Question Computer instantly shutdown while playing

[Industryy]

Hello guys recently my sister's computer sometime shutdown instantatly while playing on "FiveM",
i've tried to do some test with OCCT on the CPU and the RAM but no errors found and everything had running fine.
The temps on the CG and even on the CPU are super fine so i do not think it come from there, it only happens
when she was playing only, i've tried to clean the pc, defragmented the disks.

I've no more tracks for now, maybe gonna try to update the CG driver, so you guys what do you think can you help me out ?

Thanks.

 

[rgd1101]

full system spec? include brand and model of the psu

 

[Industryy]

GC : Nvidia 1070TI
CPU : R5 5600G
PSU : Corsair RM850e
RAM : Corsair Vengeance RGB Pro Go/ DDR4 3200
OS : W11