As hard drive capacities increase, the power required to run those drives increases as well. WD Caviar Green drives make it possible for energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation. Reduced power consumption - WD has reduced power consumption by up to 40 percent compared to standard desktop drives with the combination of WD's IntelliSeek, NoTouch, and IntelliPower technologies. Helps enable eco-friendly PCs - WD Caviar Green drives yield an average drive power savings of 4-5 watts over standard desktop drives making it possible for our energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation. Cool and quiet - GreenPower technology yields lower operating temperatures for increased reliability and low acoustics for ultra-quiet PCs and external drives. Massive capacity - Capacities up to 1 TB offer the most available capacity for storage-intensive programs and space-hungry operating systems, like Window Vista, with plenty of room left over for photos, music, and video. Perfect for external drives - External drive manufacturers can eliminate the need for a fan in a high-capacity product with a WD Caviar Green drive, the coolest and quietest in its class. IntelliPower - A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance. IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration. View demo > NoTouch ramp load technology - The recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit. Perpendicular Magnetic Recording (PMR) - Employs PMR technology to achieve even greater areal density. Low power spin-up - WD Caviar Green drives consume less current during startup allowing lower peak loads. Advanced power technology - Electronic components deliver best-in-class low power consumption for reduced power requirements and increased reliability. Ideal For Environmentally friendly PCs and external storage requiring lower power consumption and cool, quiet operation. Specifications: Manufacturer Western Digital Manufacturer Part # WD10EADS Data Storagefont> Formatted Capacity  1TB Data Transfer Rate ToTo/From Media 300 Mbps Buffer 32 MB Seek Time font>  Average 8.9 ms Rotational Speed 7200 rpm InInterface SATA 3 Gb/s Dimensionsr> (H x W x D) Unit 4 in x 5.8 in x 1 in Weight Unit 1.1.4 lbs Warrantyfont> 3 Year Warranty Includes in the Box Sealed Bulk Pack