[2022] R6E Crashing - random, maybe a few seconds after mission load, or 15 minutes or maybe 30 mins!

Ryzen 9 5900X
32GB 3200Mhz
RX 6800 XT XFX 16GB

Windows 11 Pro... clean installed 2 weeks ago.

I had a crash 14th August, first time I played after the recent update - whilst doing Maelstrom, in last round.
Rebooted into a solid colour LIGHT blue screen(not BSOD!, no error codes, no text nothing) with no cursor or input, had to unplug cable from tower and press power button 20s as Windows wouldn't come back to its senses.



Tried both AMD drivers 22.8.1 and 22.10 'May preview'. When game crashes, straight tabs back to Windows and then computer reboots itself.
Yesterday Ubisoft connect was showing an error.

Wonder if my card got fried, as now I'm getting these odd crashes constantly!

Anyone else?