x670e Hero hard crashes with reboots

[Naekyr]

Hi,

Setup: 7950x, x670e hero, 32gb ddr5 with 2 sticks. I have two screens, one is a TV and my playstation 5 is also connected to the TV.

Im getting crashes whenever I do very specific things. These crashes are always the same - screen goes black and the PC reboots.

1) Screen 1 is on, but 2 is off, then I turn screen 2 on and PC crashes.

2) Screen 1 and 2 are both on, then I turn screen 2 off and PC crashes.

3) Screen 1 and 2 are both on, then I turn my Playstation 5 and switch TV's input to the PS5, PC instantly crashes.

4) Playing games with EasyAntiCheat, like Elden Ring - PC instantly crashes when booting game - this happens as well even if I only have screen 1 connected to the PC. I've also tried only with screen 2 connected, still crashes and I've replaced the GPU and still crashes.

Sometimes after the restart it refuses to post and won't even go into BIOS. I've seen q-code error 14, 45 and 0D

What is wrong? BIOS is latest 2007 version and all settings are default

Thanks

[Silent_Scone]

Hi @Naekyr 

Are you able to perform a clear CMOS via the rear IO panel? Then check with EXPO disabled to rule out overclocking instability. You're receiving stop codes at POST as the memory isn't stable enough to pass training.

[Naekyr]

I have done this yesterday actually, cleared the CMOS with the button on the I/O and then when it went to BIOS I set it to default. The RAM is set to default 4800mhz and all memory settings are on auto and EXPO is disabled.

Unfortunately the system is still crashing. About 10 minutes ago I also tried to see if extra voltage will help for the RAM, I set the RAM to 1.35v and left all other settings on auto and 4800mhz, EXPO disabled, but it still crashes. I also tried the CPU core voltage at 1.35v and SOC voltage at 1.25v, but pumping extra voltage isn't working, the system still crashes, whether everything is on auto settings or whether its manual voltages seems to make zero difference

I have also tried to run memory testing software, I run the windows memory diagnostic which couldn't find any issue and I've run TestMem for 4 hours straight and it couldnt find any error.

One interesting thing is when I'm in the BIOS, the BIOS reports the system as having 16gb RAM, but once Windows has booted, Windows shows it as 32GB RAM

[Silent_Scone]

1. Insert 1 DIMM into slot A2.

2. Reseat CPU and cooler whilst inspecting pin-pad and socket for any debris or damage, ensure for even mounting pressure.

3. Remove all devices from front and rear IO panel besides keyboard & mouse.

Retest stability.

Cinebench CR23 and Karhu RAM Test for recommendation.