Is there the PEG power coming into the air intake vent? If yes then you seem to block it with this cables, what happened to side PEG socket?
Idk... that's just where the power plugs were on that 5850. It's an xfx, and i have an xfx 6870 in my main system where the power plugs are on the side, rest of the card is identical to the 5850