adasab, you stated "I have a 6990. Use drivers 15.7

And mine ETH with it with his miner software not ZEC. ZEC will run at 2Sol/s per core so 4Sol/s.

With ETH you will get 13MH/s each so 26MH/s total. Almost the speed of RX480 & 390 just uses alot of power.

You can also undervolt them to like 1.0V to save on heat and power"

Thanks man. Is that with Claymores? Which version? Dual miner (ETH & Zcash)? And, where can I get it? Where to mine?

Appreciate your input...James