5200mhz Ddr5

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Aug 3, 2024, 5:13:50 PM8/3/24

to keyrarohe

I'm experiencing issues with running 128GB DDR5 with XMP at 5200MHz and need some advice. I originally built my PC with only 2x32GB Corsair Dominator at 5200MHz, and everything was running smoothly. I saw that the prices of memory went down so I just purchased an additional 2 sticks of ram. After installation, my PC was unstable at 5200MHz. Turning off XMP makes my computer stable, but it only runs at 4000MHz. I am able to turn on XMP but set the frequency to 4800 (haven't tried 5000) and so far it seems stable. I've researched this a bit and see that DDDR5 in the Z690 generation is really not able to handle all four slots with XMP turned on, which is very unfortunate.

Thank you for your reply. My use case doesn't necessarily require the extra memory either, which is why I'm in this debate. I wanted to fill up the DIMM slots because I wanted to run it at the maximum potential and because the four dominator sticks look so freaking nice.

I changed the speed from 4800MHz to 5000MHz at the default XMP I profile and everything seems to be okay, at least for now. So idk, do I return the sticks and run 64GB@5200MHz or keep the 128GB@5000MHz (if its stable)?

For general gaming and productivity you will never need 128GB, in my opinion you should run the 2 slots as fast as you can. And hope that Corsair releases a Lighting Enhancement Kit for DDR5 Dominators to fill the extra slots.

I attempted to run 4x16GB Dominator DDR5-6200 CL36 and wasn't able to get speeds even close to 6200. So I cut my loses and returned 2 of them. If there is BIOS update that suddenly makes 4 sticks easily stable then maybe ill buy them back. But for purely gaming, I have more then enough ram to keep my FPS above 144.

With two DIMMs (one stick per channel on a motherboard that has two slots per channel, 4 total), the nominal speed is not 4800 but 4400mhz. That in turn lowers the maximum XMP frequency you can achieve.

Personally i'd run only two sticks as much as possible, unless i happened to need lots of ram. That's purely for cooling purposes. 4 sticks don't cool as well. I don't know how it goes with DDR5, having the voltage regulation on the stick instead of the motherboard.

I simply configured the BIOS to XMP II and the two kits totaling 128GB of DDR5 RAM are running stable at 5200Mhz. I tested my system with Passmark PerformanceTest and I'm super happy with the results out-of-the-box as I didn't need to heavily tweak OC or anything, see the baseline for my new build here:

I loved that I could reach top performance out of the box without doing almost anything. I think I could probably OC the RAM way higher. The two kits DDR4 dominators on my first build were OC-ed to 4800Mhz stable while their official rating was 3600Mhz.

What I am saying here is, always start clean by resetting the CMOS and make the changes that last worked for you. Making changes rebooting and undoing to other changes may leave the BIOS unstable and misleading you to believe that some settings don't work or are unstable.

After updating BIOS, it was stable...for a few days. Now its back to being unstable. Going to return the two sticks and leave it at 64GB. Very sad that I'm unable to use my CPU and memory to it's maximum potential, but 64GB is still plenty.

I have a 13900k on a Z690 hero board with 64gb ddr5 at 5600mhz. When I add the other kit to make 128gb, the best I get stable is 4000mhz. Anything over that is totally unstable, fails memtest86 within 10mins. Oh I have the latest bios, latest me drivers & me firmware, also all the latest Asus drivers (lan, data, etc)

In order to optimize this build, that was very stable...Though RAM was running @ 4800 Mhz and not at its full rated potential. I therefore updated the BIOS to the latest version (V. 0809) including ME update as explained on Asus Website, before enabling XMP to get my RAM running @ 6400 Mhz as rated by G.Skill ! and It worked out perfectly.

As ASUS Prime Z790-A WiFi MoBo is ready to support DDR5 up to 128 GB of RAM cadenced @ 7200 Mhz max with compliant sticks, I decided to get a second kit of G.Skill Trident F5-6400J3239G32GX2-TZ5R.....PC was no longer booting and end up in a Windows repair loop...It took ages to POST as it needs to evaluate RAM and 128 Gb takes quite a while....Then appeared a black screen or PC was freezing while loading windows to end up with BSOD's.... To get out of this situation, my only way out was to power OFF and clear CMOS that by default disabled XMP !

I tried these different sequences 1.40000v, 1.40500v, 1.41000v, 1.41500v, 1.42000v, 1.42500v, 1.43000v, 1.43500 v, (VDD & VDDQ voltages) and PMIC setting to value "By per PMIC"...taking care between each of these to Power Off PC, Clear CMOS, Reboot, Repair and Log on Windows then Restart to enter BIOS and enter next sequence settings enabling XMP and attempt to boot... Unfortunately none of this did the trick....I would not even try to decrease RAM speed to see the result as this is pretty frustrating enough to end up in this situation where ASUS & Intel clients are no less than guinea pigs...We are just good enough to perform the remaining tests that should have been undertaken by manufacturers before releasing these overclocking features !!! Very disappointed in the end considering the price of this computing gear....

Should anyone hear anything about progress on these DDR5 MoBo / XMP issue Please share it ! as I do not want to return one of the memory kit to wait for a resolution and take the risk that G.Skill Trident F5-6400J3239G32GX2-TZ5RK would no longer be available on the market !