In our recent review of ATI's Radeon X1950 XTX card, we guessed that the greatly increased memory bandwidth provided by GDDR4 memory would perhaps make the most difference in extreme high resolution, dual-card setups, but we lacked the time to do that testing. Today, we delve into the issue. We're going to pit ATI's best dual-card configuration, the X1950 Crossfire, up against Nvidia's QuadSLI using two GeForce 7950 GX2 cards. We'll test at 1600x1200 and, using Dell's impressive UltraSharp 3007WFP, the whopping resolution of 2560x1600. Which high-end, dual card graphics configuration reigns supreme?