Well, I have an strange problem using the Viper V770 ultra 8tnt2 ultra) card:
When I am running a game (d3d or opengl), after a couple of minute, or sometimes an hour, the computer freeze, it just crash. I try to switch from drivers to drivers (5.13 to 6.18) without luck, and the fan that comes with the video card work fine, so I don`t know.. maybe is still overheating??, I really don`t know.
Please, if someone know something about this, reply to me. Thanks

My spec are:
sy - 6vba 133 (motherboard)
SB live! (lifeware 3.0)