overheating?

[konc3pt]

Every time i try to play exo zombies. I get about 10 or 15 mins in and then my computer totally shuts down. This is the third time i've tried it. All my drivers are up to date and i un installed and reinstalled the game. Seems to me maybe something is overheating in my machine seems to be the only explenation i can come up with.

I run cpu-z and gpu-z to monitor my hardware and my gpu temp seems pretty normal. (38-43c when idle) and my processor is liquid cooled. Both seem warm to the touch but nothing abnormal. Any ideas?

I don't think i have the same problem in multiplayer. I only tried it once since then so i don't have a real basis for comparisson. But I will try again in a little while to see if it does the same during multiplayer.

I built this machine about 3 years ago.
CPU: AMD FX-8150 Zambezi 3.6GHz Eight-Core Processor
MOBO: Crosshair V Formula w/Thunderbolt AM3+ AMD 990FX
RAM: 16 GB (4x4GB) G.Skill Sniper Series 1866 DDR3
GPU: Gigabyte Radeon 7970 GHz Edition 3GB 384-bit GDDR5
HDD: Seagate 1TB Internal HDD, Seagate 1.5TB External HDD
SSD: OCZ Vertex 4 256GB
DVD: LG BR/DVD/CD Burner w/ 3D playback
PS: Cooler Master Silent Pro Gold 1200W 12V ATX
Tower: Cooler Master HAF 932 Stell ATX Tower (Customized)
Cooling: Thermaltake Water 2.0 Extreme/ Rexflo 250mm/ CM 230MM(x2)/ Xigmatek 140 mm/ G.Skill Ram Fans/ Evercool pci fan/ Vantec HDD cooling system.
Mouse: EpicGear 7 Button Wheel Laser + Optical 6000dpi Meduza HDST
Keyboard: Microsoft Digital media pro keyboard
Mouse Pad: Control + Speed sided Rocketfish
Windows 7 Pro

I'm not as up to date with computers as i was some years ago. Any input from you techy nerds is appreciated