Motherboard problems

My computer is crashing after I installed the motherboard drivers when I play games. Here's how I got to this conclusion. I bought my computer back in December 2004. When I first booted it up, it worked fine. Then I installed Farcry and tried playing that. Everything was running smoothly and then after about 15 minutes my system froze up and rebooted. I tried UT2004 and the same thing happen. Almost any highend game I played would freeze the system after about 15-45 minutes of play time. So thinking it might have been an update I got or new driver, I started rolling back things and reinstalled windows. I tried playing the games again and the problem was fixed, IE the computer wouldn't crash. The only thing I noticed was a major drop in FPS, about 50-75% reduction in speed. I wasn't sure what was to account to this, but my system wasn't crashing so I was happy. When I first got my computer it was on 512 ram. I ran 3dMark05 and scored about 300. Pretty freaking low, but I couldn't figure out the problem, and it didn't bother me since my games were running fine. Then a few weeks ago I recently upgraded to 2 gigs of ram. I decided to try out 3DMark05 again and with 2 gigs I scored 1000. This was way under the average. I then looked around at the 3dmark support forums and saw some people having the same problem, their solution being that their motherboard drivers wern't installed. So I came to your site and downloaded the latest mobo drivers. Low and behold, I was back up to full speed, games running more then double their speed from before, and my 3DMark05 score went up to 2500. Then while playing the new Battlefield 2 demo, about 5 minutes into it, my computer freezes then crashes. It reboots, and at windows logon screen, it restarts without me doing anything. It will restart 1-4(even upwards 8) times at windows logon before fully being able to start up. This only happens when the mobo drivers are installed, and I'm playing a demanding graphics game. I can surf the net for hours, or leave my computer on doing nothing and never have a problem. I updated the latest BIOS hoping that would help, but it didn't. Even then after restarting my computer on purpose(not from a crash) it would take a few restarts before it would fully start up. What can I do? :\


Using:
GA-K8NS Ultra-939
Nividia GeForce 6800 LE
AMD 64 3000+
2 gigs of ram

 

It sounds like it could be a memory problem. Try reseating your memory sticks. Also, if you're doing any overclocking, dial the settings back to normal.

 

Check your PSU volts in PC heath bios, t* of CPU and VGA card, use some softs like memtest for testing ram.

 

Not over clocking at all. As for the memory, that's fine also. I had the orginal 512, and that was ok. Then while my motherboard drivers were not installed, I upgraded to 2 gigs and used that for 2 or 3 weeks without any problems at all. Only started once I installed my motherboard drivers.

@A.Son, what am I looking for when I check the PSU? As far as temperatures, Pretty sure its not overheating either. What would I look for there though?

 

Login motherboard bios, chose PC heath, check volt and CPU t*.
you can touch VGA heatsink and your felling ?
how about your PSU capacity ?
would you tell us know how about drivers you already install in ?