7950X System Not Posting

[BENBOBBY]

Hi,

I was using my PC this afternoon, not doing anything taxing, and it randomly stopped working - internal lights were on but monitor turned off and no response. No BSOD.

Then when I tried booting it up again it, it didnt even show the post screen. The internal lights are on and the fans spin, but apart from that just seems dead.

Looking at the QLED code display, it first shows code 15 (Pre-memory system agent initialization is started) for a few seconds, then shows code 13 (Pre-memory CPU initialization is started). And the QLED is glowing red, which according to the manual indicates a CPU problem.

I havent done much troubleshooting yet (other than removing the RAM sticks one by one) as I thought Id get people's opinion here first before stripping everything down unnecessarily. Does it seem like my CPU is dead? Its only a few months old and havent done any manual overclocking on it!

Many Thanks.


CPU: AMD Ryzen 9 7950X
COOLER: Noctua NH-U12A chromax.black
GPU: ASUS NVIDIA GeForce RTX 3090 24GB ROG OC Strix
RAM: G.SKILL Trident Z5 NEO RGB PC5 6000MHz 64GB CL32
SSD: Samsung 980 PRO SSD 2TB M.2 2280 PCIe Gen4 x2
PSU: Corsair CP-9020140-UK HX1200 1200 W 80+ Platinum
MOBO: ASUS ROG Crosshair X670E Hero (not sure which BIOS version)
OS: Windows 11 Pro
CASE: Cooler Master MasterCase SL600M Black
MONITOR: Samsung 34" Odyssey OLED G85SB 175Hz Ultrawide

 

[eddiew]

At this point in history, it has to be asked... can you pop the CPU out and just verify it hasn't burnt itself to death? Shouldn't be a question we ever ask, but the last 2 months have proven otherwise.

 

[Tetras]

I was using my PC this afternoon, not doing anything taxing, and it randomly stopped working - internal lights were on but monitor turned off and no response. No BSOD.

It hasn't been moved at all, right?

 

[zuludawn]

Had the same issue with mine (75950x3d) only it was the DDR5, only worked with one stick at first, then with only setting it from auto to 6400mhz

Apparantly theres loads of issues with motherboards posting with memory running over around 5200mhz, more chipset issue.

I managed to get 32gig work at 6400mhz, then did a Bios update and it wouldn't post, now will only post at 6200mhz.

Try Dram around 4200mhz set manually, worth a shot