PR crashes please help

[nareik]

After about 30 or so mins of playing. My Pr will crash. The screen will go black and the sound will loop. The only way to fix this is a hard reboot. Or, it will auto restart on its own.

If i change my resoultion LOWER i get more time. about 15mins. Does anyone have any idea what is going on

Ingame= all medium resolution 1024x768

System specs:

AMD Anthlon 64 X2 dual core 5600+ 2.8ghz

2gb ram

vista 32bit

ATI Radeon HD 2600 Pro