I just happened to have upgraded from 470's in SLI to a single 680 this week. The 680 is about 30% faster than 470's in SLI, and it's a LOT quieter. That's the big downside of the 470's and why I couldn't wait to get rid of them. GTX 470's are loud with 1, but ridiculous with 2.
So I guess the question is, do you want to spend more for a quieter faster setup?
Well the thing is i don't want to spend like 500 on a new card i have like $200 to $300 on a new card thats why i was thinking about doing SLI 470's.I just want to to get the best FPS i can get for the money
Ya that card is the same one i linked.
If you have any plans to add a 2nd video card you should get a PSU off these list of AMD certified power supplies. Probably need 650-700watts to run an Xfire setup depending on the rest of your PC. http://sites.amd.com/us/game/products/certified/Pages/c...
Or if you can get off newegg, I recommend this Non overclocked version of the sapphire 7850 you showed me which costs $300, in newegg it cost $250 (Not including shipping and tax).
And I'd stay away from those PSU, go for the decent branded one, it's worth it. For example a Corsair TX750. Maybe it has less wattage for the same price, but the quality is better, will stay longer, better warranty and tech support .