means different chip or voltage.

the second said any xmp memory will run at 1.65 v above 1600Mhz. The xmp will increase the voltage to 1.65v.

 

Now you have tested the CMD8GX3M2A2133C9, to make it run at 2133Mhz was the voltage increased to 1.65v?

 

The strange this is that the CMD8GX3M2A2133C9 is always advertised with a voltage of 1.5v and the CMD8GX3M2A2133C8 is advertised with a voltage of 1.65v when i look at the specs online. I thought the C9 or C8 is only latency?

 

I have also seen the CMD16GX3M2A2133C9 for just £18 more on offer, the spec for this also state 1.65v even though it is almost identical partnumber just the size value is different 16 instead of 8.

This seems very tempting. What do you think. Just confused with this voltage thing technical support telling me different things. What to do? Would 16Gb be useful for video editing/ paintshop pro, gamimg

[emissary42]

Now i am getting the choice to exchange the memory for

CMD8GX3M2A2133C8, but i have been told that i really won't notice any difference going from C9 to C8. Is this true? Is it worth exchanging it?

Have you already gotten the CMD8GX3M2A2133C9? Then just keep it and don't bother exchanging it with CMD8GX3M2A2133C8. I doubt you will notice any difference in everyday use.

 

Secondly when i check the specs for the C8 online the stated voltage seems to be 1.65v where as the C9 is 1.5V. Now when i look at the corsair website the SPD voltage of the C8 is 1.5V but the tested voltage is 1.65V.

SPD voltage: used for all the JEDEC standard profiles, DDR3-1333 etc

XMP voltage: used only for the XMP (Intel Extreme Memory Profile)

 

The corsair website does not have any info on the C9 variant.

 

I called corsair technical support. one rep said that the letter A or B means different chip or voltage. the second said any xmp memory will run at 1.65 v above 1600Mhz. The xmp will increase the voltage to 1.65v.

So much confusion about the 2133 Platinum everywhere. So here it goes:

 

CMD8GX3M2A2133C9 (2x4GB) / CMD16GX3M4A2133C9 (4x4GB) --> DDR3-2133 9-11-10-30 1.50V(!)

CMD8GX3M2B2133C9 (2x4GB) / CMD16GX3M4B2133C9 (4x4GB) --> DDR3-2133 9-11-11-31 1.65V

CMD8GX3M2A2133C8 (2x4GB) / CMD16GX3M4A2133C8 (4x4GB) --> DDR3-2133 8-10-10-27 1.65V

 

Oddly enough the product page for the CMD8GX3M2A2133C9 seems to have gone missing.

 

Now you have tested the CMD8GX3M2A2133C9, to make it run at 2133Mhz was the voltage increased to 1.65v?

This specific kit and its 4x4GB counterpart feature 1.50V XMP voltage.

 

http://mods.hardwareluxx.de/emissary42/domplt/e42corsairdominatorplatinumreview_label_2133a.jpg

 

The strange this is that the CMD8GX3M2A2133C9 is always advertised with a voltage of 1.5v and the CMD8GX3M2A2133C8 is advertised with a voltage of 1.65v when i look at the specs online.

Different ICs used and/or different bin. These are two completely different kits.

 

I have also seen the CMD16GX3M2A2133C9 for just £18 more on offer, the spec for this also state 1.65v even though it is almost identical partnumber just the size value is different 16 instead of 8.

This seems very tempting. What do you think. Just confused with this voltage thing technical support telling me different things.

See the photo above. If it is CMD16GX3M4A2133C9 (edited typo) then it is the kit with 1.50V XMP voltage. It is a very nice kit and i'd personally prefer it to both the 1.65V alternatives.

 

 

Dayum, i should be taking money for this :rofl::sunglasse

[fifo]

Thanks for clarifying that, you'd make an excellent tech support rep!

 

Right the 16gb part number I'm looking at is

CMD16GX3M2A2133C9 this is 2 x 8 gb kit

On amazon it says 1.65v see link below

 

http://www.amazon.co.uk/gp/product/B00B3OV4DE?ie=UTF8&at=&force-full-site=1&ref_=aw_bottom_links

 

Could you verify the voltage? 1.65 or 1.5

 

The photo you showed me is CMD16GX3M4A2133C9

Which is a 4 x 4 gb kit.

