I inserted the Graphics Card in my PC. Attached monitor to internal Graphics and the bios told me to unplug and attach to eksternal GC. So BIOS recognizes that there is a Card.
Reboot with external GC but no output neither on DVI or hdmi.
PSU 750 W
PCI Express 2.0
8 Gb ram
Core 2 quad core 2,6 GHz