Western Digital 800 GB Caviar Green SATA Intellipower 64 MB Cache Bulk/OEM Desktop Hard Drive WD8000AARS WD Caviar Green hard drives reduce power consumption by up to 40% and offer best-in-class acoustics and operating temperature. IntelliPower - A fine-tuned balance of spin speed, transfer rate and caching algorithms IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration. 800 GB capacity holds up to 200,000 digital photos, 199,000 MP3 files, and 200 hours of HD video. 2 year limited warranty.