Random game crashed with several games

[Chedda7]

I put together a HTPC/Gaming rig about a week ago and just got around to throwing some games on it the other day. I have only installed Supreme Commander 2 and Crysis so far but I am having problems with both. I will get random game crashes between 3 and 90 minutes into a game and very generic errors. Sometimes they make reference to C++(SupCom 2), but mostly they just crash without a reason why. A few times with SupCom 2 I had to actually had to hard shutdown as CTRL-ALT-DEL wasn't working. Every other time I was able to end the task though. Here is my hardware:

AMD Athlon II x3 450 (Stock Clock)
XFX Radeon 5770 1GB (OCed to 900/1325)
Biostar TA785G3+ MoBo
4GB of PNY 1333 RAM CAS9
WD Green 1TB 5400rpm
Windows 7 Ultimate 64 bit
All this in a Silverstone SUGO 02 and playing on a 46" HDTV

CCC says I have the following driver(most up to date that I know of): 8.821-110126a-112964C-ATI

I have DirectX11 and have run "dxdiag" and everything checked out. At first I had the 5770 at all stock settings and this problem was still occurring so I figured what the hell and over clocked it. It didnt change anything. I manually set the fan on the 5770 to 85% to make sure it was not over heating and it made no difference. I have an after market cooler on the CPU and have run prime95 on it with no heat issues. I am playing these through steam if that makes any difference. Any advice you guys have is greatly appreciated! Also if you need additional information about my setup please ask.

Thanks.

 

[BoomerD]

Try backing down the o/c on the video card. See if that helps.

What do you have for a power supply?

 

[Chedda7]

Okay, I will try backing the OC down. I have a Corsair CX430 power supply. Thanks for the tip.

 

[Chedda7]

Okay so I backed down the OC on the GPU to 880/1285 and it crashed about 20 minutes into SupCom 2... I am really at wits end with this one.

 

[mlc]

I would try the following

1) reinstall the graphics drivers.. as they my be corrupt
2) remove the overclock completely .. if you havent done so already.. (done reduce it, remove it)
3) try running a program to stress test your graphics card to check the temps.. and to rule out an issue with steam

 

[Chedda7]

I reinstalled the graphics drivers...I thought that I had found the issue when my game crashed after about 90 minutes . I decided to run prime95 again because I have done everything I can to this graphics card short of getting a new one. On blend test my 3rrd core fails fairly quickly (15 min). I ran prime on sfft and it crashed after about 1 hour. Now I am going to run memtest to see if its the RAM or CPU.....