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
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
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.