ATI 4870 Crossfire help

Also I need to keep the total of the card and board bellow £150

The main reason I wanted to do this was to get more power out my GPU without spending the money to get the 5850 or 5870, the power isn't quite the same. And I do own a copy of all the crysis games, and one of the main reasons I've not been playing them because of the way it ran on one 4870.

I just bought this cpu and have overclocked it to 3.14Ghz, but can get it higher, 6mb 2l cache, so that isn't holding me back, and noice doesn't matter overly for me, I have a good set of speakers and do almost all my games with my headset on so noice doesn't make much of a difference.

I've looked a lot for a card that is identical but can not find one, does the board that I've linked look like it will be able to handle Crossfire and high end gaming?

I have the Asus P5Q PRO myself, it shouldn't have any problems running CrossFire. The 5850 is the best option for price/performance currently. The 5870 is overpriced for what you get IMO.

By the way, I am able to run Crysis with my system and the same card.

both cards have to be identical for the cross fire to work properly, same card to the specs, manufacture, model, ram. so ati yes hmm lets see, is it a diamond, saphire, eah, and so on. both must be the same manufacture, diamond or sapphire. the ram too. you will have problems if the cards are a diamond and a sapphire. must be identical to both specs. which stop me from doing a crossfire since the release of the 4890, the 4870 where I am at has just evaporated off the shelf and the stores are no longer ordering the ati 4870 1 gig diamond. so I am stuck now since my next upgrade will be another pc from scratch when the time comes because one 4870 is just plenty for me. later. some people say that the same specs to not matter and they do not know what they are talking about. later

Okay, thanks guys. I think I'll stick with my 4870, I've overclocked it a bit, might be able to push it a little bit more. Then in the post xmas sale I'll get a 5870 or 5890 if they're out yet.

That is true, my friend is doing that at the moment with a 4870 and a 4890. But I still think that I should wait for the 5870. Just because after xmas the price will drop.