ZOTAC International, a global innovator and manufacturer of graphics cards, mainboards and mini-PCs, today pushes the ZOTAC GeForce GTX 660 Ti to extremes with the new limited edition ZOTAC GeForce GTX 660 Ti AMP! Extreme Edition. The ZOTAC GeForce GTX 660 Ti AMP! Extreme Edition goes beyond the AMP! Edition and raises the engine clocks an extra six-percent higher for a greater performance boost in the latest games and applications.