ASUS VGA Extreme AX1600PRO/TD 256 MB PCI-E, GDDR2, 128 bit, 780 MHz, 2048 x 1536 pixels ASUS VGA Extreme AX1600PRO/TD 256 MB PCI-E. Processor frequency: 500 MHz. Graphics card memory type: GDDR2, Memory bus: 128 bit, Memory clock speed: 780 MHz. Maximum resolution: 2048 x 1536 pixels. DirectX version: 9.0