CompUSA has an Antec EarthWatts 500 Watt ATX12V v2.0 Power Supply for $39.99 after $40 rebate with Free Shipping.
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- EarthWatts is available in three highly efficient models-380 Watt, 430 Watt, and 500 Watt-and are all 80 PLUS certified, the newest standard in power supply efficiency