Re: 7990's or 7970's?

@ OP
"Who's going to be the first to try out a 7990?"
http://www.reddit.com/r/litecoinmining/comments/1d0vwz/whos_going_to_be_the_first_to_try_out_a_7990/c9lyf99

Quote from: chinesechicken on May 16, 2013, 05:59:56 AM

1x 7990 : $1000 - 1200Mhah with OC and Tuning
2x 7970 : $800 - 1400mhash with OC and Tuning

you think you about it...

the calculated ROI on a 7990 is about 6-9 months depending on difficulty at the time.

You need to consider more than just the cost of the cards.