2x amd 6850?

Yes 6850cf is more power than a GTX 580 and your CPU is not a bottle neck.

You will be receiving mostly over 60fps at all times with an odd dip here and there with 2x 6850 same performance for GTX 580 but at leased with the 6850 you saved yourself $350 for the same power as GTX 580.

First, if you want BF3, check out the forums the see if people managed to overcome the crossfire issues. A lot of people had problems with crossfire and BF3 using 6XXX radeon cards.

Secondly, it is a good config. I have a pair of 6870's myself, and it gets quite fast. On the other hand, I would recommend avoiding dual-vga setups unless you fall in one of these categories:

-Buy one card now, second card later (no money right now).
-Buying flagship cards for top performance (not the case).

The reason I don't recommend crossfire or SLI is beacause it always leads to issues. Almost every game that is released needs a patch or driver update to get things running well. It always takes some time, and for some games, it never happens. So, if you go 2x6850, keep in mind that on some occasions, you will have 1x6850 performance.

Funny how people make a big deal of dual card setups I never had anymore problems with duals cards than I would have had with single cards.

I've found that it's the complete opposite actually, most AAA titles support SLi from the get go (dunno about CF so much) the only recent title that I know of that doesn't is Alan Wake but then that is an AMD game so it's not a big surprise that SLi is nobbled.

+1 ^ and I wish people that have never run dual card setups would just do it and lose these delusions that people that have never run CF or SLI have put into there heads.

lol i just wanted to know cos i only have 650w psu and yea i will be getting another then.