to save some power, i added a 7790 to my 5870 for a mini dual card setup.
it pretty much seemed to take an OS reload to even get just the 7790 working (and THAT didn't even work until i manually installed OpenCL via the MSI file from the CD that came with the card).
after a fair bit of uninstalling and reinstalling, i finally got the cards to even show OpenCL support in GPU-Z (i think it took
the ULPS registry entry to do this). however, even then, all clients were crashing: CGMiner and BFGMiner; GUIMiner won't even start.
FINALLY, after i
put the 7790 in the top PCI-e slot (out of 2 16x-length slots), would *anything* get a result: CGMiner, however, the 5870 only gives "invalid nonce - HW error." the 7790 works just fine. and all the other apps still only crash.
my most recent fix attempt included hooking the monitor to the 5870, it's exactly the same.
i'm at a loss.
any ideas?
currently running
Athlon II X4 630 on GA-970A-D3
Mushkin 2x1GB DDR3-1333
Server 2008 R2 x64
PC Power & Cooling Silencer 750 watt
CCC 13.5 beta (but also most recently tested on either "12.101.2" (whatever came on the disc) or 12.101.2.1-130416a from the website--i can't remember)
a side note just to verify the GPU doesn't seem faulty: Furmark works on the 7790 as well as the 5870.
additional finding while waiting for my ability to post:
i got finally Phoenix2 working alongside CGMiner, but the hashrate is 10m/hashes lower than it should be, but more concerningly, i'm getting ~3-6% rejections (CGminer has 0.3%). it would also be nice to be able to use just 1 app.