ADBRITE SELECTS RACKABLE SYSTEMS® SERVERS FOR HIGH PERFORMANCE, ENERGY EFFICIENCY AND SCALABILITY

Leading Advertising Marketplace Fully Utilizes Data Center Capacity While Reducing Energy Costs with Eco-Logical, High Efficiency Servers

FREMONT, Calif., December 17, 2007 – Rackable Systems, Inc. (NASDAQ: RACK), a leading provider of servers and storage for large-scale data centers, today announced that AdBrite, Inc. selected Rackable Systems’ Eco-Logical™ servers for their market-leading ratio of price/performance per watt and energy efficiency. With Rackable Systems’ build-to-order model, award-winning designs and remote management capabilities, AdBrite was able to quickly and cost-effectively deploy additional processing power in multiple global locations to support their rapidly-growing business—while saving on energy costs.

AdBrite is the third-largest ad provider in the United States (according to Comscore September 2007, measured by page-views), serving ads on over one billion Web pages a day. The company’s rapid growth and increased demand on back-end infrastructure drove AdBrite to choose Rackable Systems’ AMD Opteron-based high density servers to deploy in multiple locations around the world.

“As a rapidly-growing advertising marketplace, AdBrite must stay a step ahead of the computing demands that our growing business puts on our data centers,” said Mike Reaves, AdBrite’s vice president of engineering. “We evaluated various solutions, and Rackable Systems was able to rapidly build and deploy the best configuration to meet our specific needs.”

By deploying Rackable Systems’ patented back-to-back half-depth servers, AdBrite is able to increase the number of servers per rack, greatly improving the density per square foot within their existing data center footprint. AdBrite selected a combination of Rackable Systems’ high-efficiency systems based on AC power as well as the company’s patented direct and rectified DC power technology—which can help reduce heat output while increasing system reliability—to achieve higher levels of energy efficiency within their existing infrastructure. These unique server configurations, featuring higher reliability and uptime, have enabled AdBrite to provide a superior level of service for its expanding customer base.

“Power is our largest variable expense in data center operations, and Rackable Systems’ low-voltage systems allowed AdBrite to scale our operation energy-efficiently and cost-effectively,” added Reaves.

“Rackable Systems applauds AdBrite for their tremendous growth and innovation as one of the top providers of online advertising today,” said Mark J. Barrenechea, president and CEO of Rackable Systems. “We are delighted to be a strategic partner of AdBrite, and we are committed to providing cost-effective, highly efficient, build-to-order solutions to Internet leaders around the world.”

About Rackable Systems, Inc.
Rackable Systems, Inc. (NASDAQ: RACK) is a leading provider of servers and storage products for large-scale data center deployments. The company’s Eco-Logical™ products are designed to provide benefits in the areas of density, thermal efficiency, serviceability, power distribution and remote management. Founded in 1999 and based in Fremont, California, Rackable Systems is a founding member of The Green Grid and serves Internet, semiconductor design, enterprise software, federal government, entertainment, financial services, oil and gas exploration and biotechnology customers worldwide.

To learn more about Rackable Systems, visit www.rackable.com.

Contact Information:

Rackable Systems
Colette LaForce
408-240-8324
claforce@rackable.com
Schwartz Communications, Inc.
Jen Spark
415-512-0770
rackablesystems@schwartz-pr.com

Rackable Systems and Eco-Logical are trademarks or registered trademarks of Rackable Systems, Inc. All other trademarks are property of their respective holders.