To the rest of the world, ZOTAC's fastest GeForce GTX 660 Ti offering is the AMP! Edition, but select markets in the Greater China region have access to the good stuff, the GTX 660 Ti Extreme. Built for competitive overclocking, the GTX 660 Ti Extreme from ZOTAC features in the same GamerForce series as the GTX 670 Extreme and GTX 680 Extreme. Except the change in color scheme of the cooler shroud (which is now black+gold), and the narrower memory bus interface, the card is virtually identical to the GTX 670 Extreme.

The GTX 660 Ti Extreme features the same exact PCB design as the one used on the GTX 670 and GTX 680 Extreme graphics cards. With the exception of two empty 32-bit wide memory pads, the PCB designs are identical. The PCB retains the 13-phase VRM that draws power from 6-pin and 8-pin power connectors, OC+ module support, and the beastly dual 92 mm fan-heatsink. The cooler uses five 8 mm-thick nickel-plated copper heat-pipes to convey heat to a dense aluminum fin array, which is then ventilated by the two fans.The reviewers at Expreview put the card through their battery of tests, in which they found it to be roughly as fast as a GeForce GTX 670 (on average, about 12% faster than reference GTX 660 Ti). A section of their review covered its overclocking capabilities. With over-voltage, and using the air-cooling included with the card, the reviewers managed a GPU core offset of a staggering 1401 MHz, with memory frequency of 1902 MHz (7.608 GHz GDDR5-effective), resulting in a memory bandwidth of 182.6 GB/s. The card then went on to munch 3DMark 11 performance preset, yielding a score of P9232 (comparable to that of a GTX 680). Find the complete review at the source link below.