My pc restarts when I hit "Loading state" in CSGO

[Mikkelbang]

Hello guys.

Setup:
Case: Corsair Carbide 330R Blackout Edition
GPU: Sapphire Radeon R9 390 Nitro 8 GB GDDR5
CPU: Intel I5 6600k 3,5 GHz Skylake, Akasa fan
Memory: Corsair Vengeance LPX DDR4 2133 MHz *2
MOBO: Gigabyte GA Z170 Gaming K3
Storage:111GB INTEL SSDSC2CW120A3 (SSD)
223GB KINGSTON SV300S37A240G (SSD)
PSU: Power LC1050 (1050 W)

My problem is that my pc just random restarts without any warning, not even on the desktop when I am loading CSGO. As soon as it starts to load the map it just restarts. I have had this problem since my pc was built. If I play other games, there are no issues, tried high-end games, other low graphic games, without any issues.

I have tried this so far:
Memtest
Furmark
Clean install of OS (W10)
Checked cables and hardware
Help from friends
Used different hardware

I am really clueless on this issue. If I check windows log, I only have some normal errors such as ID 56, 7031, 10016 and 6008.
Got 1 critical though ID 41.
I've spent at least 50 hours reading articles about this and none of them have helped so far. I am really about to give up, so I'm giving my last shot to you guys. I really hope you guys can help me.

Update: Tried Prime95, no errors, all tests passed.

Sincerly
A pc noob in desperate need of help.

 

[mubin]

Hey, did you try steam repair? Verify integrity of game cache? Its in game properties in steam.

 

[Mikkelbang]

Hello Mubin
Yes I have already tried that. Tried most things.