@ffarinas,

Actually, I am losing a lot with some of my cards. I have 560's with 4GB RAM and 550's with 2 GB RAM. The 560's lost only a small percentage of hashrate, but the 550's took a heavy hit, hashing around 280-300 h/s, down from 480-500 h/s. Is there anybody who has some 550's and could give me some advice on how I could set them up to minimize the loss?