New
#11
Maybe I wasn't clear. The I7-3930k provides PCI-E 3 on a P9X79 Pro, even though Intel doesn't officially support it. There's nothing that you need to do to turn it on, other than leave the BIOS settings at their default Gen3 values. I guess that Intel built-in the capability, but decided not to certify it.
(I need to use an nVidia utility to turn on PCI-E 3 in their drivers for a GTX 680. Nothing like that is needed with a AMD Radeon 7970; I presume that a 7850 would be the same.)
You make your own custom cables? Neat. Most of the "cable management" enthusiasts I've seen don't go in for that.