New build crashes when starting games

Hi, i recently finished building my first comp. I used my old hard drive, and installed XP over it, so I could still keep the majority of my files with my new build.

My problem is, whenever I try to start up CoD2 or CoH: opposing fronts, my computer crashes and goes to the blue screen. These 2 games are the only 2 retail games I have tried. 3dMark also crashes my system in the same manor.

I often play an open source, free RTS game which uses OpenGL, which runs perfectly fine.

I feel this may be a result from installing XP over my old XP, leaving some drivers behind.

My specs:
e6750
en8800gt
IP35 pro mobo
2gb corsair twinx ram
corsair 520hx PSU

Does anyone have any suggestions as to what I can do?

I installed all of the new drivers after I re-installed XP. Im thinking it is a DX9 issue, because it only happens when I run directx games.

I've only found sites which say it has DX10 support and OpenGL 2.0. I haven't found anything about incompatibilities, so I'll keep searching.

Yes, all of them ran fine.

It could be unstable do to RAM errors and RAM timings. Do what PCKid777 suggested and also try removing all but one stick of RAM, because it could be one stick gone bad. I had a hardware failure lastnight, one of my Crucial dimms died while the other one was fine. Whenever I tried to play COD 4 it blue screened me every few minutes crashing.

When you have strange things happening, often the best way to troubleshoot is by elimination. Even if it's doubtful, you be sure by simply removing one stick of RAM and starting a game. Do this once for each Mem stick, same results means your RAM is probably fine.

What kind of error are you getting? Does it produce a memory dump? Do you have your system set to dump memory on BSOD? Errors in syslogs? Devices in device manager that have any problems/conficts?

Use windebug to analyze the dump, it might give you a clue as to which piece of hardware is generating the exception.

If you're getting a BSOD I would suggest referencing this place:

http://aumha.org/a/stop.htm

I too, doubt it's RAM.

What concerns me is you didn't format and reinstall, you did a dirty install. I specifically avoid that because I've run into problems left and right with it. Also check to see if there is an event log created. You might be able to get a better clue as to what is going on.

Right Click 'My Computer' => Manage => Event Viewer => System if I remember correctly. Look for the X's and the !'s. Sometimes they will carry some more details with them. You never know, you might get lucky. All in all I'd definately say software glitch somewhere, hardware sounds to be okay.

Wow I didn't notice this when I first posted but installing over an existing install is not very smart, never heard of somebody doing this before. Simply back-up all your info/data to a DVD or flash drive then after you format and install Windows XP you can still install your older files and pictures. Installing over another install is like throwing new carpet over dirty carpet, the stains are still there and will present more problems later.

You mean for now things are ok, but later on I wouldn't be suprised if more problems came up. Why you would want to do a dirty install is suprising to say the least.

True, but whats done can be redone and done the right way. If I had known he had done a dirty install I wouldn't have even bothered to help him. People create their own problems by cutting corners, then come here for help and wonder why this is happenning to them. STUPID

I guess the OP finally got around to it. I'm guessing the dirty install corrupted Direct X as well.

To the OP, you may want to, when you have the time, do a format and install as others have suggested.

Anyway, you're up and going for now.