S.129: A bill to study and promote the use of energy-efficient computer servers in the United States.

Requires the Administrator of the Environmental Protection Agency (EPA), through the Energy Star program, to analyze and report to Congress on the growth and energy consumption of computer data centers by the federal government and private enterprise.

Expresses the sense of Congress that it is in the United States' best interest for purchasers of computer servers to give high priority to energy efficiency as a factor in determining best value and performance for purchases of servers.