low power-low temp GPU

Hronis

Honorable
Apr 28, 2013
21
0
10,510
I'm between these cards...
7790 2gb
gtx 650 ti boost 2 gb
gtx 660 2gb
i know that 660 is better in performance but my second concerne for me except performance is heat/power consumption...
So which one of these do you propose???