Help: My PC shuts down (crashes) while Playing Games

[daseville]

My PC shuts down (crashes) while playing Rainbow Six Vegas 2. It is a fairly new build consisting of:

Thermaltake Armor LCS (I am liquid cooling the CPU)
Asus M2M32 SLI-Deluxe\wireless edition
AMD X2 6000+ running at stock speed
2 X's PNY 8800 GTS in SLI running at stock speeds
2 gigs of Mushkin Memory DDR2 in Dual Channel
Ultra 600 watt Power Supply SLI Ready
2 x DVD\RW
Using On-Board Sound
OS is Vista Ultimate with SP1

I am using Nforce tools Hardware Monitor, and Asus' PC Probe II to monitor temps. My CPU idles at around 44c and around 47c under load. My mother board shows 45c and the hottest it gets 47c. My video cards idle between 53c on core 1 and 60c on core 2 and can go up by 10c under load. I checked around the forums and there are varying suggestions from power-supply to overheating. Anyone out there have any thoughts? Or, any suggestions on how to fix it?

 

[dhc014]

Are the 8800GTS cards 320MB, 512MB, or 640MB?

I would suspect that the power supply is too weak. Try disconnecting the optical drives and any other unnecessary components that are connected to your power supply and see if that helps. You could also try removing one of the 8800GTS's temporarily.