Hey gang. I have a Sapphire Vapor-x 5770 and lately I've been worrying about the temperatures it reaches. Earlier today I was playing Borderlands when the card was hovering at a constant 70 degrees celcius with the fan at 50%. Is this a safe temperatute for it to be running at? Also how much cooler do the Vapor-x models run compared to the standard 5770's? Any input here would be appreciated.