The Radeon HD 4890 is essentially an overclocked Radeon HD 4870. However, the tweaks that AMD made to the newer RV790 die result in higher overclocking headroom. At stock speeds, this card is worth the $200. But to get the most out of it, some overclocking is in order. And now that the prices on Radeon HD 5850 cards are through the roof, there's not much between this board and ATI's next-fastest solution.