I have a nVidia Zotac GT430 - This one
It is plugged into a HP DL360 G4 - Specs
It has not worked worth a crap since I bought it. Everytime I attempt to run anything with modern graphics the machine reboots. This is true across OS's. I installed it with the machine running windows, hoping to be able to play Skyrim but it couldn't even handle the old skool Wolfenstein. I have since installed Ubuntu, I have the current driver (295.33), and the problem persists. From what I've read, this card SHOULD rock pretty hard.
Any idea what the problem is?