Question My pc keeps on crashing

[Jonaking]

My pc keeps on crashing after I installed a new graphics card which is the asus strix gtx 1050ti. Now to my question what is wrong. It crashes even if if I don’t launch any games after 10 minutes my monitor turns of and it restarts I need help
Thx

 

[Jonaking]

Ist it my power supply which is 230w or Ram. I only have 8 or do I need an ssd or smth like that