Product comparison · 2 internal hard drives

Seagate 1 TB, 2.5", SATA 6Gb/s vs Seagate Constellation ST91000641NS-40PK internal hard drive

Key differences

Storage drive buffer size
- 1 TB, 2.5", SATA 6Gb/s:128 MB
- Constellation ST91000641NS-40PK internal hard drive:64 MB
Bytes per sector
- 1 TB, 2.5", SATA 6Gb/s:4096
- Constellation ST91000641NS-40PK internal hard drive:512
Power consumption (idle)
- 1 TB, 2.5", SATA 6Gb/s:3.51 W
- Constellation ST91000641NS-40PK internal hard drive:3.31 W
Operating temperature (T-T)
- 1 TB, 2.5", SATA 6Gb/s:5 - 55 °C
- Constellation ST91000641NS-40PK internal hard drive:5 - 60 °C
Operating shock
- 1 TB, 2.5", SATA 6Gb/s:25 G
- Constellation ST91000641NS-40PK internal hard drive:70 G
Weight
- 1 TB, 2.5", SATA 6Gb/s:190 g
- Constellation ST91000641NS-40PK internal hard drive:200 g

Differences highlightedShow differences only

Comparison of 1 TB, 2.5", SATA 6Gb/s, ST91000641NS-40PK
27 specifications	A Seagate 1 TB, 2.5", SATA 6Gb/s View product	B Seagate Constellation ST91000641NS-40PK internal hard drive Model ST91000641NS-40PK View product
Features2 differ
HDD capacity	1 TB	1 TB
HDD speed	7200 RPM	7200 RPM
HDD size	2.5"	2.5"
Interface	Serial ATA III	Serial ATA III
Type	HDD	HDD
Storage drive buffer sizeDiffers	128 MB	64 MB
Average latency	4.16 ms	4.16 ms
Bytes per sectorDiffers	4096	512
Mean time between failures (MTBF)	1400000 h	1400000 h
Read seek timeKnown for one	Unknown — not stated by the source	8.5 ms
Write seek timeKnown for one	Unknown — not stated by the source	9.5 ms
Power1 differ
Power consumption (standby)Known for one	1.14 W	Unknown — not stated by the source
Power consumption (idle)Differs	3.51 W	3.31 W
Power consumption (read)Known for one	4.74 W	Unknown — not stated by the source
Operating voltage	5 V	5 V
Power consumption (typical)Known for one	Unknown — not stated by the source	5.21 W
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating shockDiffers	25 G	70 G
Non-operating shock	400 G	400 G
Weight & dimensions1 differ
Width	70.1 mm	70.1 mm
Depth	100.5 mm	100.5 mm
Height	15 mm	15 mm
WeightDiffers	190 g	200 g
Packaging dataidentical
Quantity per pack	40 pc(s)	40 pc(s)
Logistics dataidentical
Products per palletKnown for one	50 pc(s)	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.