Upgrading computer / mining

[kimpinz2]

Hey.
I'm thinking of upgrading my computer so i can also use it for mining.
What would be the best setup?
Budget 1200USD.

Considering 1 card or 2 cards.

Current setup:

Asrock z77 pro4
i3570k
8gb ram
128gb ssd
GTX 660
550W Corsair PSU.

Thanks in advance.

[kimpinz2]

Bump.
I've been looking some. 280x seems to be a very popular card, however very hard to get hands on.

I've done some search and it seems that 7990 is (about) 2x 7970s?

I've found 7970s second hand for about 120-200USD each.
7990 would be around 600usd.

Since I can get 4 7970s for rougly 800USD i might consider doing a separate mining rig instead.


What about 270x / 290?
Any suggestions?