I know the card is getting enough power. I can hear the fan running, see the fan running, and can feel the warmth of the card. I know the minimum specs are 450w but my psu is 550w and I am running a very low power system. In fact, before I got this card, I was able to run my whole system (including the 8600gt) on a 300w power supply.
Here are some pics of my bios, I can't find an option to disable onboard video anywhere:
taken on my phone, sorry about the quality, but apparently Print Screen doesn't work in the bios
main screen of bios:
under 'advanced' tab
'advanced features' under 'advanced' tab
'integrated peripherals' under 'advanced' tab
'PnP/Pci configuration' under 'advanced' tab
I really don't see an option anywhere to disable video, maybe someone does?