Why does my computer restart itself while playing high end graphics games?

[irvinth]

The specs are the following :
* Windows 7 Ultimate 32 bit 6.1.7600 (x86)
* Gigabyte Motherboard GA X58A-UDR3
* CPU: Intel Core i7 980X 3.33 ghz 12 CPUS 6 cores
* GPU: ATI Radeon HD 5870
* BIOS: Award Modular BIOS v 6.00 PG
* KINGSTON 6GB RAM
* Seagate 1.3 TB of Hard Drive
* PSU: PC Power and Cooling 750 W
* Computer Case: HAF 922 (It has 5 fans 1 in front 1 backwards 1 on top 1 on bottom and 1 on side)

i need help because after half and hour of playing any game that requires high graphics my computer shut downs itself and restarts and i dont know what to do, i already cleaned the dust inside the case and checked every cable to see if they were bad.. it has directx11 already

 

[carnageX]

Check your temps (both CPU and GPU) while idle and while gaming.

Also, have you updated your drivers / CCC to the latest versions?

 

[irvinth]

i updated everything but still it restarts itself while playing i dont want to fry my cpu due to overheating :/

 

[carnageX]

Check your temps with HWMonitor.
CPUID - System & hardware benchmark, monitoring, reporting

Post your CPU / GPU temps (just posting a screenshot would be easiest) while idle (not running anything, just sitting there).

Then Play a game for a while and quit, and take a screenshot and post that as well.

 

[irvinth]

ok so here is the core temps before gaming

[/IMG]

and this is after playing for a while right before it shuts down

[/IMG]

 

[irvinth]

hey can some moderator aprove the images im uploading? its annoying sorry

 

[carnageX]

Would be faster to just host them somewhere like TinyPic, ImageShack, or Photobucket and post the link.

 

[irvinth]

there, its uploaded on top of my previous comment

 

[carnageX]

Your temps are high on your GPU. Did you clean out all of the dust from the card's fan? Are you in a ventilated room? What's the temp of the room your PC is in?