ASUS H4850/HTDI/512MD3/A, GDDR3, 256 bit, 1986 MHz, 2560 x 1600 pixels, PCI Express 2.0 ASUS H4850/HTDI/512MD3/A. Processor frequency: 625 MHz. Graphics card memory type: GDDR3, Memory bus: 256 bit, Memory clock speed: 1986 MHz. Maximum resolution: 2560 x 1600 pixels. DirectX version: 10.1, OpenGL version: 2.1. Interface type: PCI Express 2.0. Cooling type: Active