Still no luck.
Pulling that 6870 offline seems to allow me to mine with the 7850 and the 2 7870's. I've tried switching the second PSU to power one of the 7870 and put the main PSU on the 6870, 7870 and 7850 and still no luck.
My .bat file currently is:
cgminer.exe --scrypt -o stratum+tcp://gigahash.wemineltc.com:3335 -u USERNAME -p PASSWORD -I 10
i've tried every possible combo of -d #. I've changed the password, created new workers all without luck.
Does the 7870 drivers include drivers for a 6870?
I'm running the 13.4 and the 2.9 SDK. The 13.4 driver was downloaded for the 7870 and installed while ALL cards were online. I've uninstalled reinstalled to verify and still no luck.