Pc keeps shutting off

[plasticlove]

Hi my pc keeps shutting off when i play games like black desert online or apex

 

Specs

Mobo - b550m-a prime

Gpu - inno3d 3080

Cpu - ryzen 5 5600x

Ram - vengence corsair 8x2 16g 3600mhz

Psu - 750w 80+ silverstone st75f gold rated

Cooler - mirage 240

 

Everything is new and less than a month old

 

My temps are around 

Gpu - 70-80

Cpu - 60-70

 

Ive been having this problem for a week and send it back to the shop where they found no issues but when i got it back my pc still shuts off so any help would be much appreciated

 

Ive tried 2 different wall sockets with and without extensions so im literally out of ideas

 

The picture shows that the rgb rams still light up but everything else is offed