Question PC needs AC to play any game or else it will restart after 3-5 mins max

Dec 2, 2020
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Hello guys, what seems to be the problem? When I start to play a game , my pc restarts but when Im just doing some youtube or internet stuffs without AC, PC works fine. Any idea? First, i thought it was psu, but same thing happens when i bought new 1. Cpu thermal paste is also new.
 
Hello guys, what seems to be the problem? When I start to play a game , my pc restarts but when Im just doing some youtube or internet stuffs without AC, PC works fine. Any idea? First, i thought it was psu, but same thing happens when i bought new 1. Cpu thermal paste is also new.
Do you guys think its the gpu? Because when i play dota in the first few minutes , the fps is hardly going up for about 10-20 sec