Seagate Hard Drive 320 Sata_3_0_gb 8 MB Cache 3.5" Internal Bare or OEM Drives ST3320311CS PVR acoustic profile as low as 19dB supports bedroom and living room system usage models Operational power consumption as low as 4.7W for greater energy efficiency and reduced heat generation Proven Seagate reliability Low-current spin-up for ease of integration and power supply design Available Seagate Secure technology improves content security as part of a system digital rights management strategy Seagate Soft Sonic motor technology and optimized seek profiles enable years of quiet, worry-free operation 320 GB storage capacity with an 8 MB cache Features SATA 3Gb/s NCQ interface Optomized for high-definition consumer and DVR applications Easy-to-manage multi-room video delivery of up to 16 simultaneous HD streams 24x7 operational profile to meet the always -on-demands of the DVR market Designed to meet Energy Star and other consumer power standards