The cost of high performance video cards has dropped drastically in the last year. Gone are the days of the GeForce 8800 Ultra reigning supreme and gone are the $600-$1000 cards needed to game at high resolutions. The HD 4870 is AMD's fastest single-GPU card available on the market and packs quite a punch for a graphics card that can be found for under $250 after rebate. Read on to see how the Diamond Radeon HD 4870 does against a number of other cards in the same price range.