Sparkle Computer Corp. CalibreGTX 580 OC 1536M GDDR5 Arctic Cooling with Triple Fan Dual DVI, PCI-Express 2.0 Native MiniHDMI Video Card Cooling, X580 Arctic Cooling design inside Large capacity 1536MB Microsoft DirectX 11 support Native MiniHDMI & HDMI 1.4a support GDDR5 product 40nm Processor Technology 6% performance increase from DX11