HD 3870 512 MB, PCI Express 2.0 x16, 256-bit GDDR4
Sapphire 21122-00-20R, GDDR4, 256 bit, 2250 MHz, 2560 x 1600 pixels
Sapphire 21122-00-20R. Processor frequency: 775 MHz. Graphics card memory type: GDDR4, Memory bus: 256 bit, Memory clock speed: 2250 MHz. Maximum resolution: 2560 x 1600 pixels. DirectX version: 10.1, OpenGL version: 2.0, Dual Link DVI