CPU Upgrade Od error RAM issue - MEG X570 Ace Ryzen 9 5900XT Help please

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ericraymondsavo160002f0

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The Setup:
  • Motherboard: MSI MEG X570 ACE
  • CPU: AMD Ryzen 9 5900XT (Upgraded from 3900X)
  • RAM: 64GB Corsair Vengeance DDR4 (4x16GB, 3600MHz XMP)
  • Cooler: Arctic Liquid Freezer III 360
  • GPU: RTX 5070
  • Current BIOS: 7C35v1R (Latest stable "R" version)

    Hello everyone,

    Was on my Ryzen 9 3900X for years. I saw a 5900XT for sale. Checked MSI's X570 Ace webpage for compatibility and bios. It showed that the XT is compatible. So, I bought the XT.
    Imagine my dismay when on first boot there was nothing. No post. jus straight to OD error.
    It wasn't trying to post, so I couldn't get into bios.
  • I reduced my RAM to one stick in A2 and boom- booted. YAY me.
    Now, It boots A1/A2, but if I move the A1 RAM Stick to B2 and try A2/B2, I get the OD error.
    Yes, I waited to see if it would get passed it several times, and it did not after 5 min and 30 min.

    I updated the bios from P to R. Again, Boots to windows a1/a2 but not a2 b2. I enabled XMP. Boots a1/a2 and not a2b2.
  • I dropped the MHz to 3200 while keeping voltage around 1.35.

    I disabled TSME. Still getting the same issue.
    Do I try booting A1 B1    ? Or seeing if it will boot with one stick in B channels? I am at a loss and tired of failing at this.
    After looking for people having these issues, I read that mounting pressure from the Arctic III could be an issue. I tried loosening that too.
    I am down to trying to put a stick in b1 or b2 to see if it posts/boots and then going back to the 3900X to see if the issue persists.
    I am down to thinking it's either a defective IMC on the new 5900XT or a physical issue with the B-channel traces/socket on the motherboard.

    Does anyone know of specific MSI/AGESA quirks for the 5900XT or this board that could cause a hard lock on 0d despite these steps? Any help is appreciated.

    Honestly at the end of my rope with this one.
 
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First try the latest 7C35v1S1(Beta version) BIOS. It's always the first thing to try with any weird issues. Don't be afraid of "beta", they always leave the latest BIOS for older boards as a "forever beta", not because it's unstable, but to indicate that they don't want to provide support for it. If a board came out 5+ years ago and you see a beta as the latest version, usually you can/should update to that one.
 
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But didn't you update the BIOS right before putting in the new CPU? Or did you first leave it on the old BIOS? But yes, I would first try the BIOS, because it's quick and easy to try. If it doesn't help, fair enough. But you should always start with that easy thing.

You can of course also try slots B1 and then B2 with a single module. The slots have to work individually, otherwise, yes, there's something not quite right. PCB traces almost never go bad on their own, they are probably the most reliable thing on the whole board, unless you slip with a screwdriver and scratch the board or something. Most of the time it can have something to do with the contact between CPU and board.

Yes, it seems odd how, on AM4 with the CPU pins, and all pins being straight, there can be such a contact issue. But I've even seen cases where people just mounted a different cooler on AM4 and then had some issues afterwards. My theory is that the area around the CPU socket perhaps flexes a bit over the years, settling in to a certain physical state, and when that is disturbed enough by taking off the cooler and so on, the contact of certain pins to the socket might not be ideal anymore. That would explain some of such cases. As for how to improve the contact again, that's difficult to say when you don't know what's wrong, you can more or less only try loosening the cooler's mounting screws a bit, maybe more on the left than on the right (cause the right side has a lot of pins going to the contacts in the memory slots). I'm not even sure if this theory is correct, but it's my best guess for now, especially if you find that the B-channel gives problems in general.

So - PCB traces, highly unlikely, unless you spot visible scratches on the board. Contacts in the RAM slots, unlikely, unless you spot a hair or something in those slots. That only leaves the contact between CPU and board, or something else we haven't considered yet.
 
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If I have to be picky, the stick seems to support XMP 2.0 instead of AXMP which means the ram kit is not certified by AMD. (but i don't have the exact model name to check, i can be wrong)
It's usually not a problem but perhaps trying a different kit would be easier option comparing to board swapping now.
 
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