I recently built my first gaming computer. After about 3 days of use it began to randomly restart. While playing games and while just simply browsing the internet. I checked to see if the CPU or graphics card overheated but it didn't seem to be that either. I restarted windows 10 and deleted everything and the problem still continues. Some days I'll play for 4+ hours and it won't restart but other days I can be on for 10 minutes and it'll randomly restart. I have also updated all drivers. I am not overclocking.
Specs:
EVGA GeForce GTX 970 04G-P4-2978-KR 4GB FTW GAMING w/ACX 2.0, Silent Cooling Graphics Card
CORSAIR RMx RM750X 750W ATX12V / EPS12V 80 PLUS GOLD
AMD FX-8350 Black Edition Vishera 8-Core 4.0 GHz (4.2 GHz Turbo) Socket AM3+ 125W FD8350FRHKBOX Desktop Processor
GIGABYTE GA-990FXA-UD5 R5 (rev. 1.0) AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
HyperX Fury Black Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600
Specs:
EVGA GeForce GTX 970 04G-P4-2978-KR 4GB FTW GAMING w/ACX 2.0, Silent Cooling Graphics Card
CORSAIR RMx RM750X 750W ATX12V / EPS12V 80 PLUS GOLD
AMD FX-8350 Black Edition Vishera 8-Core 4.0 GHz (4.2 GHz Turbo) Socket AM3+ 125W FD8350FRHKBOX Desktop Processor
GIGABYTE GA-990FXA-UD5 R5 (rev. 1.0) AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
HyperX Fury Black Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600