Hello everyone im thinking of purchasing a new laptop to play wow on and do work on such as school stuff and i would like to get some opinons, like how well it would play wow high or ultra etc, with these specs

Processor: Intel Core i7-720QM processor 1.60GHz
Memory: 4 GB DDR3 1333MHz
Storage: 640GB HDD
Optical Drive: DVD Burner
Video: 1GB Dedicated ATI Mobility Radeon HD 5730
Screen: 15.6 HD WXGA LED (1366x768)

the only thing im not sure about is the processor only clocking at 1.6GHz, any help is appreciated :)