WD Caviar Blue SATA Hard Drives 640 GB, SATA 3 Gb/s, 16 MB Cache, 7200 RPM
Performance Specifications Transfer Rates Buffer To Host (Serial ATA) 3 Gb/s (Max) Physical Specifications Formatted Capacity 640,135 MB Capacity 640 GB Interface SATA 3 Gb/s User Sectors Per Drive 1,250,263,728 Physical Dimensions English Height 1.028 Inches Length 5.787 Inches Width 4.00 Inches Weight 1.39 Pounds Metric Height 25.4 mm Length 147 mm Width 101.6 mm Weight 0.63 kg Environmental Specifications Shock Operating Shock (Read) 30G, 2 ms Non-operating Shock 300G, 2 ms Acoustics Idle Mode 25 dBA (average) Seek Mode 0 29 dBA (average) Seek Mode 3 26 dBA (average) Temperature (English) Operating 41° F to 140° F Non-operating -40° F to 158° F Temperature (Metric) Operating 5° C to 60° C Non-operating -40° C to 70° C Humidity Operating 5-95% RH non-condensing Non-operating 5-95% RH non-condensing Altitude (English) Operating -1,000 feet to 10,000 feet Non-operating -1,000 feet to 40,000 feet Altitude (Metric) Operating -305M to 3,050M Non-operating -305M to 12,200M Vibration Operating Linear 20-300 Hz, 0.75 G (0 to peak) Random 0.004 g²/Hz (10 to 300 Hz) Non-operating Low Frequency 10-300 Hz, 0.195 inches (double amplitude) High Frequency 20-500 Hz, 4.0G (0 to peak) Electrical Specifications Current Requirements 12 VDC Read/Write 410 mA Idle 390 mA Standby 6 mA Sleep 6 mA 5 VDC Read/Write 675 mA Idle 600 mA Standby 180 mA Sleep 180 mA Power Dissipation Read/Write 8.30 Watts Idle 7.70 Watts Standby 1.00 Watts Sleep 1.00 Watts As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.
Performance and reliability for everyday computing.
With SATA and PATA interfaces and cache sizes up to 32 MB, this series of drives offer a full range of performance features. Pick the drive that suits your needs with the confidence in knowing that all WD Caviar Blue drives are built to the highest standards of quality and reliability.