High Quality AA and AF
Our high quality tests let us separate the men from the boys and the ladies from the girls. If the cards weren't struggling before they will start to now.
Cranking up the AA and AF under 3DMark06; we can see that the Crossfire configuration is able to beat out everything. The single card solution sits only a little behind the heavily overclocked GTX 260 from XFX.
World In Conflict
What we see here under these extreme circumstances is the HD 4870 setup really shining against the single card. Compared to the GTX 280, there is only a few FPS between the two setups. The single card sits behind the GTX 260 while out performing everything else.