with your system, why not go 5770? it overclocks amazing and scales so amazingly in crossfire. doesn't consume much power, and overall, kicks butt. Would also be a more worthy upgrade.
Originally Posted by Contagion
Performance wise your 4850 beats a 5750.
Its up to you.
5750 gets DX11, low power, great CF scaling.
Originally Posted by NoDestiny
It seems that a lot of test shows the 4850 and 5750 trading blows (that I have read up on at least). I figure, the 5750 will probably OC further as well, but all your points were also considered... I may Xfire this, or I may upgrade later... regardless, performance should be about the same with all the newer technology benefits.
My findings in power thus far...
4850 IDLE ~ 226w
5750 IDLE ~ 210w
4850 LOAD ~ 315w
5750 LOAD ~ 267w
(tested on my cyberpower UPS)