Product Description Seagate Momentus 5400 320GB 5400RPM SATA 3Gb/s 8MB Cache 2.5 Inch Internal NB Hard Drive ST9320325AS-Bare Drive From the Manufacturer Seagate Momentus 2.5" Internal Hard Drive Energy Efficient, High Capacity Storage Engineered specifically for low-power applications, the Momentus internal drive has a 5400RPM spindle speed and a 8MB cache to provide energy-efficient performance at whisper-quiet acoustic levels. With reduced power consumption and heat generation, this drive will reduce power costs up to 50% over the life of the system compared to standard drives. It is optimized for standard laptops and small form factor PCs. Robust design and high shock tolerance enable mobility in rugged environments Durable Mobility Anywhere, Anytime Momentus is the world's most feature-rich 2.5-inch drive for laptop upgrades and external enclosures. The Momentus drive family offers innovative options, capacities to 750GB, two performance speeds and significant feature options. The Seagate Momentus drives are perfect for any standard laptop and meet your specific upgrade needs, whether it's more capacity, higher performance, lower power consumption, more security, or greater reliability. With speeds of 5400 RPM, the Momentus series brings quality and reliability to high-performance laptops, workstations, and gamer systems, as well as mainstream laptops, netbooks and external storage enclosures. Momentus drives are ideal for any consumer solution where robustness and data reliability are a necessity. The best combination of performance, capacity, mobility and durability in a laptop hard drive Momentus Series Technology Features SmartAlign Technology for Easy 4K Migration A change is coming to the hard drive industry. The smallest sector of organized data on a drive is moving from 512 to 4,096 bytes. The new format, known as Advanced Format (AF) 4K, offers advantages like increased efficiency, but migrating your drive can be challenging. Luckily, Seagate is ready to help you make a seamless transition to 4K sectors. Seagate's SmartAlign technology automatically does the work of AF migration in the background. The drive's performance is not affected, and there is no need for time-consuming utilities required by other AF-enabled drives. Seagate Momentus 2.5-Inch Drive Specifications Momentus 5400 Drives Momentus 7200 Drives 1 1 1 1 1 1 1 1 Interface SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ Cache (MB) 16 8 8 8 16 16 16 16 How Much Will it Store? Digital Music (Hours) 12,495 8,330 5,331 4,165 12,495 8,330 5,331 4,165 Digital Photos (Files)Average file size using cameras highest resolution JPEG mode 240,000 160,000 102,400 80,000 240,000 160,000 102,000 80,000 Digital Videos (Hours) 750 500 320 250 750 500 320 250 DVD Quality (Movies)Based on standard 2 hour movie 187 125 80 63 187 125 80 63 HD Video (Hours)Based on H.264 compression at a 6.75Mbs bitrate 187 125 80 63 187 125 80 63 1One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes when referring to drive capacity.