Computer freezes and shuts down after a few seconds

[Korppufan]

This started happening after i bought more memory to my computer... this usually happens when i am playing overwatch and press tab to see scoreboard and then game might crash or the whole computer freezes and shuts down. it is really annoying and i have triend to make my video settings better but it still keeps happening... Any ideas how can i fix it

 

[Tradesman1]

Try raising DRAM voltage + 0.06, may be a compatibility issue, this may stabilize it