7950gt vs 7900gto

[man_from_uncle]

Hello all,

I'm looking to do an upgrade shortly as one of my 7900gts is starting to play up and it's only a matter of time before I go down to one card. As such i'll be relegating my one working 7900gt to an older PC and getting myself a couple of new cards. Obviously i'll be looking at an increase in performance over my old pair and especially at 1600x1200 which is what I game at.

To me there are only really 2 options, the 7950gt 512mb or the 7900gto. They both have their plus and minus sides in terms of overclocking and potential reliability and I really can't make my mind up. Now I know already what the 7900gtos are capable of individually, but i've not read much about what they are like in SLi and what I have read suggests that the memory won't overclock much. The 7950gts on the other hand i know almost nothing about other than that they come with fairly lame coolers that would have to be replaced.

Can anyone tell me anything about either set-up? Particularly overclockability with SLi.

Thanks,

Uncle