Firing Squad writes: "So far AMD's bold new strategy of skipping large, cutting edge high-end GPUs in favor of smaller, more efficient midrange GPU designs, and then scaling that technology up and down the rest of their graphics lineup has paid off.
Their RV770-based Radeon HD 4850 and 4870 both deliver excellent performance in their respective price segments. Their arrival forced NVIDIA to slash prices on their entire GeForce lineup, including their flagship GeForce GTX 260 and GTX 280 GPUs. Despite the GeForce price cuts, this hasn't stopped ATI from taking share from NVIDIA. And in the high-end of the market, ATI's dual GPU Radeon HD 4870 X2 is the fastest graphics card in the world right now.
But how well does this strategy scale down? Does ATI's architecture continue to perform well with half of its functional units (including its shaders), removed? That's what we're here today to find out!"