The GIGABYTE GV-R724OC-2GI Radeon R7 240 Graphics Card is based on the cutting-edge 28nm GCN architecture, and ships with 2GB GDDR3 video memory on a 128-bit interface. Games enabled with the optimized Mantle speak the language of GCN architecture to unlock revolutionary performance and image quality. The GIGABYTE GV-R724OC-2GI is also factory overclocked with 900 MHz core clock (20 MHz higher than the reference) to take graphics performance higher. Packed with incredible features, such as PCI Express 3.0 x 8 interface, 4K Resolution Support, AMD PowerTune technology, AMD ZeroCore Power technology, AMD Eyefinity technology, and AMD App Acceleration, this card offers you more than one way to elevate your gaming experience. This graphics card needs a 400W system power supply.