3rd GPU will not run in betas

[Diesel]

I used cmd when i was using the .exe , but went to cygwin to build betas. It does happen in -a1,0,3,6,7 it happens on all the hash types i've tried. the 3rd card is on a riser.  If I have to I can pull my motherboard out to test it without the riser.
When running a benchmark its all over the place. It might run any combination of the cards or none at all.