Gigabyte AMD Radeon R7 250X OC 2GB GDDR5 VGA/2DVI/HDMI PCI-Express Video Card GV-R725XOC-2GI GIGABYTE custom-designed 10 cm cooler Ultra Durable 2 Series OC Edition - Core Clock: 1020MHz (Standard: 1000MHz) Memory Clock: 4500MHz System power supply requirement: 450W Form Factor: ATX