Energy-Saving Hard Drives
These hard drives are not meant to break new records in performance, but they might be able to break records when it comes to storage capacity per watt of power used. Both Hitachi Global Storage Technologies (HGST) and Western Digital have now released disk drives that cater to the power-conscious audience. The Hitachi Deskstar P7K500 and the WD GreenPower series reduce power consumption by up to 40% compared to conventional hard drives. We wanted to know what the impact on performance was of these design changes, which must not be significant for these products to be accepted in the market.
Looking at power requirements of 50 to 120 W for TFT displays, 20 to 120 W for processors, 25 to 200 W for discrete graphics solutions, up to 50 W for high-end motherboards and another 10 to 20% of the component power requirements due to losses in the power supply, a discussion of hard drive power requirements might seems of little interest. After all, the typical power consumption of a desktop hard drive lies anywhere between 5 and 15 W, depending on the model, spindle speed and platter count. In fact, choosing one drive or another does seem to have little impact on the power consumption of a desktop PC.
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