Crossfire 6950 vs Crossfire 7850

[FireFtw]

So I currently have a 6950 sitting in my computer. My friend had a brand new 7850 that he sold to me for $90, but I don't really know what to do now. Would it be better for me to sell my 6950 and buy a second 7850 or to sell the 7850 for another 6950. Assuming I overclocked them both and crossfire them, how much better would the 7850s be than the 6950s?

 

[eric95204]

neither crossfire sucks, just stick with single 7850

 

[bystander]

The 7850 and 6950 are very similar in performance.

(the 6970 may in some cases be more appropriate comparison due to it having 2gb vs 1gb on the 6950 they tested, unless you have a 1gb 6950).
http://www.tomshardware.com/reviews/radeon-hd-7870-review-benchmark,3148-21.html