Games freeze while playing

[Kotkot]

Hi,
I'm a noob in the PC gaming world, but last fall I decided to build my own gaming machine, and I did.
I thought I've succeeded in doing so, until the machine started freezing while playing games.
Thinking the problem was the graphics card I've replaced it, but the problem still persists.

Any idea what is that all about? Thanks in advance

System Specs:

• CPU: Intel Core i7-875K Lynnfield 2.93GHz LGA 1156
• Motherboard: ASUS P7P55D-E Pro
• Memory: 8GB ([CORSAIR XMS3 6GB (3 x 2GB)] and [ADATA Gaming Series 2GB 240-Pin DDR3])
• Old graphics card: XFX Radeon HD 6870 1GB 256-bit GDDR5
• New graphics card: SAPPHIRE 11196-00-40G Radeon HD 7950 3GB 384-bit
• OS: MS Windows 7 64-bit
• Optical Drive: SAMSUNG Black 12X BD-ROM
• Hard Drive:Western Digital Cavier Black 1TB 64MB cache SATA 3.0
• PSU:COOLER MASTER GX Series RS750-ACAAE3-US 750W CPU
• Fanynatron K666 60mm 2 Ball

 

[Puppies04]

Could be a lot of things but start by uninstalling your GPU drivers and installing up to date ones.

 

[Jeffg010]

Do you have any Virus checkers running in the back ground or zonealarm? For hardware it could be memory or power supply going bad I would point toward more memory as when power supplies go bad you get more random reboots.

 

[Steltek]

Are you overclocking? If so, drop everything back to rated specs.

I'd burn a memtest86+ bootable ISO and test memory first. If the test detects a problem, test the memory modules independently one at a time until you find which one might be defective. I notice you are mixing manufacturers with your memory modules, so you might try pulling the ADATA modules to see if it makes a difference. You might also want to check the BIOS to ensure the modules are being properly detected and are being run at the correct voltages.

It probably wouldn't hurt to check your CPU temps as well. You might also download and run a hard disk diagnostic check to be sure it isn't a failing hard drive.

Do you have the most recent motherboard BIOS installed? If not, you might try updating the BIOS.

If you don't find anything wrong to this point, you might want to consider swapping out the power supply.