Question Need help with lots of crashed on my PC - Dark Hero / 5900x

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Asryan

Reputable
Feb 20, 2019
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4,585
Hi, I'm having lots of issues with my rig since few weeks :

To provide all infos :
The pc was mounted more than a year ago and after lots of hours of testing and stressing it was all fine for a year. No issue whatsoever. Only thing i've changed recently is the AIO, went for a Ryujin 2. Temps are good, 75c on CB20/23 and between 50 and 70c while gaming depending on how CPU intense the game is.

System Configuration/Specifications -
1.CPU : 5900x
2.Motherboard : Dark Hero VIII
3.UEFI/BIOS version : 3801
4.DRAM/RAM : Gskill trident neo 3600 / 32gb (8x4)
Graphics Card : Asus strix 3090
Power Supply Seasonic Prime Ultra 1000 titanium
Storage device ( SSD/HDD ) : NVME : Sabrent SSD 1TB Rocket Nvme
SSD: Samsung EVO 850 - 250Go + Samsung EVO 850 - 500Go

My issues started few weeks ago :

I remember I had a small issue when installing a fan I pressed the "safe boot" button by error. I booted into bios but mouse wasn't reponding so I forced shutdown and i had some issues then, when using retry button it booted normally.

Few days after, at f irst it was QCode 00 two times, one time during gaming, one time on a spreadsheet.
I read that an overtight cpu cooler could cause this, i've loosen it a bit and no Qcode anymore.

But :

Last week while gaming , WHEA error 18
A fatal hardware error has occurred.
reported by component processor core
Error source : Machine Check Exception
Error type : Cache Hierarchy Error
ID APIC du processeur : 4

What i did:
I tweaked curve optimiser on core 2, went from -30 to -20 thinking some windows update or maybe just time made my OC a bit less stable

And now yesterday

First crash : Screen went black, sounds was choped off but still working f but pc was running as nothing happened. I had to shutdown it by the psu.
Nothing in event manager or in reliability monitor except than an expected restart.

Second crash

Few moments later PC restarted when i plugued a external drive to a usb c extender which is plugued in the back of the tower. Screen went black and one of the PCIE of the GPU was flashing. I had to force shutdown

What i did at this moment :
Reinstall GPU with DDU
Disabled all CPU overclock in bios
went back to stock power plan (i was using custom by usmus)

All seemed fine but few hours later while working, Pc became very slow. Start menu was poping but nothing was responding in it, web page were not loading..
I forced the shut down, restarted and the pc turned itself off when it booted to windows. I rebooted again but it was fine .

What I could do?
use the clear Cmos button?
Upgrade Bios to 4006 (heard 4201 wasn't good?)
reinstall windows ?
go back to stock cables instead of cablemods?
memtest?

It's annoying me like hell i'm just losing all will to play, it's also a pain to work on my laptop when i'm remote..

Thanks for the help