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Western Digital has added more "Green" hard drives to their hardware offerings, with the introduction of several new Caviar Green drives. The 3.5" drives are heralded as very power-efficient and quiet, with the low power consumption being their biggest selling point. Based on a 333GB per-platter design, the drives are available in sizes from 500GB to 1TB. The 1TB model will have 32MB of cache, all other drives will have less.
WD claims the power reduction is as much as 20%, on top of giving a 10% performance boost, compared to the first generation Caviar Green drives. That's certainly a win-win, but since the 1TB drives start at $219, there is a price premium for the quiet and cool drives.