Product comparison · 2 internal hard drives

Seagate 2 TB, SATA3, 7200 RPM vs Seagate Constellation ST91000640NS-40PK internal hard drive

21specifications compared
8differ
13identical
9known for one product only

Key differences

HDD capacity
- 2 TB, SATA3, 7200 RPM:2 TB
- Constellation ST91000640NS-40PK internal hard drive:1 TB
Storage drive buffer size
- 2 TB, SATA3, 7200 RPM:128 MB
- Constellation ST91000640NS-40PK internal hard drive:64 MB
Mean time between failures (MTBF)
- 2 TB, SATA3, 7200 RPM:2000000 h
- Constellation ST91000640NS-40PK internal hard drive:1400000 h
Power consumption (typical)
- 2 TB, SATA3, 7200 RPM:5.22 W
- Constellation ST91000640NS-40PK internal hard drive:5.21 W
Power consumption (idle)
- 2 TB, SATA3, 7200 RPM:3.87 W
- Constellation ST91000640NS-40PK internal hard drive:3.31 W
Operating temperature (T-T)
- 2 TB, SATA3, 7200 RPM:5 - 55 °C
- Constellation ST91000640NS-40PK internal hard drive:5 - 60 °C
Operating shock
- 2 TB, SATA3, 7200 RPM:25 G
- Constellation ST91000640NS-40PK internal hard drive:70 G
Weight
- 2 TB, SATA3, 7200 RPM:198 g
- Constellation ST91000640NS-40PK internal hard drive:200 g

Side by side

Differences highlightedShow differences only

Comparison of 2 TB, SATA3, 7200 RPM, ST91000640NS-40PK
30 specifications	A Seagate 2 TB, SATA3, 7200 RPM View product	B Seagate Constellation ST91000640NS-40PK internal hard drive Model ST91000640NS-40PK View product
Features3 differ
HDD capacityDiffers	2 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
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
Average latency	4.16 ms	4.16 ms
Mean time between failures (MTBF)Differs	2000000 h	1400000 h
Component forKnown for one	NAS	Unknown — not stated by the source
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Bytes per sectorKnown for one	4096	Unknown — not stated by the source
Power2 differ
Power consumption (typical)Differs	5.22 W	5.21 W
Power consumption (idle)Differs	3.87 W	3.31 W
Operating voltage	5 V	5 V
Power consumption (standby)Known for one	1.14 W	Unknown — not stated by the source
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
Packaging contentidentical
ManualKnown for one	Unknown — not stated by the source	Yes
Quick start guideKnown for one	Unknown — not stated by the source	Yes
Weight & dimensions1 differ
Width	70.1 mm	70.1 mm
Depth	100.5 mm	100.5 mm
Height	15 mm	15 mm
WeightDiffers	198 g	200 g
Packaging dataidentical
Quantity per pack	40 pc(s)	40 pc(s)
Other featuresidentical
Data transfer rateKnown for one	Unknown — not stated by the source	6 Gbit/s

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.

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