I just bout a evga geforce 9400gt 512mb pci...

I just bout a evga geforce 9400gt 512mb pci
I install the card into the pci slot.Turn on the computer and everthing works ok untill i install the drivers

First of all when i install the drivers in regular windows xp it goes into a black screen with a cursor and gets stuck there

I restart computer and it loads windows up but then finds the 9400gt and install drivers and theres the screen with a cursor again.If i leave the screen with the cursor up for a while eventually the computer starts beeping.

So i uninstalled the drivers in safe mode and reinstall the drivers in safe mode

After i do this i restart the computer into regular windows and now i cant get past the Windows xp loading screen

While loading windows xp it gets stuck and the auto reboots my machine and then i'm just in a cycle untill i go into safe mode or remove the card

At first i thought it was the card so amazon sent me another of the same card.Does the exact same thing with the second card

So now i have 2 evga nvidia geforce 9400gt and now there just useless while i'm using my ati radeon 9250.also yes i uninstalled the ati drivers and intergrated intel drivers before installing the 9400gt

I have a intel celeron 2.66
1.2gb of ram
latest windows xp updates
400w power supply with 12v rail at 26 amp
and pretty upset

can someone please help me