Card brands? HD 7870/GTX 660

[AyeH13]

Hi, getting a new build for gaming

Was thinking of getting a GTX 660 (NOT Ti) or a HD 7870

There is loads of card with 7870 I'm wondering if they are all similar performance wise? (as some are cheaper than others)

Also, 660 vs 7870?

Thanks

 

[ASHISH65]

hd 7870 is just little faster than gtx 660.

- http://tpucdn.com/reviews/EVGA/GTX_650_Ti_Boost_SC/images/perfrel_1920.gif

hd 7870 - saphhire hd 7870 ghz edition

gtx 660 - evga gtx 660