RAM issue?

[dandos23]

Hi everyone, I recently upgraded my old system to something a bit quicker after getting advice on here about what to get. Everything has been working fine for about a month, so I know it was all working together.
Yesterday, I did a windows update which required a restart. Since then the PC wont post or even make it past the DRAM check. I removed everything from the motherboard that wasn't required to get to the BIOS and it still did nothing. As a last resort I removed all but one stick of RAM and it worked, I got to the BIOS. Everything in there looked fine and only has the standard settings with nothing overclocked.
To cut a long story short, it will now only post if I have nothing in slots A1 and B1. I checked all 4 sticks of RAM and they all work fine so I don't think the issue is there. After a bit more searching it seems that I have bought some RAM that is not on the compatibility list for the motherboard. That said, it was all working fine for about a month. Could this be a compatibility issue or something else?

Corsair Vengeance EXPO 64GB (2X32GB) DDR5 PC5-4800040 6000MHz Dual Channel (I have two sets of this to give me 128GB)
Asus TUF GAMING X870-PLUS WIFI (Socket AM5) DDR5 ATX Motherboard
AMD Ryzen 9 9950X Sixteen Core 5.70GHz (Socket AM5) Processor

Any help will be greatly appreciated as I don't really want to spend more money on RAM unless I really need to (although I might be cheaper to replace the motherboard lol)

 

[dandos23]

If you lose one channel it can sometimes be a cooler mount issue, though it doesn't sound you moved the PC so I wouldn't expect anything to have shifted.

What speed does running 4 sticks of 32GB get you? It must be pretty darn slow. It can be tricky to get that much memory to work, did you try a full CMOS clear? Though, keep in mind that doing this can potentially impact your TPM and may break Windows Hello and/or disk encryption.

Compared to the old system it was quite a bit faster lol. I didn't actually look at the speed it was running at as it was working fine. I have done the CMOS clear and had to deal with the disk encryption after. When it stopped working, nothing had moved, so I don't feel it could be the CPU cooler (I could have course be wrong though). The way this started, after an update, makes me think that it might be a software/compatibility issue.

check for bent pins in the socket too if you dare.

I have looked and cant see any bent pins, my eyes are not what they used to be though. Although, it started after a windows update, I don't think that there will be any bent pins as it was all working before the update.

 

[dandos23]

I had heard that it can take a while to boot, but I am unaware of just how long. So, I have all 4 sticks in and have turned the pc on. I will see if it has posted by the time I get up tomorrow lol.