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5950x Not POSTing

oliwastaken

oliwastaken

oliwastaken

Associate
Joined
26 Nov 2020
Posts
16
Hi All,

I just received my 5950x yesterday but when I put it in my MoBo (an ASUS Crosshair VIII Formula, currently working with a 3600xt and running the latest BIOS, as of last night) it fails to POST.

The onboard screen shows POST code 32 which means "CPU Post-Memory Initialization", so I tried all combinations of memory in different slots and quantities which didn't help.

I'm hoping it's something stupid that I've overlooked as I hope I don't have to RMA it but if it's DOA I guess that's my only choice.

TIA
 
Thanks for all the replies!

With regards to the BIOS update, that is the version I installed last night.
And I'm only tightening the thumb screws until it is no longer moveable, same pressure I'm applying on my working 3600xt.

Any other ideas?
 
Everything in BIOS is default, no XMP/DOCP settings, the only thing I have changed is the monitoring of the CPU fan as the CPU fans are plugged into AIO.

I'll give it another try with barely any pressure on the thumb screws.
 
So, tightening it with barely a full turn and there's contact with the heat sink but it still wobbles, still nothing.

Could it be my RAM? It's not listed in the compatible RAM list for the 5950... I have 4x Corsair 16GB 3200 sticks (CMW32GX4M2C3200C16W). It's not old RAM so I guessed it wouldn't be a problem (I ordered the RAM a while ago to upgrade my old PC, and with the view to put it in this new build).
 
LtMatt said:
Does it post with only 1 or 2 sticks of ram? Deffo on the latest BIOS?
Click to expand...

Nope, Either error code 27 or 36, according to the manual both mean "CPU Post-Memory Initialization". And unless ASUS are shipping an old BIOS out under the latest tag I am on the latest, BIOS Version 2702, BIOS Date 2020/11/19

@RedTS What RAM are you using? And I guess you're also on 2702?
 
Interesting. Isn't the memory that RedTS mentioned built on Micron? Which would suggest it's not just Micron memory.

And sorry @faceman123 I missed your comment. Yes it's working with the 3600xt with this memory, I have some other Corsair 3000 sticks that I threw in to test with and that ended up with the same result.
 
Okay, I'll try 2311 and 2402 tomorrow, as I've already tried 2502 and I'm currently on 2702.

What memory did you manage to get it to post with? Guess I should get ready to maybe buy some more RAM in case it isn't the CPU or MoBo
 
Thanks everyone for all the replies, unfortunately none of them have fixed it :mad:

I tried 2311 and 2402 and neither POSTed, it was either Q code 27 or 36, which again both fall under the "CPU Post-Memory Initialization" message. Overclockers seemed OK with me holding onto the RMA for a little bit longer dependent on any potential BIOS updates from ASUS, but I don't know how long.

@Paradiso Do you have a link to the QVL for RAM, I only seem to be able to find the Overclocked Memory list.
 
Yeah I checked that when buying the MoBo, but I don't know if the memory is meant to be compatible with the CPU. I would have thought it is as it's currently working fine with my 3600xt.
 
Right, that's what I thought! But when my PC didn't POST and I started looking into what could be wrong, all the first responses to questions that match my problem say "Are you sure the RAM is compatible" (after the obvious "Are you on the latest BIOS")
 
Apologies for bumping this semi-old thread, but Overclockers received my RMA and confirmed that the CPU they sent me is actually functional on the Crosshair VIII Hero on the latest BIOS. So that leaves me with the options of; incompatible RAM, Differences in the Hero vs Formula BIOS, or maybe the motherboard is ******?

Can anyone who reads this and has a working 5950x CPU let me know what RAM they have running? Not what you've OC'd it to, what it should be off the shelf, so I can actually find it :)

Cheers!
 
tommoT.Striker said:
They might be different under the hood. I have seen corsair ram with the exact same product numbers but different chips, some samsung BDie, others from micron. To confirm it's best to check with Thaiphoon Burner. it sucks this even matters, but seems this is an issue with the BIOS for your board.
Click to expand...
Thanks for the suggestion, Thaiphoon says the DRAM Manufacturer is Samsung, while the JEDEC Raw Card Designer is Micron, So I'm not 100% sure who is the suspect party. I'll try 1 and 2 sticks again when I get the CPU back from Overclockers, see if the new BIOS helped any.
 
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