I have managed to get everything figured out and working but one problem.
I have a rig that has
4 7870 Tahitis
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131484MoBO
http://www.newegg.com/Product/Product.aspx?Item=N82E168131285211300W PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E168171820638 gigs of ram
CCC 12.8
All risers are powered. and every video card has a dummy plug (I have swapped the dummy plugs just in case one was bad)
runs on windows 7 pro 64bit using CGminer (newest version).
All 4 cards are running smooth. I am able to get them to mine sha256 526 MH/s.
But when I try to mine scrypt card 1 and 4 only will get around 250 KH/s and 2-3 get around 420KH/s
Card 1 is pcie-1x and card 4 is pcie- 4x. Card 2 is PCIE-16x and card 3 is PCIE-1x
I have checked the mem/core clocks with gpuz to verify that the cards arent being throttled. I have tried all versions of ccc from 12.1 and newer. They are all running the same settings in one instance of cgminer. I have searched for hours for this issue. I have given up searching and hopes that some one has the answer here. Any ideas?