SEAGATE Momentus 5400 RPM 640GB Mobile SATA 3GB/S 8MB Cache

R1,045.00

Seagate SmartAlign™ technology provides a transition to 4K sectors without the need for software utilities.
Seagate Self-Encrypting Drives deliver government-grade encryption without performance degradation—protecting your data where it lives. The FIPS 140-2* options are NIST government-certified for both U.S. and Canadian usage with sensitive data.**
Seagate G-Force Protection™ technology can detect when your laptop is in a free-fall, swing the drive heads to a safe zone and keep the data safe.
7200-RPM and 5400-RPM speeds for customized performance, and 8MB and 16MB cache size to enhance your application performance
750, 640, 500, 320, 250 and 160GB models for 5400-RPM drives for high-capacity to entry-level and mainstream systems
750, 500, 320, 250 and 160GB models for 7200-RPM drives for high-capacity and high-performance systems

Specifications
Model Number	ST9640320AS
Interface	SATA 3Gb/s
Cache	8MB
Capacity	640GB
Areal density (avg)	507Gb/in²
Guaranteed Sectors	1,250,263,728
PHYSICAL
Height	9.5mm (0.374 in)
Width	69.85mm (2.75 in)
Length	100.35mm (3.951 in)
Weight (typical)	100g (.220 lb)
PERFORMANCE
Spin Speed (RPM)	5400 RPM
Average latency	5.2ms
Random read seek time	13.0ms
I/O data transfer rate	300MB/s
Unrecoverable read errors	1 in 10¹⁴
RELIABILITY
Annual Failure Rate	0.48%
POWER
5V start max current	1.0A
Average idle power	0.68W
Average operating power	1.25W
Average seek power	1.3W
ENVIRONMENT
Ambient Temperature
Operating	0°–60°C
Nonoperating	-40°–70°C
Maximum operating temperature change	20°C per hour
Maximum nonoperating temperature change	35°C per hour
Shock
Operating Shock (max)	350 Gs for 2ms
Nonoperating Shock (max)	1000 Gs for 1ms
ACOUSTICS
Acoustics (Idle Volume)	2.4 bels
Acoustics (Seek Volume)	2.6 bels
Features
Storage Type	HDD