AMD Sapphire Radeon HD 7850
The Radeon HD 7850 is a midrange graphics card that is affordable and efficient. This graphics card combines strong performance with low power consumption. Its ZeroCore Power feature provides a 16 percent reduction in energy consumption when idle. With an updated version of AMD's Eyefinity technology, as many as six screens can be connected with mini-DisplayPort 1.2 sockets. It is available for $179.