Asrock extreme 4 gpu detection problem

[jshun1234]

hi.. I recently bought Asrock mb and everything else seems fine except that the board does not detect my gpu at all... Ive tested my gpu on another board and works fine so im 100% sure its not my gpu... I went around web and found alot of people having same issue and tried following

reset CMOS
Update BIOS (2.50)
try placing Gpu in 2nd pcie slot
reinstalling window and gpu driver
swapped out PSU to different one
and many more through bios setting....

My specs are
asrock z77 extreme4
i5 3570k cpu
8gb cosair vengence RAM
Sapphire HD 6950 2GB GPU
750w OCZ PSU
OS w7 64bit SP1

i am pulling my hair out here this is the 2nd board and i really dont want send this one again shipping and time wasted are adding up... Please help

[- wardog -]

Might seem silly of me to ask but you haven't forgotten to connect the 8-pin ATX12V1 power connector at the "top' edge of the motherboard have you?

I only ask as you going on two boards with the same problem is suspect.

[jshun1234]

Might seem silly of me to ask but you haven't forgotten to connect the 8-pin ATX12V1 power connector at the "top' edge of the motherboard have you?

I only ask as you going on two boards with the same problem is suspect.

if i dont connect that the computer doesnt even turn on so yes i did connect it

[parsec]

Are you saying you saw the same problem with this board and the same video card that you have? That would make more sense than any video card.

I've used three quite different Nvidia based video cards on my Z77 EX 4 boards, and they all worked fine.

Does the on board video work for you?

I'm not saying that you don't have an issue, but it would help your situation if you narrowed the issue down to one card or one type of cards. That would be more likely to get ASRock's attention.

[jshun1234]

i did test my gpu on different mb but worked fine... and no i dont have another card to test =(

first i thought it was my gpu so i took it to parts store and they tested it for me and without even grapgic driver it worked fine on their mb

[- wardog -]

if i dont connect that the computer doesnt even turn on so yes i did connect it

Let me rephrase my original question.

Have you plugged in all 8 pins/wires into the ATX12V1 connector?

[jshun1234]

Yes

[necra]

in the bios what is the first video? onboard ,or pcie, or cpu ?

[Capt Proton]

if i dont connect that the computer doesnt even turn on so yes i did connect it

Well, this is not consistent. I actually did forget to plug in the PCIe power lead on a GTX 660 card. The computer powered on, however, no picture. This could be indicative of the issue, but, what it may indicate I do not know.

[jshun1234]

It is set to pcie and everything below it is set to auto