Thus would a 2x 8gb kit be 1.65v

 

Now one of the tech support rep said that 1.5v memory

work better on z97x motherboards. The 1.65 v were good for older chip sets.

This is kind of strange considsring most new memory on the corsair sitd has a

Tested xmp voltage of 1.65v.

 

I haven't received my 8gb c9 yet still waiting for dispatch.

Now the CMD16GX3M2A2133C9 2x 8gb kit is just 18 pounds

more than the CMD8GX3M2A2133C9 2 X 4GB KIT tempting

The thing is the 2 x 8gb kit is 1.65v and

The 2 x 4gb kit is 1.5 v

 

The 4 x 4 gb kit is 254 pounds BIG DIFFERENCE compared to the

2 x 8gb both are 16 gb why such a big difference is it because

The voltage is 1.5v??

 

Don't know whether you can get 2 x 8gb kit at 1.5v

What do you think , the 16 gb 2 x 8gb seems good value

Does the voltage difference affect performance in any way?,

If not then I could go for the 16 gb.

Regarding the 8gb c8 1.65v

Compared to 8gb c9 1.5v

Would you agree that the c9 is better as it is

1.5v and I wouldn't notice a difference of cas of 1?

[emissary42]

Right the 16gb part number I'm looking at is CMD16GX3M2A2133C9 this is 2 x 8 gb kit On amazon it says 1.65v

My bad, i was reading that wrong and though you were talking about the 4x4gb kit. The 2x8GB kit actually is rated 1.65V.

 

Now one of the tech support rep said that 1.5v memory work better on z97x motherboards. The 1.65 v were good for older chip sets.

From a certain memory clock onwards there are only 1.65V kits left. Basically anything over DDR3-2133 and even most DDR3-2133 themselves are 1.60-1.65V. Below that, you would usually prefer the lower voltage kits unless you're looking for something very specific.

 

I haven't received my 8gb c9 yet still waiting for dispatch. Now the CMD16GX3M2A2133C9 2x 8gb kit is just 18 pounds more than the CMD8GX3M2A2133C9 2 X 4GB KIT tempting

Well with a price difference that small for 8gb vs 16gb you don't need to be a genious to figure out what to get.

 

The 4 x 4 gb kit is 254 pounds BIG DIFFERENCE compared to the 2 x 8gb both are 16 gb why such a big difference is it because The voltage is 1.5v??

Availability & demand, higher binned ICs and two additional heatspreaders for four modules vs just two (kidding).

 

Regarding the 8gb c8 1.65v Compared to 8gb c9 1.5v Would you agree that the c9 is better as it is 1.5v and I wouldn't notice a difference of cas of 1?

Both of my CMD8GX3M2A2133C9 and CMD16GX3M4A2133C9 were awesome overclockers (DDR3-2400 C9 @ 1.65V and DDR3-2600 CL10 @ 1.65V). I never had the C8s myself, so i can't really say anything about them.

 

You won't notice the difference in CAS latency 8 vs 9 in everyday use.

[fifo]

Thanks,

 

It seems like the 8gb 2133 c9 1.5v has overclock

Potential to 2400 mhz when increased to 1.65v

 

How about the 16 gb 2133 c9 1.65 could this

Overclock to 2400 mhz without increasing the voltage

any further as it is already rated at 1.65v.

[emissary42]

Check the WWW for reviews or user feedback about overclocking potential on that kit.

 

It probably has some headroom at CL=10, but YMMV.

[fifo]

Sorry what do you mean byYMMV?

 

I don, t think the 2 x 8gb 1.65v kit would over clock better (because it is tested at 1.65v) than the 2 x 4gb 1.5v kit .

 

What is the advantage of having a 4 x 4gb to make 16 gb instead of 2 x 8gb for a dual channel memory mb? Is it so it can be used on some quad channel motherboards?

 

It seems like the overclocking results vary. The CMD8GX3M2A2133C9 2 x 4 gb kit that you got to overclock to 2400 mhz in the following review they only

got it to overclock to 2200 mhz which is negligible really and that's by increasing the voltage and relaxing the timings.

 

http://www.xbitlabs.com/articles/memory/display/corsair-dominator-platinum_7.html#sect0

 

I am looking for a review for the CMD16GX3M2A2133C9, can't seem to fine one, i'm interested to see how much it can overclock if any.

