ATI X1600. Display Freezes.

Hi,

I've checked the forums at ATI before coming here. I downloaded the new
driver that came out this month for my card.


Every time I play a game on Steam (Day of Defeat, TF2, Etc.) I play in
between 15-45 minutes and then the game freezes up and overloads my processor
with repetitive sound and a Super low frame rate. I have "net_graph 3"
showing 2.5 fps and 4000+ ms (which is my monitor refresh rate.. i think).

SO I usually wait because I figure my comp. with stop having a seizure and
act normal. After Ctrl Alt Del....And some choppy mouse movements to end the
process of Half-life Launcher etc. It still hangs and I have to hit the
restart button.

I know this isn't good for my hard drive so I've come here to fix this
problem before I wreck anything.

I got a program called GPU-Z and it gave me this information:






Maybe 60 degrees celcius is too hot and is causing the problem.

I have an Antec 900 Case with plenty of airflow.
AMD 2.4 GHz
Windows Vista 32 bit.
Direct X 9.0c
2 GB RAM
SB X-Fi Platinum Edition 64 Mb on board Memory

-- I Scanned for viruses With Bit defender 2008. Found nothing.--
-- I just finished Updating Vista with SP 1 (This did not fix the problem) --

The Games that My computer freezes on and I'm forced to restart are as
follows:

Day of Defeat
Day of Defeat : Source
Company of Heroes
Company of Heroes : Opposing Fronts
Team Fortress 2


**IMPORTANT NOTE**

I HAD THIS PROBLEM PRIOR TO MY FRESH INSTALL AND I JUST THOUGHT IT WAS A
VIRUS AND I DIDN'T WANT TO DEAL WITH IT SO I JUST REINSTALLED.
I'M GUESSING IT HAS TO DO WITH CONFLICT BETWEEN VISTA AND MY CARD OR MY CARD
AND THE GAME.
THE QUESTION IS HOW DO I NARROW IT DOWN?

Sorry about the CAPS LOCK lol. I just wanted you to read that part. hehe.

I've tried as much as I know and I have all my graphics setting on low
through the ATI control Panel for my x1600 512 MB card.

What else should I try ?