PC Crashing

[Fleelol]

I’ve been having a problem with my gaming PC for a few days now. After starting my PC up for the first time of the day (when the pc is cold), my PC would crash when it’s under load every time I was playing fortnite or assetto corsa and it usually shuts off in about 5-10 minutes, but then it works flawlessly after the one crash of the day (I.e it’s happened every time for the past 6 days).

The nature of the crashing is just it shuts down. No blue screen, but would freeze up making a looping sound in one segment of the audio till I switched off the PC. And then it would crash after even on the same game for the rest of the day.

This is my PC Specs: I7 10700k RTX 2060 MSI H410m-a 16GB DDR4 Ram @2113mhz Montech Air 100 Case EVGA 600Watt W1 80+ Bronze

I’ve already tested the CPU, GPU and Ram (I had a sneaking suspicion it was the ram but I was wrong as I used a different kit of ram but still didn’t make a difference the next day), I haven’t tested the mobo but I don’t think that would be the cause of the issue at hand, and the PSU, I have am quite sure that this might be the problem since evga W1 psu or any evga psu is a pile of crap I’ve heard.

What are your takes of the situation?