The Cheetah 15K.3 Economies of Speed Technology Paper describes how Seagate 15K-RPM drives benefit end users through increased performance over 10K-RPM drives. However, the real benefits are more significant than the obvious ones seen in a 34% disc drive performance increase. Featured in this paper are total-cost-of-ownership (TCO) savings that users can realize by using 15K RPM?allowing users to lower their overall system costs by meeting current levels of capacity and performance, while actually purchasing less drives.