From the ManufacturerWD AV-GP Hard Drives - AV-class storage thermally optimized for always-on, audio/video streaming environments.WD AV-GP hard drives with exclusive SilkStream technology deliver smooth, continuous digital video recording and playback in high-temperature, always-on audio/video environments. With 24x7 reliability and ultra-cool operation, these drives are perfect for video surveillance systems, DVRs and media servers.Exclusive SilkStream technology.Optimized for smooth, continuous digital video playback of up to twelve simultaneous HD streams.24x7 reliability.These drives are designed to last in high-temperature, always-on, streaming digital audio/video environments such as video surveillance systems, PVR/DVR and IPTV. Ultra-cool operation.WD AV-GP drives consume less power during operation which means less heat and greater reliability in harsh read/write environments.Perfect video surveillance storage.WD AV-GP drives enable digital video surveillance systems to deliver a comprehensive range of features and capabilities such as high resolution image quality, 24x7 streaming video from multiple cameras, video archiving with ultra-fast data access and smooth, on-demand video playback.Ultimate performance for multimedia appliances.With high capacity to store ultra-rich HD content and the ability to capture multiple simultaneous video streams, WD AV-GP is the clear choice for your media applications like set top boxes, DVRs and digital signage.SilkStream technology.Optimized for smooth, continuous digital video playback of multiple simultaneous HD streams. SilkStream is compatible with the ATA streaming command set so CE customers can use standard streaming management and error recovery options.Ultra-cool for greater reliability.With reduced power consumption, WD AV-GP drives are designed to produce less heat which makes them more reliable for the high demands of read/write environments.Whisper quiet.Noise levels have been minimized to less than one sone - virtually below the threshold of human hearing. With WD AV-GP, silence is golden.Preemptive Wear Leveling (PWL).The drive arm frequently sweeps across the disk to reduce uneven wear on the drive surface common to audio/video streaming applications.WD-certified packaging.All WD drives purchased from Amazon.com are shipped in WD-certified hard drive packaging. It is designed and fully tested to provide WD products with the highest of safety while in transit. With WD-certified packaging, you can rest assured that your WD hard drive will arrive safely, fully protected, in an environmentally-friendly, non-descript, easy-open package. Ideal for: Always-on video surveillance systems for small businesses Managing multiple simultaneous audio/video streams Use in high-temperature, 24x7 video streaming environments DVRs, PVRs and media appliances needing cool, quiet operationFeatures at a glance Exclusive SilkStream technology 24x7 reliability for always-on video streaming Reduced power consumption for ultra-cool operation Whisper quiet You might also consider:AV Hard DrivesComparison Chart WD AV-GP WD AV-25 24x7 reliability for video streaming. Engineered to thrive in 24x7 streaming environments. Capacity 160 GB - 3 TB 160 GB - 1 TB Interface SATA 6 Gb/s, SATA 3 Gb/s SATA 3 Gb/s Form Factor 3.5-inch 2.5-inch Cache 8 MB - 64 MB 16 MB - 32 MBProduct DescriptionPower-conserving WD AV-GP hard drives are based on the WD GreenPower Technology platform designed to deliver power savings as the primary attribute. These SATA drive are equipped with IntelliPower technology, fine-tuned balance of spin speed, transfer rate, and caching algorithms designed to deliver both significant power savings and solid performance. With power reduction of up to 40 percent, they deliver cool and quiet operation and reliability that is perfect for audio video applications such as PVRs, DVRs, set-top boxes (STBs) as well as surveillance video recording.