Product comparison · 2 internal hard drives

Seagate 640GB SATA II vs Seagate Momentus, 1TB

11specifications compared
5differ
6identical
23known for one product only

Key differences

HDD capacity
- 640GB SATA II:640 GB
- Momentus, 1TB:1 TB
Operating temperature (T-T)
- 640GB SATA II:5 - 55 °C
- Momentus, 1TB:5 - 60 °C
Storage temperature (T-T)
- 640GB SATA II:-40 - 70 °C
- Momentus, 1TB:-20 - 60 °C
Operating relative humidity (H-H)
- 640GB SATA II:10 - 90%
- Momentus, 1TB:5 - 90%
Storage relative humidity (H-H)
- 640GB SATA II:5 - 95%
- Momentus, 1TB:5 - 90%

Side by side

Differences highlightedShow differences only

Comparison of 640GB SATA II, Momentus, 1TB
34 specifications	A Seagate 640GB SATA II View product	B Seagate Momentus, 1TB View product
Features1 differ
HDD capacityDiffers	640 GB	1 TB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
Interface	Serial ATA II	Serial ATA II
Component for	Laptop	Laptop
Storage drive buffer sizeKnown for one	8 MB	Unknown — not stated by the source
Read seek timeKnown for one	12 ms	Unknown — not stated by the source
Average latencyKnown for one	5.6 ms	Unknown — not stated by the source
SMART technologyKnown for one	Yes	Unknown — not stated by the source
Poweridentical
Power consumption (idle)Known for one	0.7 W	Unknown — not stated by the source
Power consumption (read)Known for one	2.2 W	Unknown — not stated by the source
Power consumption (write)Known for one	2.2 W	Unknown — not stated by the source
Operating voltage	5 V	5 V
Start-up currentKnown for one	1 A	Unknown — not stated by the source
Operational conditions4 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Storage temperature (T-T)Differs	-40 - 70 °C	-20 - 60 °C
Operating relative humidity (H-H)Differs	10 - 90%	5 - 90%
Storage relative humidity (H-H)Differs	5 - 95%	5 - 90%
Operating vibrationKnown for one	1.5 G	Unknown — not stated by the source
Operating altitudeKnown for one	-300 - 3000 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-400 - 15000 m	Unknown — not stated by the source
Operating shockKnown for one	325 G	Unknown — not stated by the source
Non-operating shockKnown for one	750 G	Unknown — not stated by the source
Weight & dimensionsidentical
WidthKnown for one	69.8 mm	Unknown — not stated by the source
DepthKnown for one	100.3 mm	Unknown — not stated by the source
HeightKnown for one	9.5 mm	Unknown — not stated by the source
WeightKnown for one	107 g	Unknown — not stated by the source
Packaging dataidentical
Quantity per packKnown for one	1 pc(s)	Unknown — not stated by the source
Other featuresidentical
Data transfer rate	3 Gbit/s	3 Gbit/s
Drive ready timeKnown for one	4 s	Unknown — not stated by the source
InternalKnown for one	Unknown — not stated by the source	Yes
Number of products includedKnown for one	Unknown — not stated by the source	1 pc(s)
Windows operating systems supportedKnown for one	Unknown — not stated by the source	Yes
Linux operating systems supportedKnown for one	Unknown — not stated by the source	Yes

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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