MSI GTX 660 Ti Power Edition OC Video Card Review @Hi Tech Legion
 

The MSI GTX 660Ti OC Power Edition video card ships with a base clock of 1019 MHz and 6008 MHz memory clock. The GTX 660Ti OC Power Edition, much like the high-end enthusiast class Lightning series video cards, is capable of MSI’s triple overvoltage feature and has an enhanced 5+2 PWM design for superior overclocking performance.

http://www.hitechlegion.com/reviews/...i-660ti-pow-oc