jetspeedz Posted October 7, 2023 Share Posted October 7, 2023 Hi looking to see if anyone has successfully ran this 48GB kit on XMP at 7800MT/s? Looking to get MSI MPG z790 Edge which lists this kit as compatible with the MB but I'm skeptical it is running at 7800MT/s honestly. Would rather confirm before spending more on this RAM. Cheers Link to comment Share on other sites More sharing options...
c-attack Posted October 8, 2023 Share Posted October 8, 2023 Anything above 7600 is going to be dicey on most motherboards as it is usually the limiting factor. 2 DIMM slot boards like the Asus Apex or maybe top tier thick PCB boards like the MSI Godlike have a better chance but no guarantees. If you are not into hand tuning your RAM and just want to set XMP and be done, this is not where you want to be. If you want one click and done, you’ll be better off with the 7200 or 7600 kit, both of which should be able to run XMP without much tweaking. BIOS setting do matter here and the board maker has to program proper VDDQ, IMC, and VCCSA voltages for the module. Link to comment Share on other sites More sharing options...
jetspeedz Posted October 10, 2023 Author Share Posted October 10, 2023 I get what you are saying but they are advertising the XMP speed of 7800Mhz which should in theory not require tweaking. I personally have a hard time believing they are running at 1.4v stable but good luck trying to get someone competent on MSI phone or web support. If i can get this kind of speed XMP would be great but I don't know if i can trust their list one bit. This is why i asked if anyone has tested this specifically. Sometimes you get lucky and the XMP just works Link to comment Share on other sites More sharing options...
LeDoyen Posted October 10, 2023 Share Posted October 10, 2023 Should ? no. Could, yes. Hitting a certain memory speed is always dictated by what the memory can do (yours can hit 7800), what the CPU memory controller can do (good old silicon lottery), and the motherboard. the higher you try to go, the more chances there are you may have to tweak to compensate for your weakest component. That's why if you don't want to tweak anything it's usually preferable to aim a bit lower and be done. It's overclocking after all 🙂 Link to comment Share on other sites More sharing options...
jetspeedz Posted October 10, 2023 Author Share Posted October 10, 2023 Yea that is understandable. My thoughts are if it is rated at 7800 and I need to underclock it to 7600 to be stable that maybe what I I have to settle for. If i start at 7600 and have to under clock that down than I'm going below what I want to be running which is 7600 or higher. The problem is Corsair can't guarantee which version of RAM i will get, if the CPU memory controller and MB are all good there is no guarantee I can get the version they tested. It really is a crapshoot. I can order a Team group 7600 for 164 on sale on Amazon and live with it maybe not doing 7600 or roll the dice on this at $240 and pay more Link to comment Share on other sites More sharing options...
c-attack Posted October 11, 2023 Share Posted October 11, 2023 (edited) Motherboards are going to be the limiting factor this go round. If you are willing to manually tune at least the primary timings and voltages, then it is an easy step down to 7400-7600 that should work on most moderate to high end boards. If you want XMP and done, then go lower. Remember the XMP is a preset, not a bypass of the all the other systems involved. There are a number of kits in the 7200-7600 XMP range that all will be Hynix M die and clock up as far as your MB can take it. You can choose freely within that group based on price and availability. They all should run more or less the same at a specific set of timings. M die is rated for 1.40v and more voltage efficient than A die. It does better going up in frequency vs cranking down on the primary/secondary/tertiary timings like A. However, no free lunch with this stuff. A 24GB module is more dense and you can't increase capacity without a trade off. Lots of reviews of out not for M die 24GB modules. Scan a few and note the motherboard they are using for testing. Really just the one that can push up that high. Edited October 11, 2023 by c-attack Link to comment Share on other sites More sharing options...
jetspeedz Posted October 15, 2023 Author Share Posted October 15, 2023 Yea agree, what i find fascinating is when the MB MFG tells me they made Zero changes to XMP and it runs stable. I just have a hard time believing that. I think the lack of understanding how RAM works in these ways is telling of their ignorance. Guess that is to be expected when you are dealing with level 1 support. I couldn't find much on the 24GB modules in terms of reviews or use case. Most as you can imagine are using the 16GB versions getting them to 8000 and above. I'm going to roll the dice and see what happens. Getting it running anywhere near these timings will be great but I'm skeptical XMP alone just works. Link to comment Share on other sites More sharing options...
c-attack Posted October 16, 2023 Share Posted October 16, 2023 (edited) You've got a different board, so I don't know how much this will help. I was not able to get the 2x24 8000 kit to run fully stable on my Asus Z790 Hero. I went up with primary timings, up to 1.55 on voltage, and it just won't pass the hard RAM testing. It always boots, but when it flunks a Pi check in less than 5 seconds, you're a long way from safe. Not coincidentally neither of my two A die kits XMP 7600 and 7200 can run 7800 or 8000 stable either. All will run 7600 with tight timings, except the 24GB kit that needs to stay somewhat loose. In the end, the motherboard is limiting me and it has a clear wall I can't climb at 7600. A couple of reviews. Note they all test on a 2 DIMM Asus Apex. That's the one board that seems to be able to run 8000 consistently. Even though the reviews are for the new Titanium packing, it's still Hynix M die 24GB underneath and that is the key similarity. The rest is RGB and heatsink. https://www.techpowerup.com/review/corsair-dominator-titanium-ddr5-7200-2x-24-gb/ https://www.tweaktown.com/reviews/10543/corsair-dominator-titanium-first-edition-ddr5-7200-32gb-dual-channel-memory-kit/index.html Edited October 19, 2023 by c-attack Link to comment Share on other sites More sharing options...
jetspeedz Posted October 17, 2023 Author Share Posted October 17, 2023 Thanks for the links, interesting read. I went ahead and ordered this set, curious what the itx board can do, specs say tested to 8000mhz xmp since its a 2 dimm slot MB it's more ideal. MSI confirmed the QVL for memory on 13th gen is same as 14th gen. Ordered 14900k this MB and this RAM, lets see what i can squeeze out of it stable with this combo. Apex i couldn't find for sale and gigabyte just as bad when it comes to stock. Heard the rumor the Apex was discontinued, frankly I need a single GPU out so Apex wouldn't work anyway, not running a GPU since I don't game the 770 onboard is plenty to run a 5k2k monitor i have. Link to comment Share on other sites More sharing options...
c-attack Posted October 17, 2023 Share Posted October 17, 2023 14900K might boost your chances. In the current state of affairs, the IMC in the CPU seems to be the lowest ranking factor but it still might be enough to get you to 7800-8000. Link to comment Share on other sites More sharing options...
jetspeedz Posted October 18, 2023 Author Share Posted October 18, 2023 Should be here all by the end of the week to start testing. Will see how it goes Link to comment Share on other sites More sharing options...
jetspeedz Posted November 9, 2023 Author Share Posted November 9, 2023 Happy to report it is working well no issues at XMP 1 Link to comment Share on other sites More sharing options...
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