Wow, such profit!
I have been using my GPU's to mine ethereum.
How have you fared so far? And with what GPUs? Just curious as I've been looking into doing the same
Ethereum and Ethereum clone are best mined with the following: HD 7970, R9 280x, HD 7990 or 295x2. These cards probably have the best hash power per watt and better scalability.
My mining rig has 3x HD 7970's that do 68~71 MHS and do about a block a day with Ethereum or 6 to 8 blocks with SHIFTcoin.