Diamond Multimedia AMD R9 290X PCIE GDDR5 4GB Memory Graphics Video Card R9290XD54GV2 PCI Express based PC is required with one X16 lane graphics slot available on the motherboard 750W (or greater) power supply with one 150W 8-pin and one 150W 6-pin PCI Express power connectors recommended 1000W (or greater) power supply with two 150W 8-pin and two 150W 6-pin PCI Express power connectors recommended for AMD CrossFire technology in dual mode The operation of AMD CrossFire technology in dual mode requires a second AMD Radeon R9 290X graphics card and an AMD CrossFire Ready motherboard Minimum 4GB of system memory 8GB (or more) system memory recommended for AMD CrossFire technology Installation software requires CD-ROM drive