Question PC freezes and automatically restarts while playing

[cAf]

I built this rig around one and a half months ago, and from the first days I had this problem, but it would happen very occasionally. But for the past week or so, it would happen even 2-3 times in a 10 minutes period. I mainly play CS:GO and I thought it was a game-related problem, but it happened while playing other games too.

PC specs:
Ryzen 3600
AMD RX 5500XT
Corsaire Vegance 2x8gb 3000mhz
Gigabyte B450D DS3H (BIOS version F50)
Thermaltake Smart SE2 500W
Kingston 480gb SSD
CoolerMaster MasterLiquid Lite 120

Solutions I've already tried:

• Stress test for CPU, GPU, and RAM to see if it would crash, or if it was a PSU power output problem
• Reinstalled Windows + sfc /scannow etc etc
• Try one RAM at the time.
• Installed all drivers for CPU, GPU

Temps are fine even in stress mode. CPU around 67 and GPU around 60-65 degrees Celcius.
I didn't try MemTest yet, but I don't think it could be a RAM problem since I've swapped them already. I also had do disable the XMP profile since it would crash windows at startup.

If anyone has an idea of what could be wrong with my rig please help me out, because I'm going crazy with those crashes.

Thank you for your time!

 

[Psycho Alert]

What's your PSU?

 

[cAf]

What's your PSU?

Oh, sorry I forgot to add it to the list. It's a Thermaltake Smart SE2 500W