1. What is the make and model of the PSU?
Members will check it's a famous multiple rail model.
2. Let's see a Web Speccy so I can check for some malware and more.
Read how at https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
I am going mad trying to figure out why my computer locks up. It only happens when I'm gaming; sometimes 5 minutes, sometimes 4 hours in, and it doesn't seem to be all games - but again I can't find a pattern. For example low graphics setting LoL or WoW can cause it to freeze, but sometimes i can play Dynasty Warriors 8 on high and it won't.
What I've done:
Checked sound and video Drivers.
Ran Memory test
Avast and Malwarbytes full sweeps
Cleaned and defraged disks
Cleaned with compressed air
Specs:
CPU: Intel(R) Core™ Processor i7-6700K 4.00GHZ 8MB Intel Smart Cache
FAN: Asetek 550LC 120mm Liquid Cooling CPU Cooler - Extreme Cooling
Performance (Single Standard 120MM Fan)
HDD: 240GB SanDisk Z410 SSD + 2TB SATA III Hard Drive Combo (Combo Drive)
MEMORY: 16GB (8GBx2) DDR4/2800MHz Dual Channel Memory (ADATA XPG Z1)
MOTHERBOARD: GIGABYTE G1.Sniper Z170 SLI ATX w/ USB 3.1, 3 PCIe x16, 2
PCIe x1, 3 SATA Express, 6 SATA3, 1 Ultra M.2
OS: Windows 10 Home (64-bit Edition)
OVERCLOCK: No Overclocking
POWERSUPPLY: 600 Watts - Standard 80 Plus Certified Power Supply -
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
VIDEO: GeForce(R) GTX 1070 8GB GDDR5 (Pascal)[VR Ready] (Single Card)
Any additional suggestions or idea would be much appreciated. Thanks.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic