Western Digital 3 TB SATA II Intellipower 64 MB Cache Bulk/OEM Desktop Hard Drive - WD30EZRSDTL 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 designed to deliver both significant power savings and solid performance. IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration. Drives with capacities greater than 2TB may be incompatible with your computer. 3 year limited warranty.