Computer is crashing

Hello, I have been having an issue where my computer crashes while playing games (L4D, Borderlands) after only about 10 - 15 minutes of playing. When it crashes my screen starts displaying no signal and I cannot turn off or restart my computer using the power buttons. I have to turn off the computer using the power supply.

I originally thought this problem was caused from my video card over heating. I tried using rivatuner to increase the fan speed but it did not help. I ended up buying a new video card, Sapphire radeon 5770, and I am still having the same problem.

I have done a windows memory test and everything seems to check out, the new card is not overheating either. I have reinstalled drivers and cannot think of anything else to do. Can anyone help?



Motherboard: GA-880GM-UD2H AM3 AMD 880G HDMI Micro ATX AMD Motherboard
Ram: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM
CPU: AMD Athlon II X4 640 Propus 3.0GHz
Video Card: Sapphire Radeon HD 5770

I also have 3 harddrives connected​

 

Will it Crash when Not Playing games ? When just using it normal ?Do you have the processor overclocked ?

 

It seems to run fine normally and does not crash. Nothing is overclocked.

 

Also, I have noticed that I need to manually change my memory timing settings from my MB default 9,9,924 to 8,8,824 . I have done this before and still have the same problem with either setting. However my motherboards default voltage for the ram is 1.6 and my G.skill calls for a voltage of 1.5. My motherboard only gives me an option to increase this voltage and I have no way of lowering it to what the ram desires.

 

Hello,

If you are running your RAM at a higher voltage than the manufacturer recommends, you can run into stability issues. This is one method of overclocking RAM, by increasing its frequency/voltage. Not all ram can overclock without issues, I would try to install some RAM that is rated for the voltage that your motherboard uses as instable ram can cause crashes and lockups.