Gigabyte GT 640 GDDR5-1GB D-SUB/DVI/HDMI Low Profile Graphics Card GV-N640D5-1GL Gigabyte Ultra Durable 2 Components - Ultra Cooling Low RDS(on) MOSFET Design - Low Power Loss Ferrite Core Chokes - Longer Life All-Solid Capacitor Design Gigabyte Custom-Designed Low-Profile Single-Slot Fan sink for maximum cooling efficiency and whisper silent operation. Core Clock: 1046MHz - Memory Clock: 5000MHz Features DVI-D/HDMI/D-SUB outputs with HDCP protection Minimum Recommended System power supply 350W