SAPPHIRE 100248L Radeon HD 3850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card 320 Stream Processors 512MB 256-bit GDDR3 PCI Express 2.0 x16 PCI Express based PC is required with one X16 lane graphic slot available on the motherboard 1GB or greater system memory for better performance