Product comparison · 2 internal hard drives

Seagate 40GB 3.5 vs Seagate 80GB 3.5

26specifications compared
8differ
18identical
9known for one product only

Key differences

HDD capacity
- 40GB 3.5:40 GB
- 80GB 3.5:80 GB
Interface
- 40GB 3.5:Ultra-ATA/100
- 80GB 3.5:Serial ATA II
Storage drive buffer size
- 40GB 3.5:2 MB
- 80GB 3.5:8 MB
Read seek time
- 40GB 3.5:11 ms
- 80GB 3.5:9.5 ms
Write seek time
- 40GB 3.5:12 ms
- 80GB 3.5:10.5 ms
Start-up current
- 40GB 3.5:2.8 A
- 80GB 3.5:2.6 A
Depth
- 40GB 3.5:146.9 mm
- 80GB 3.5:147 mm
Height
- 40GB 3.5:26 mm
- 80GB 3.5:26.1 mm

Side by side

Differences highlightedShow differences only

Comparison of 40GB 3.5, 80GB 3.5
35 specifications	A Seagate 40GB 3.5 View product	B Seagate 80GB 3.5 View product
Features5 differ
HDD capacityDiffers	40 GB	80 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Type	HDD	HDD
Storage drive buffer sizeDiffers	2 MB	8 MB
HDD number of cylinders	16383	16383
HDD number of headsKnown for one	16	Unknown — not stated by the source
Read seek timeDiffers	11 ms	9.5 ms
Write seek timeDiffers	12 ms	10.5 ms
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Power1 differ
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.8 A	2.6 A
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)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating altitude	-60.96 - 3048 m	-60.96 - 3048 m
Non-operating altitude	-60.96 - 12192 m	-60.96 - 12192 m
Operating shock	63 G	63 G
Non-operating shock	350 G	350 G
Packaging contentidentical
Storage drive adapter includedKnown for one	No	Unknown — not stated by the source
Weight & dimensions2 differ
Width	101.6 mm	101.6 mm
DepthDiffers	146.9 mm	147 mm
HeightDiffers	26 mm	26.1 mm
Weight	580 g	580 g
Packaging dataidentical
Quantity per packKnown for one	1 pc(s)	Unknown — not stated by the source
Other featuresidentical
Drive devices burst data transfer rate (DMA)Known for one	2	Unknown — not stated by the source
Drive devices burst data transfer rate (PIO)Known for one	4	Unknown — not stated by the source
Drive devices burst data transfer rate (Ultra DMA)Known for one	5	Unknown — not stated by the source
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
Acoustic pressure emissionsKnown for one	Unknown — not stated by the source	25 dB

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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