Question System unstable, but ok when gaming ?

[natcha12]

Have a bit of a weird one guys,

It started when I was still on Windows 10 last year with an i7-6700 CPU, with random restarts at intervals of between 5-30 min after booting up.

I thought what the heck, I'll upgrade to Windows 11 to see if it helps because of the upcoming security deadline anyway but it didn't help at all.

Then I tried a clean install, nada. Upgraded to a Ryzen 5800X with same ram sticks, nothing.
Two more clean installs later, turned on dummy power loading in BIOS as a shot in the dark too, still nothing.
I tried out Ryzen Master at some point but I wasn't making much use of the gains so reset everything.
The current OS install has not touched RM and has had CMOS cleared beforehand too.

All throughout this though, it absolutely never happened while gaming. I'm talking pc game pass, steam, ubisoft. Anything remotely taxing on my system seems to stabilise it...

I'm currently setting up a memory scan. I'm at a loss what to do next. I've left Space Engineers open in the background while my PC has been re-downloading my game library for 3 days and it's totally normal.

Please help me check my emails and the news in peace!

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Considering you performed an upgrade, we'll be seeing two sets of specs, one for before and one for after.

Where did you source the installer for the OS?

I wasn't making much use of the gains and reset everything
You're advised to reinstall the OS but in offline mode, manually installing all necessary drivers in an elevated command while in offline mode.

 

[natcha12]

Where did you source the installer for the OS?

I wasn't making much use of the gains and reset everything
You're advised to reinstall the OS but in offline mode, manually installing all necessary drivers in an elevated command while in offline mode.

I got the official win11 64 from the microsoft site. Not a recovery version, and not linked/customised for the current PC. I wanted nothing to do with my old setup software wise.

You have taken my sentence out of it's context of Ryzenmaster... I reset settings in the program itself, uninstalled it then cleared CMOS.

As requested
CPU: 5800x stock now (second hand), from i7 6700
CPU cooler: Noctua NH D15 dual 140mm, old cooler was some basic intel I don't have anymore
Motherboard: x570 Aorus, from B250N phoenix (both second hand)
Ram: Crucial 2x 8Gb
SSD/HDD: OS drive, WD blue SATA 500Gb
GPU: Zotac twin edge 4070
PSU: Either aerocool 750 or higher/corsair cx 750w. up to 8 years old
Chassis: Phanteks enthoo pro 2 server edition, 6x 140mm fan
OS: win 11 pro
Monitor: Samsung Neo QN90A tv

I have doubts it would be a driver issue. I can't easily and wouldn't want to try and repeat to confirm it, but on one of the total resets I do believe it restarted partway through Windows installation and subsequently failed. Wouldn't this mean it happens before any drivers were even installed?

Memtest86 came back clear after a default run earlier.
chkdsk on OS drive and sfc scans have found no errors, multiple runs.