Gigabyte AMD Radeon R7 240 GDDR3-2GB DVI-D/HDMI/D-SUB OC Video Graphics Cards GV-R724OC-2GI REV2.0 OC Edition - Core Clock: 900 MHz(Std 780 MHz) Powered by AMD Radeon R7 240 GPU. Dimension: 13 inch L x 9.3 inch W x 2.3 inch H Integrated with the first 2048MB DDR3 memory and 128-bit memory interface The vendor SKU for this item is GV-R724OC-2GI Form Factor: ATX GIGABYTE custom-designed 10 cm cooler Ultra Durable 2 Series OC Edition - Core Clock: 900 MHz(Std 780 MHz) System power supply requirement: 400W