I currently have a Radeon HD 6850 graphics card, and am looking for a bit of a step up in performance. I have an i5 3570k that I've yet to overclock (I keep telling myself I will), and am trying to figure out what would be the next best step to improve my computer. Really, just curious as to how 2 6850s would compare to a 7870 XT or 7950. I don't necessarily have a set budget and could buy any of the three cards, but I'm looking for the more economical choice. Sell my current card and fork out $250-300 for the 7970 XT/7950 or $140 for a second 6850.
Oh wow wasn't expecting such a quick response. Thanks. I actually posted the question on another forum and got a different response (to go for 7870 XT or 7950). Know of anything to compare (specifically) the 6850 crossfire with the 7950? I've found a few that show the 6850 alone in comparison to others, but is it just a straight up 2x as effective if you have 2 of it?
Also, any recommended PSUs? My current one is 480 watts. Would I need any additional cables to run crossfire or just a second connector from the PSU to the card itsself?