BFG 8800 GTX works, but not detected in slot 3 of Rampage Black

Hi all,

Its an awkward situation and I was wondering if anyone can give me some advise:

I bought Rampage 3 Black edition - its works great, but my video card which is BFG 8800 GTX acts up when it is in slot 3.

It works and gets detected correctly in slot 1, 2 and 4, but when in slot 3 - its like it is not there. I get into Windows - the screen is low res, but it does not detect a display adapter.

On this motherboard slots 1 and 3 are x16, slots 2 and 4 are x8.

My PSU is 850W and I both the 8pin and the molex are plugged in to the motherboard.

If I put a low powered (no power connectors) nvidia card in the slot 3 - windows detects it fine.

So I assume the slot 3 is okay, however could it still be bad in relation with power to the slot? I have options to return the board, but don't want to waste time unless the issue above is a reason for concern.

Any feedback will be greatly appreciated.