no the issues look like the 8x slot does not work properly, using only one gpu (580) it works in all slots except the last one (no screen on when gpu in x8-2) does not show up in device manager or nvidia cp (when in sli)

we tried using a 1x sound card to test the slot and that surprisingly worked, very strange...

thinking about leaving it running x16 - x16 with stock coolers until the board gets replaced because of the 6 series fiasco