Hey Folks!
My partner suggesting posting about my issue here, so.. There we go.
For some reason my PC started being a d.ck in the middle of an Overwatch Match yesterday evening. It's still new'ish (built two months ago), has been used the same way every since then every day and never had a single issue - no changes.
What happened was that it froze mid-game (no sound, nothing), so I restarted it. It booted fine, I logged in, opened Firefox (wanted to resume my video), freeze. Restart, log in, desktop - freeze, restart, booting - freeze.
We tried booting windows from a USB key, changed several settings in the BIOS one by one, checked each RAM stick separately, tested the SSD on my partner's PC, switched the GPU for another one, replaced thermal paste, tried my partner's power supply,.. Nuffin. The furthest we got was by booting with Ubuntu instead - that one at least let us get back to opening Firefox a few times - and then of course freeze again. Yay.
The specs are..
Zenith Extreme for the MB
AMD Ryzen Threadripper 1900X
2 Corsair x8GB 3200Mhz DDR4
GTX 1060
Corsair RM650x
Running on Windows 10 Professional 64bit
BIOS Version 1003x64
I hope that's everything you might need!