Hi tytanick
I have been following your work. I have mining hardware that I moth-balled a year or two back, and I am just now bringing it back on-lime. I am disabled and have a fixed income, so I had purchased used cards at that time. I didn't mine for very long, as it soon became unprofitable.

What I have is a mineral oil cooled system with 3 (could be 4) Radeon HD 6990 cards (essentially, they are two HD 6950 or 6970 GPUs on one card, each).

The last time I mined with them, I used a Linux based free miner with catalyst 14.6 (PIMP 1.5.4-amd-14.6-r2). I went to the AMD driver site, and they say that the newest catalyst version that will run with HD 6990 cards is 15.9 (not 15.12).

Question: will one of your miners work with my cards if I run 3 or 4 of them (I might have one that is bad).? I would love it, if a Claymores miner would work...I would like to mine Zcash, and maybe some other new-profitable coins like ETH, etc. Thank you.

Here is my Oil-cooled rig: http://i.imgsafe.org/075442f0c9.jpg