Oh, I have 3 6990 cards.
then you should be mildly profitable, but not an a very fast speed. Any futher steps you can take for reducing your electricity cost or the power use from the mobo/HDD/CPU/etc would make the profit marin betterundervolt the cards? Is there a recommended amount to do it by?
I was running my 4x 5830s at 0.99vcore w/ roughly stock core frequency and mem clock @ 300 (i noticed hash rate started slipping if i went under 300).
At 0.10$/kwh i was making like 60$/mo of which roughly 30$ would get spent on electricity. I decided it was not worth it and shut them down. Still working on my Stratix IV FPGA dev board trying to get it mining (without much success).
