AMD doubles the 4870 fun, still under $400

I’ve been saying this a lot this year: it’s a good time to be in the market for a video card! NVIDIA and AMD are firing volley after volley of significant improvements and price reductions. Although NVIDIA’s on-GPU physics processing is compelling, AMD’s new 4870 X2 (essentially two of the impressive 4870 cards stuck together) provides an insane amount of power for the cost.

If one 4870 made NVIDIA drop their prices by hundreds, what will two do?