i used the wires that came with my psu, got 2 of 3 gpu's to at least recognize. seems one of my 270x won't be recognized. yellow molex pin pulled out of the harness like flowdoge said. now to figure out the third...
i can get all three to recognize, but i have to leave one card in the mobo, in the earliest slot. i say earliest because it has to be first in line of pcie positions 1-3 of the 5 slots i have. Also, cgminer is un-usable, i get BSOD. again, works fine if everything direct to mobo.
Drivers: i have uninstalled, reinstalled in every possible combination: one card at a time, one card direct on board and one on riser, 2 on board and 1 on riser....etc, etc.
I have read i may need to jumper the pcie1x slot, but thats if i used the 1x. Don't know if I would have to jumper the 16x slots im using. Also read my board doesn't take well to powered risers.
In AMD Catalyst, I see the 3 gpus. Only the one on the mobo is enabled. Also, now I can't run cgminer with boards attached to mobo directly.
well, it doesnt matter now. 2 month old motherboard is officially dead. Will be buying a gigabyte board and post results when it arrives.
First make sure they work without the risers. Put the cards in right on the motherboard. If they're still not showing up, your cards and/or motherboard and/or OS setup are hosed. If at any point you have reversed the risers, you have likely fried things. If they work, then move on:
i posted in first post i wrote they all work attached to mobo directly. issue was heat.
