PC randomly shuts off while gaming.

[FragzZ]

So while I'm gaming my pc randomly shuts off, and when I watch the minidumps it gives me 3 .sys errors like these:

I've tried to clean install my drivers, but it didn't help.

Specs:
Intel Core i5 3570k
ASrock extreme4 z77
Corsair h100i
Corsair Obsidian 750D
ASUS gtx 780ti
G.Skill 2x4gb (8gb) 1600mhz
Corsair RM850 Watt
Seagate 1TB HDD
Adata 120GB SSD
Samsung 250GB SSD

Greetings,

FragzZ

 

[JDobbsy1987]

Hi,

Please follow the BSOD Posting Instructions - http://www.sevenforums.com/bsod-help-support/96879-blue-screen-death-bsod-posting-instructions.html

Regards,
Jamie

 

[FragzZ]

EDIT: Also, my PC doesn't show any BSOD, it reboots.
Here it is:

 

[FragzZ]

Well, I built my older Mobo into my pc and the error is still there, I assume it's my GPU since my PSU is not over 48hrs old.