8600gt freezing for no reason

Hey guys, I've finally purchased a new 500W PSU for my rig to run 8600gt on. It has 16amps on the +12v rail and for some reason wheneer I run games like Frontline fuel of war or UT3, it freezes every 3-5 mins, and after 10 seconds or so, it goes back to normal. I was wondering if it's my CPU that's being the bottleneck here or my video card isn't getting enough power supply.

Here's my specs again:

AMD Athlon 64x2 4000+ 2.1Ghz

XFX 8600GT 540/1350/700 256MB GDDR3

3GB RAM

1.5TB HDD

http://www.newegg.com/Product/Product.aspx?Item=N82E16817171018

This is the exact one I bought. That's what the technician recommended anyway.

P.S: there's 2 +12V rails.

I'm using 169.25, that's the best I can find for the 8600GT. ANy recommendations for other drivers? I hate this freezing or w/e it's supposed to be called. Something strange is that Crysis never have this problem, Crysis has alot more requirements than UT3 or FFOWjrtan

you should find it on guru3d forum? or somethign like that.

Usually idle. Here's a screenshot of my CPU under speedfan although I'm not sure if it's accurate or not:

=]

temps? got latest drivers?imprezawrx500

KZ2 > Crysis.

do you have it amped up in the Nvidia control panel... the nvidia 8800series has problems with 16x AA for some reason... just use the performance---------quality slider.TrooperManaic

First off, I"m using a 8600GT. All AA and AFs are turned off from both the Nvidia CP and games. Those don't prove useful to me as I have a 30 inch LCD.