Hi, I'm trying to install a new graphics card in my computer, I've got a Asus P5K SE Motherboard and after much research and advice I've got a Geforce GTX 460 AMP (used to use a Geforce 8500 GT), but when I installed it and switched on I got several beeps from the computer and nothing on my monitor. I'm running XP pro with 4GB ram on a 550watt power supply and I cannot see anything obviously wrong with my installing (no loose wires). Any help would be good, thanks.