Hi, i have just received my brothers old pc which held two geforce 8600 gts's and an sli bridge but i cannot seem to get it to work. The computer picks up the first GPU but not the second, then i tried testing the second GPU in the primary PCI E slot and it didnt work, it would not bring an image up on my monitors but when i put it into a different computer it worked fine. Any suggestions on how i could fix this????