WD Caviar Green Cool, quiet, eco-friendly. 1.5 TB - WD Caviar Green SATA hard drives reduce power consumption by up to 40% and offer best-in-class acoustics and operating temperature. Based on WD's exclusive GreenPower technology, these drives are ideal for PCs, external storage, and other devices that require lower power consumption and cool, quiet operation. - Reduced power consumption - Environmentally responsible - Cool and quiet - Windows 2000/XP/Vista Note: Compatibility may vary depending on user's hardware configuration and operating system.