PC SHUTS OFF RANDOMLY

[Cloudpleb]

System Specs:

B450 Gaming- F (Switched from B350 Gaming- F just in case it was motherboard issue) 

ryzen 3900x (NXZT X62 Kraken AIO)

Trident Z RBG 32GB Ram (2 sticks are 3200mhz, and other 2 are 3000mhz) XMP enabled 

MSI Trio 2080 TI

850 evo 500GB SSD

850 watt gold certified PSU( brand new) 

 

I have tried almost every combination, Switched to a brand new PSU, tried stock cooler for CPU (previously used AIO cooler), switched graphics card, and tried booting with one ram stick only. I'm running out of options. I played Left 4 Dead for about an Hour , once I switched to Rainbow Siege it shut off randomly. Sometimes it shuts off without any game running, then it gets stuck on infinite loop. 

 

I'm wondering if I messed up something in the bios. 

[bmx6454]

does anything useful show up in eventviewer after the shutdowns?