Well, long story short, I know the card works since I installed it in another machine. In my main machine, A64 3500+ I uninstalled nvidia drivers, safe mode used driver cleaner, then installed new nvidia drivers. Right when it gets past the windows loading screen the monitor goes to sleep. I thought it was my Austin 450W psu. So I bought a new 530w Fortron, Tried seperate rails, unplugged everything but HD same thing. Im at a complete loss. The card works on my old 2100+ system with an allied 400w psu.