Product comparison · 2 internal hard drives

Seagate 2TB SATA HDD vs Seagate 400GB 3.5

16specifications compared
9differ
7identical
18known for one product only

Key differences

HDD capacity
- 2TB SATA HDD:2 TB
- 400GB 3.5:400 GB
Interface
- 2TB SATA HDD:Serial ATA III
- 400GB 3.5:Serial ATA II
Storage drive buffer size
- 2TB SATA HDD:64 MB
- 400GB 3.5:16 MB
HDD number of heads
- 2TB SATA HDD:6
- 400GB 3.5:5
Bytes per sector
- 2TB SATA HDD:4096
- 400GB 3.5:512
Start-up current
- 2TB SATA HDD:2.5 A
- 400GB 3.5:2 A
Width
- 2TB SATA HDD:101 mm
- 400GB 3.5:101.6 mm
Height
- 2TB SATA HDD:26 mm
- 400GB 3.5:26.1 mm

Side by side

Differences highlightedShow differences only

Comparison of 2TB SATA HDD, 400GB 3.5
34 specifications	A Seagate 2TB SATA HDD View product	B Seagate 400GB 3.5 View product
Features5 differ
HDD capacityDiffers	2 TB	400 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA III	Serial ATA II
Type	HDD	HDD
Storage drive buffer sizeDiffers	64 MB	16 MB
HDD number of cylindersKnown for one	Unknown — not stated by the source	16383
HDD number of headsDiffers	6	5
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	10 ms
Average latencyKnown for one	Unknown — not stated by the source	4.16 ms
Bytes per sectorDiffers	4096	512
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Power1 differ
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.5 A	2 A
Power consumption (typical)Known for one	8 W	Unknown — not stated by the source
Power consumption (standby)Known for one	0.75 W	Unknown — not stated by the source
Power consumption (idle)Known for one	5.8 W	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 90%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating altitudeKnown for one	Unknown — not stated by the source	-60.96 - 3048 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-60.96 - 12192 m
Operating shockKnown for one	Unknown — not stated by the source	68 G
Non-operating shockKnown for one	Unknown — not stated by the source	300 G
Weight & dimensions3 differ
WidthDiffers	101 mm	101.6 mm
Depth	147 mm	147 mm
HeightDiffers	26 mm	26.1 mm
WeightDiffers	626 g	635 g
Other featuresidentical
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
Data transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
InternalKnown for one	Yes	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.

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