Hi all. I'm having a problem with an ati radeon hd5770. With just the card inserted into the motherboard, the fan spins but there is no display. With the 6 pin power connector inserted, the fan does not spin and still no video. I can reinsert my old gpu and it works fine. The motherboard is a gigabyte 880-ud2h, has 16 gigs ddr3 1333 ram. I also bought a new psu with the correct 6+2 pin connector rated at 600 watts. Any help would be appreciated