Problem with motherboard and GPU

Hi,

I have a big problem that can't resolve.

I have this configuration:

Intel Core i5 2500K
Cooler Noctua NH-U9B
Asus P8H67-V
8GB DDR3
Radeon HD6790
Corsair HX1000W
Nox Blaze

The problem is:

The computer does not recognize the GPU.

I install all right and when start the system with the DVI cable pluged into the HD6790 the monitor i can't get any screen... The system don't recognize the graphic card.

If i use the onboard GPU and search into windows hardware the HD6790 does not in the hardware list.

I try this motherboard with other GPU's and it works fine.

I try this GPU with other system and i worked fine.

I don't understand the problem.

Someone can help me?

Regards.

Take a look in your mobo manual then enter the BIOS and set the GPU. See if this helps:

Asus P8H67-V

Section 2.5.2 System Agent Configuration
Initiate Graphic Adapter [PEG/PCI]
Allows you to decide which graphics controller to use as the primary boot device.
Configuration options: [PCI/PEG] [PEG/PCI]

Select PCI/PEG

Regards,
GEWB