I got all my games to run in the end, while in the menu of each i changed to window mode and 2560x1440p, loaded a save and could play, then quickly changed back to 4k and hey presto no more CTD
A few of my most played games, 4k, settings ultra unless stated
Cyberpunk 2077 i seem to be around 5-7fps more than before, sitting around 97fps on the 9950x. (mix of ray tracing settings, frame gen off)
Horizion Forbidden West i seem to be around the same fps in all honesty but the game feels much better, dunno maybe the 0.1% lows are much better.
(high settings to get it to work, had shader compile issues initially)
Starfield as before a decent uplift, explored Akila City and the outskirts, getting a few dops to around 65fps in heavy crowd areas, but out in the wilds a lovley 120 - 130fps, and again the game just feels much smoother like Horizon (mix of ultra and high settings)
Destiny 2 same performance but thats due to the old game engine it uses, i upped the frame cap to 180fps from 144 and it was very close, a steady 172fps average. (graphics settings set to max)
The boot times are absolutely savage too on the 9950x and bios v2204, apart from changed to expo II and setting 6200mhz speed, i'm seeing 16.1s total boot time which is stupidly quick, my 7950x would take around 48s to get into windows before, its a very welcomed change