getting Z890 tomahawk to run mem at spec - need help

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msimembe158002e0

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Board is Z890 MAG tomahawk wifi, BIOS 7E32v1A5 (ucode version 0x113)
CPU is ultra 7 265k
mem is 2x16GB Corsair Vengeance RGB, rated at ddr5-6400CL36: Corsair number CMH32GX5M2N6400C36. Installed in A2+B2 slot.
OS is Win 11 24H2, updated to latest.

For the life of me I can't get the system to stabilize for more than an hour with XMP enabled - always freeze or BSOD. From what I read, the "N" in this Corsair number is really only for newegg special, it uses the same Micron B-die as CMH32GX5M2B6400C36, which is listed as supported. XMP disabled seems stable, although it's running at the JEDEC speed (4800 CL40) with lower volt(1.10v)

What am I missing here? given its "compatible" status I don't think expecting these rams to run at 6400 is too ambitious...
 
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I would open a ticket with MSI. Yes, the XMP of this kit is not that outragous, shouldn't be this difficult to run. But you know how it is with new platforms, at the beginning, not everything might run smoothly yet.
 
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I have the same issue with Patriot Extreme5 RGB 7600 will only run at 5600MHz, none of the other options in BIOS will BOOT. opened a ticket myself, fingers crossed there's a fix coming.
UPDATE: got a response, told me to try 1 stick at a time in the slots, they did XMP without issue. so waiting for the next response.
 
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Sean.l.clar156102e5 said:
I have the same issue with Patriot Extreme5 RGB 7600 will only run at 5600MHz, none of the other options in BIOS will BOOT. opened a ticket myself, fingers crossed there's a fix coming.
UPDATE: got a response, told me to try 1 stick at a time in the slots, they did XMP without issue. so waiting for the next response.
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I have this same memory running at 8400 cl40, 8200 cl38 with the latest bios. The memory performance has changed a little between bios versions. I always use the latest bios version.
 
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Sean.l.clar156102e5 said:
Could you tell me what settings you changed from default to make that happen, I have 1.A60 BIOS. thanks for your response.
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FYI,
Hello

This motherboard does not support this memory https://www.msi.com/Motherboard/MAG-Z890-TOMAHAWK-WIFI/support#mem

We cannot troubleshoot compatibility issues. We can only recommend to purchase memory we have tested to work at that speed. We have tested up to 9200 but it sounds like the board does not like the memory you chose for XMP/Overclcoking

Regards
MSI Support
 
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Sean.l.clar156102e5 said:
FYI,
Hello

This motherboard does not support this memory https://www.msi.com/Motherboard/MAG-Z890-TOMAHAWK-WIFI/support#mem

We cannot troubleshoot compatibility issues. We can only recommend to purchase memory we have tested to work at that speed. We have tested up to 9200 but it sounds like the board does not like the memory you chose for XMP/Overclcoking

Regards
MSI Support
Click to expand...
I don't know whether to return and replace with something else, or hope that it finally gets supported, any thoughts out there?
 
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Sean.l.clar156102e5 said:
I don't know whether to return and replace with something else, or hope that it finally gets supported, any thoughts out there?
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I see more posts related to memory booting and XMP stability issues than anything else. For example, over on the new AMD X870 platform forums, people are going through the exact same issues…and worse. It‘s just one of those things you risk running into with new tech. However, I do see forum posts where users do eventually get their memory settled down after one or more BIOS updates. But that could take many many months. And sometimes it never gets fixed. DDR5 is still relatively new and it’s still a crapshoot as to whether your combination of CPU, motherboard and DDR5 kit will ever find a happy marriage, especially at XMP speeds and timings.

My best and only advice is to visit forums like this and overclock.net and see what kits are already working well for users of your motherboard. Then cross-reference those kits with both your motherboard’s QVL list and the memory manufacturer‘s QVL (e.g. G.Skill’s). It won’t guarantee success, but it will help to increase your chances of success. Another approach is to play with CPU and DIMM voltages and hope you find the magic mix. But that’s exceedingly difficult for most users (even experienced users) to do well and do safely.

My advice: Either return the memory (if you can), sell it, or be prepared to put it on the shelf for a while. Then go looking for a new kit using the method described above. I hope that helps you solve your dilemma.
 
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FlyingScot said:
As a follow up point, it might be worth a shot to try the MSI Memory Try It! feature.
see recent thread https://forum-en.msi.com/index.php?...si-mag-z790-tomahawk-wifi.407921/post-2308376
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Thanks for the link, what's curious to me is if my RAM will work as a 1 stick, would it make sense that a simple tweak would allow for 2 sticks? I'm leaning on the idea that it's something deeper in the BIOS. I'm leaning on replacing with something listed on their website, I assumed that if they listed one version of RAM a faster version of the same line would be supported sooner or later, but MSI states they won't troubleshoot. I'm going to look around the web for a process to step into OC'ing RAM in the BIOS and see if I can figure it out. I thought that new BIOS had it fully automated now.
 
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