 

I guess the size of the ram 16gb/8gb out weigh the benefits of the overclocking potential and voltage.

Is 16gb of ram useful or is 8gb enough when doing Video editing, Graphics software photo shop, Some gaming?

I suppose more ram means system could be faster as it does not have to swap to disk every now and then, that is if it does when you have 8gb running windows 7?

 

One of the things i'm concerned about is whether the CMD16GX3M2A2133C9 1.65v will run ok with the new Z97x chipset motherboard which i am going to get.

Technical support seems to give me mixed vibes, one guy said the 1.5v memory works better with newer chipsets, the other said all memory will run at 1.65v above 1600 clock.

Most of the ram on the corsair online shop is rated as 1.65 tested voltage - does this mean they will not work very well with the latest z97x chipset?

 

P.S. Sorry to be a right PAIN.

[LangZone]

YMMV - Your Mileage May Vary

 

Z97x will handle 1.65v fine.

[fifo]

But intel specify 1.5v for ram for haswell see link below

 

https://communities.intel.com/mobile/mobile-access.jspa#jive-content?content=%2Fapi%2Fcore%2Fv3%2Fcontents%2F132479

 

http://www.tomshardware.co.uk/answers/id-2051214/4670k-recommended-ram.html

 

Intel say it could damage the processor.

[emissary42]

What is the advantage of having a 4 x 4gb to make 16 gb instead of 2 x 8gb for a dual channel memory mb? Is it so it can be used on some quad channel motherboards?

That and sometimes if you are an overclocker you want modules with certain ICs and therefore pick 4x2GB instead of 2x4GB and 4x4GB instead of 2x8GB. It comes down to knowing what you want and what suits your needs. Everyone unsure about what to get is probably better off with less / larger modules (so 2x8Gb in your case).

 

It seems like the overclocking results vary. The CMD8GX3M2A2133C9 2 x 4 gb kit that you got to overclock to 2400 mhz in the following review they only got it to overclock to 2200 mhz which is negligible really and that's by increasing the voltage and relaxing the timings.

 

http://www.xbitlabs.com/articles/memory/display/corsair-dominator-platinum_7.html#sect0

That's hilarious, they didn't even get the CMD8GX3M2A2666C11 to overclock at all. This is a kit very commonly used by overclockers worldwide. The tester(s) obviously has/had no idea or very limited knowledge about overclocking memory. Now people get false impressions about certain kits and what they're capable of from this oh so professional review. And that is just sad.

 

Interesting read: http://www.overclockers.com/forums/showthread.php?t=716249 & http://www.xtremesystems.org/forums/showthread.php?282708-Corsair-Dominator-Platinum-2666-C10-amp-C11

 

Is 16gb of ram useful or is 8gb enough when doing Video editing, Graphics software photo shop, Some gaming?

Someone else can't really answer questions about your own needs, but it is something you can easily test by yourself. For most games* 8gb should be enough, unless you plan to be a game steamer (think twitch).

 

*yes, there some rare exceptions and there probably will be more in the years to come

 

One of the things i'm concerned about is whether the CMD16GX3M2A2133C9 1.65v will run ok with the new Z97x chipset motherboard which i am going to get.

I linked you the official Intel document about that earlier. A Vdimm of 1.65V is not a problem whatsoever. If you want to stay within each and every specification then forget higher end memory altogether, as anything faster than DDR3-1600 CL11 is considered overclocking by Intel standards, regardless of voltage.

 

Just a personal note: I can't remember my last CPU that died because of memory overclocking but had several dead chips from overclocking the cpu itself (again YMMV).

[fifo]

That excel worksheet you sent me a link to is that from intel them selves or someone who has done the testing on intel cpus?

 

Have you seen this link from intel.

 

https://communities.intel.com/mobile/mobile-access.jspa#jive-content?content=%2Fapi%2Fcore%2Fv3%2Fcontents%2F132479

 

Here they are saying that non of their cpus are designed to vork at voltages greater than 1.5v. If you use 1.65 volts, its at your own risk, and will also void your warranty.

Their saying that the mch controller is designed to work at 1.5v only, increasing the volatge may damage the processor.

 

Now i can't see how they can say this and then procduce a document of supported memory modules with voltages greater than 1.5V? That is contradictory information.