7800GS problem

[The One]

Hi all,

I picked up a 7800GS from the B-grade section last night, installed it today (having removed the drivers) and tried to boot up the PC. Everything is fine until I it gets to the Windows loading stage. I see the Windows logo for a second and then the screen goes black followed by a no signal message from the monitor.

I tried disconnecting unneeded optical drives, using only 1 stick of RAM etc - same result. My previous card works fine.

What else should I try before RMAing the card?

System specs are

Abit IS7-E2 mobo
P4 3.2GHz Prescott
2GB Geil dual channel value kit
BFG 6800GS and XFX 7800GS (the new one)
500W PSU

 

[The One]

It didn't boot into Safe mode.

I read somewhere that it's a driver problem so I installed windows onto a different HDD (been meaning to migrate to my newer drive anyway) and so far so good...booted up, installing stuff.