AMD Radeon HD 5870 EyeFinity 6

AMD’s graphics engine runs six screens, enveloping you in games and movies even as it saves you money, energy and processing power. Most graphics cards can run only two monitors at once, but AMD’s single card sets a new standard by doing the job of three.
Its driver software works around Windows’s four-monitor limit by telling the operating system to see all six screens as one big image. It delivers the final picture over the card’s fast, high-bandwidth monitor connection.