CrossFiring Dual Cards?

[Minimoke]

Hi all,
I'll be updating my system soon, as it's a dinosaur in a lot of respects. Was kick arse when I got it, but that's the way things go with computers isn't it. The question I've got though....

I'll be updating to a new board, and chances are it'll have dual PCI-e on it, as I like my boards to be high spec. A friend of mine has offered me his 6770 for £40. I've already got a 4850 X2 2GB, (told you it was old) would I be better off with a 6770 1GB over my current card? DX11 is an instant advantage I guess. I'm guessing buying another 4850 X2 and running two of 'em wouldn't really be worth it, would it? I've also considered buying my mates 6770 and then getting another one for Crossfiring. Both cards would only cost just over £110. Is that my best bet?

Sorry for the long winded post, I just like to make sure I'm doing the right thing with my hard earned pennies. Thanks in advance,

Chris.

 

[arc@css]

Your 4850X2 will be faster than a 6770, I'm thinking around 15 - 20% faster at the very most.

Although the 6770 can do dx11 it lacks sufficient power to do it justice. If I was in your shoes I would seek a much faster single gpu that would out perform the X2, draw less juice and runs quieter.

Crossfiring dual gpu cards would increase power draw even more, create more noise and besides, the driver support can be very hit and miss.

As you mentioned, you could go for two 6770's in crossfire which would be a little faster and more power efficient than a 4870X2, though as I've already said, I would generally recommend a single gpu card as my preferred choice.

 

[arc@css]

Woops, double post.