Hey man I got almost exactly the same rig!!!! Bit with the coolermaster 830 CM stacker & just the one 8800GTX!!!! Oh & a tuniq tower120 heatsink. Its great tho isnt it!!!! I was runing mine overclocked to 3.7 gig but it seemed a touch unstable (rebooted on its own in games occasionally) to I have set it back to defaults. Hope thats what the problem was or im gonna get worried!!!