Z690 unify x issues

Jun 22, 2022
Hello , I recently bought an MSI Z690 Unify-X an i9-12900KS and a Gskill Z5 RGB 6400mhz cl32 kit. I updated the bios to (7D28vA3) to accommodate the 12900KS microcode. so far without worries. I activated XMP to benefit from the maximum performance of my ram. I encounter in games total freeze of the pc it is impossible to play more than 10 min… I would like to know what I can do, I'm lost. I see that there is a beta bios 7D28vA42 that could solve the problem? thank you .
Yes, you can try the beta BIOS version. But also note that you have pretty much the highest-end DDR5 kit that G.Skill offer at this time, with a very demanding XMP profile.
Yes, you also have one of the best board models to go with it, but DDR5-6400 CL32 is no joke on any board.

Carefully read this thread and follow the links in my reply there as well: https://forum-en.msi.com/index.php?...roblem-possible-solution.376161/#post-2130188

Now, i say there that DDR5-6400 is causing loads of problems on four-DIMM boards (having four RAM slots), because even the two empty slots cause a signal degradation.
But even on your high-end two-DIMM board, it's not a given that it "just works". And the IMC (integrated memory controller of your CPU) is also a factor.

On your board's specification page, it says:
Max. overclocking frequency:
1DPC 1R Max speed up to 6800+ MHz
1DPC 2R Max speed up to 5600+ MHz

So with 1R = single-rank memory (which i think your kit consists of), their in-house overclockers, using hand-selected high-end DDR5 RAM, couldn't achieve more than DDR5-6800. Otherwise they would have advertised with that. So a mere 400 MHz above your XMP profile is the limit that professional overclockers couldn't even surpass. Maybe now you have an appreciation of how demanding a DDR5-6400 XMP profile actually is. It might require some manual intervention, raising voltages or whatever, to even work. Or you may have to back down slightly on the frequency, like the person in the thread i linked, to achieve full stability. XMP is never guaranteed, it's just a goal that can be achieved under ideal circumstances.
you need to tweak it to get it stable at that speed.
And some cpu memory controllers wont reach that speed

there is an thread on the overclock forum, that is about ddr5 Alderlake overclocking (XMP is also overclocking).
And this board is also well used there,would look there for settings and also compare.

only advice, be carefull with high voltages,some users are using really high voltages.
thank you very much for your precise and quick answers, it's very kind of you, I was waiting for the MSI email before giving you an answer. they sent me a link for the compatibility memoir for the z690 unify-x .
my serial number didn't show any results
So I guess I made a mistake and that's why my. machine freeze in games. However, I have a question, I found a kit in the compatibility list
F5-6400J3239G16GX2-TZ5S and the link where i can buy a one

do you think this will solve my issues ?(only in silver found on the compatibility list when i choose black color i can’t find de number series on the list ) Thank you
Last edited:
No, i don't think it will solve your issues. Because except the RGB vs. non-RGB, they are exactly the same modules underneath. There is just one type of hardware that allows this high speed and low timings, and they use the same hardware for both kits, just with a different heatspreader on top of it.

F5-6400J3239G16GX2-TZ5RK has RGB
F5-6400J3239G16GX2-TZ5S has no RGB and is silver
Otherwise identical, as usual with G.Skill. So you can just search the QVL for the first part "F5-6400J3239G16GX2-TZ5" and it will apply to all variants of it.

Even if they were different underneath, the QVL is not "either-or", it just means that the RAM that's listed on there was tested for sure, but it doesn't many any RAM that's not on the list is incompatible. On the contrary, a lot of other RAM will also work fine.

But you have a more general problem in that this RAM has a very high-end XMP profile that's scraping at the limit of what is possible with current DDR5 technology.
At this level, you are never guaranteed that everything works problem-free. Even if it is on the QVL, your CPU's memory controller is different from theirs. For any slower RAM, this wouldn't matter much.
But you are at the pinnacle of this technology with your RAM, and it just won't work everytime. Maybe they will improve this with further BIOS versions, but for now, i would suggest something else.

Load the XMP profile, but before pressing F10 to save & reboot, set "DRAM Frequency" manually to something lower. See if DDR5-6200 works. If not, try DDR5-6000, still with XMP enabled.
This might work and you don't have to buy anything new. Then once a new BIOS version comes out, you can try again with XMP DDR5-6400. It may work one day, or it may never work.
i can also add something here...i have tryed a 6400 kit on the godlike and its a no go unless a mess with volts a 6000 kit works with xmp and no manual changes. so id say 6000 unless you want to play with volts to get it stable.
Hello everyone thanks for all for your answers I updated to the bios (7D28vA4) and I was able to play a little more than 2 hours yesterday without problem and today a little more than 2 hours also without problem with XMP 6400mhz cl32 I think the new bios to correct my problem before I could not play more than 10 min, I had freezes in the menu even before looking for a lobby sometimes.I'm going to play more and different games and I'll let you know .
Last edited:
Run some RAM-specific stress tests. Waiting for crashes is not a good way to judge stability. See my RAM thread under 5) where i list good RAM-testing tools like TM5 or Linpack Xtreme.
@Klementiefperrin12cb02b2 any chance you can post sticker of the memory?
Yes i can show u my ram stickers I will take it in the afternoon. but how could that help?
Lets them know what type of memory and what brand of Memory chip weather Micron Samsung or other.

Some user in the Forums work in Computer hard ware and have more PC crap than you can poke a stick at. And if they have a set of matching ram they can see if they get same problem.
Well, we already had that info, you said you have the F5-6400J3239G16GX2-TZ5RK, so let's see what additional info Alan wants to get out of the sticker ;)

Anyway, as i said, i would run some RAM stability tests like Linpack Xtreme and TM5 now, see my RAM thread.
Yes, that looks good. Now let it run the three passes/cycles, it should take a while. I normaly use the 1usmus_v3 config, but the anta777 config is ok too.