Antec 902 case, fully working (fans etc)
ASUS M4A78T-E motherboard
Phenom II X4 955 Black Edition With Noctua U12P Cpu cooler.
XFX HD 4890
GeiL DDR3 4GB @ 1333 mhz with 7-7-7-24 timings
PSU: Antec TRUEPOWER 650 Watt ( 2 6 pin's are connected to the graphics card.)
I tried to uninstall any drivers, and reinstall them. Is my gpu broken or something? Or do I need to change something in the BIOS?..
If you set the BIOS to PCI and not onboard, can the 4890 get you to the BIOS screen or it simply does not display anything at all? Are you sure your monitor cable is connected to the 4890 and not the onboard port ?
If it does not display anything at all, then maybe you could contact the card's manufacturer and return it for a replacement.