16 x 5970 @ 390 MH/s per GPU = 12480 MH/s
At the current difficulty and at a value of $4.8 per BTC would see break even in less than 6 months.
This includes $1200 for the system build and $400 per 5970.
16 X 7990 @ 600 MH/s per GPU = 19200 MH/s
At the current difficulty and at a value of $4.8 per BTC would see break even in 7 months.
This includes $1200 for the system build and $849 per 7990
It would be nice if it can be hashing before the halving.
Except you cant buy 5970s, and 7990s will be dropping in about 6 months.... so buy the 5970s now, sell them, and replace them with 7990s
Did you mean you CAN buy 5970's?
Nope, can't. Almost all the used ones on ebay are owned by insane overclocker gamer types, and have done dumb shit like throw out the stock hsf in favor of improperly installing a wc block that probably cracked the dies.
Total YMMV territory.
Huh. I have purchased at least 8 off of Ebay, and every single one of them is working great. The only issue I had was a bad fan, and that fixed with a $39 fan and about 20 minutes work.
Have you had bad experiences personally, or are you simply speculating?
Aggregating bad experiences of others.