I am running Windows 7 32bit
Motherboard Gigabyte AM3 AMD 870 DDR3 ATX (SATA 6G/s USB 3.0)
I have 3 XFX 5870
The problem is that I can't get the third card to work. The two that are in pcie x16 slots are working fine. If I plug the third to pcie x1 via extender Windows doesn't recognize it. I've tried dummy plugs and even plugging in monitors, but still no luck.
However, if I take the two card from x16 slots and leave only the one in x1 it boots up fine and I can start mining on it.
What do you guys think could be the problem?