I currently have an HP a1750e with a 7300le gpu.... My buddy gave me his x1950xt to install. I uninstalled the 7300le drivers in Vista, though I'm not 100 percent sure that went correctly, and then I installed the x1950... when I booted up, you guessed it, NO PICTURE. (and yes, I remembered to hook up the power to the x1950)
So.... I put my 7300le back in, and Vista installed the drivers and it's fine....
Also, Drivers wouldn't stop you from being able to see the display when it posts. So it must be a hardware problem. You should try pluging the card into a different power rail if you are running it off of 2 4pin molex connectors.
i dont think thats enough power to be honest i see other 19XX series cards sucking up as much as 270 watts of power on load and idle is like 150 i think u need a new good PSU of 500 watts
also what else are you running thats sucking up power
casue most PSUs are only like 70-80% efficient i could be wrong but i really think u need a better PSU
I have the exact card in a machine with an old thermaltake power supply 480W and it works fine. The PS is about 3 years old. Ok here is what I found about power requirements. So maybe your PS is not enough.
* 450 WATT PSU w/ a 12V rail of at least 30 Amps on the 12-V rail.
* PCI-E compatible Motherboard
* 512 MB of system RAM