Product comparison · 2 internal hard drives

Seagate Constellation ST91000640NS-40PK internal hard drive vs Seagate Constellation ST9250610NS-40PK internal hard drive

Key differences

HDD capacity
- Constellation ST91000640NS-40PK internal hard drive:1 TB
- Constellation ST9250610NS-40PK internal hard drive:250 GB
Power consumption (typical)
- Constellation ST91000640NS-40PK internal hard drive:5.21 W
- Constellation ST9250610NS-40PK internal hard drive:4.35 W
Power consumption (idle)
- Constellation ST91000640NS-40PK internal hard drive:3.31 W
- Constellation ST9250610NS-40PK internal hard drive:2.52 W
Weight
- Constellation ST91000640NS-40PK internal hard drive:200 g
- Constellation ST9250610NS-40PK internal hard drive:179 g

Differences highlightedShow differences only

Comparison of ST91000640NS-40PK, ST9250610NS-40PK
27 specifications	A Seagate Constellation ST91000640NS-40PK internal hard drive Model ST91000640NS-40PK View product	B Seagate Constellation ST9250610NS-40PK internal hard drive Model ST9250610NS-40PK View product
Features1 differ
HDD capacityDiffers	1 TB	250 GB
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 size	64 MB	64 MB
Read seek time	8.5 ms	8.5 ms
Write seek time	9.5 ms	9.5 ms
Average latency	4.16 ms	4.16 ms
Mean time between failures (MTBF)	1400000 h	1400000 h
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Power2 differ
Power consumption (typical)Differs	5.21 W	4.35 W
Power consumption (idle)Differs	3.31 W	2.52 W
Operating voltage	5 V	5 V
Operational conditionsidentical
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating shock	70 G	70 G
Non-operating shock	400 G	400 G
Packaging contentidentical
ManualKnown for one	Yes	Unknown — not stated by the source
Quick start guideKnown for one	Yes	Unknown — not stated by the source
Weight & dimensions1 differ
Width	70.1 mm	70.1 mm
Depth	100.5 mm	100.5 mm
Height	15 mm	15 mm
WeightDiffers	200 g	179 g
Packaging dataidentical
Quantity per pack	40 pc(s)	40 pc(s)
Other featuresidentical
Data transfer rate	6 Gbit/s	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.