Probl;ems with XFX PCI Express Cards

Hello I am having difficulty booting up my i5/2500K/Intel DP67BG Board.

The system continuously reboots with two known working cards (XFX 8800 and 9800).

It does boot up with an ATI X700 PRo which does not require a seperate pci-express power cable.

I have verified the power supply is not the issue.

I do not have a pci-express ATI card that requires additional power from a pci cable from the power supply


Am I missing something here? Is there a problem with suppot for these NVIDIA cards?


If the board was bad wouldnt it not accept any pci card?


Puzzled. HELP !!


Thank you