I have just had the same issue, was playing rust, thought it was a power outtage or fluctuation as the system died, now won't boot, hits code 90 and freezes. Have tried clear cmos and breadboarding it.
About to pull my cpu and try q flash +
3800x
Corsair h150i pro
Aorus master x570
Trident z Royal 2x 16GB 3200
Msi gaming x 1080ti
Samsung 970 evo 1tb nvme
Corsair r750i