Got it working!! Had to uninstall the drivers and reinstall. Each card is doing between 24-25 Mh. All I need in one more PCI extender cable and all 4 cards will be installed!!
Got my 480 this morning.
after 2 hours attempting to install Crimson 16.6.2 ... I can't get it to work on W8.1
what Crimson version did you use?
16.6.2 I just installed the drivers, If it tried to install everything it would hang at 59%.
I did notice my system had an "unexpected error" error in the middle of the night and rebooted. I'm wondering if I need to get powered risers.