Excerpt from http://www.storagereview.com/

In conclusion, the delivers mightily on all fronts: the lowest access times, the highest transfer rates, the highest WinBench 99 scores, and the highest IOMeter scores that we\'ve yet recorded. That it does so with lowered noise floors is all the more impressive. There are only two drawbacks involved. The first regards heat. Though its not nearly as hot as the scalding IBM Ultrastar 36Z15, the X15-36LP does seem to run hotter than its predecessor, somewhat disappointing considering its reduced platter count. Price is the other factor… the drive runs upwards of 40% more than a 10k RPM drive featuring the same capacity. These two quibbles, however, are minor indeed in the eyes of targeted users. Make no mistake about it, the Cheetah X15-36LP is the fastest hard drive one can buy for any and all applications. Period