Updating video card in Gateway FX4710

[spreadhead]

hi, this is my first post. please excuse me for any lack of knowledge and knowing of site procedures. with that said, thank you in advance.

so I have a Gateway FX4710-UB003A pc, specs include:

400watt power supply
6g memory
intel core 2 quad q9330 processors
windows vista 64 bit

I was using a geforce 9800 gt, untill it stopped working and was causing my pc to restart. so I took it out , switched video to the onboard mother slot and have had no problems with pc.

I went to bestbuy today and bought a XFX Radeon HD 6670 and installed it into my pc, AND IM GETTING BLACK SCREEN.

I meet all the requirements for the video card with my pc. the fan is spinning, so I guess its getting power. I thought it was weird though bc my geforce 9800 gt had to be powered by my power supply via 1x 6pin plug in. this card does not have a plug in for power. maybe thats my problem I dont know. the fan is spinning. please help must play diablo 3!!!

 

[mailpup]

Try uninstalling the old nVidia graphics driver before installing the Radeon.

 

[SNGX1275]

Connect monitor to the onboard, go into BIOS and switch video from onboard to PCIe (with the new card still attached). Reboot with monitor connected to new card.