The guys down at IBuyPower Australia can't get rid of us these days. We are surprised they haven't started asking me to pay rent. The other day the ASUS P5E64 WS Evolution board arrived, and this thing just absolutely won us over as far as looks and features went. However, the feature that we really care about today is the fact it has four PCI Express expansion slots. So, with four Radeon HD 4850's in hand and hopefully a driver that was going to work, it was time to take four of these single slot bad boys to town. Of course you have to take in mind that to power these you will also need a very strong processor of you just won't be able to feed this monster. - TweakTown

AMD Radeon HD 4850 Quad CrossFire Config Review

It seems that the hot fix driver should simply be called the increase your 3DMark score driver. Apart from the two synthetic benchmarks, the only game to really see an increase in performance was Unreal Tournament 3. Outside of that, most games had a negative effect when adding more video cards. Hopefully this is something that AMD attack over the coming months. With more and more boards offering two or three PCI Express slots, placing a third card into your system at these prices could be more than doable. Two cards really is the sweet spot for the Radeon HD 4850's at the moment.

We see some good gains over a single card and the cost is still relatively low compared to the competition. Now all we have to do is wait for the Radeon HD 4870 so we can see what that can do for us. AMD have a winner on their hands with the Radeon HD 4850, just don't expect to see the same value for money as you start climbing the ranks with three or four cards. It could still be a while before we see these kinds of setups represent any form of value for money, much like NVIDIA with their 3-way SLI GeForce GTX 280 setup.