Here are the results from single Radeon X850XT videocard and dual X850 cards in Crossfire configuration on a system with Athlon 64 3200+ (Venice E3) CPU and 2x 512MB Kingston DDR400 memory on a Crossfire-ready motherboard. All the components were running at stock settings (nothing overclocked). The driver is Catalyst 5.10 on Windows XP Pro SP2.