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Press Release

RACKABLE SYSTEMS PRICES INITIAL PUBLIC OFFERING

MILPITAS, CALIF. – June 10, 2005 – Rackable Systems, Inc., (Nasdaq: RACK) today announced the initial public offering of 6,250,000 shares of its common stock priced at $12.00 per share on the NASDAQ National Market under the trading symbol "RACK". Certain stockholders of Rackable Systems have granted the underwriters the right to purchase up to an additional 937,500 shares of common stock to cover over allotments, if any. Rackable Systems will not receive any proceeds from the sales of shares, if any, by its stockholders. The managing underwriters of the offering are Thomas Weisel Partners LLC, acting as the lead manager, and Piper Jaffray, RBC Capital Markets and Pacific Crest Securities acting as co-managers.

A final prospectus relating to the offering may be obtained from Thomas Weisel Partners LLC's prospectus department at One Montgomery Street, San Francisco, CA 94104, (415) 364-2720.

About Rackable Systems
Rackable Systems, Inc. is a provider of servers and storage products for scale out data center deployments. The company's servers are designed to provide benefits in the areas of density, thermal efficiency, serviceability, power distribution and remote management. Founded in 1999 and based in Milpitas, California, Rackable Systems serves Internet, semiconductor design, enterprise software, federal government, entertainment, financial services, oil and gas exploration and biotechnology customers worldwide.

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