Product comparison · 2 internal hard drives

Seagate 120GB 3.5" SATA II vs Seagate 80GB 3.5" Ultra ATA/100

27specifications compared
9differ
18identical
7known for one product only

Key differences

The Seagate 120GB 3.5" SATA II has 40 GB more HDD capacity than the Seagate 80GB 3.5" Ultra ATA/100 (120 GB vs 80 GB). The Seagate 120GB 3.5" SATA II has 1,800 RPM more HDD speed than the Seagate 80GB 3.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 120GB 3.5" SATA II has 1 MB more storage drive buffer size than the Seagate 80GB 3.5" Ultra ATA/100 (2 MB vs 1 MB). Interface: Serial ATA II on the Seagate 120GB 3.5" SATA II, Ultra-ATA/100 on the Seagate 80GB 3.5" Ultra ATA/100.

HDD capacity
- 120GB 3.5" SATA II:120 GB
- 80GB 3.5" Ultra ATA/100:80 GB
HDD speed
- 120GB 3.5" SATA II:7200 RPM
- 80GB 3.5" Ultra ATA/100:5400 RPM
Interface
- 120GB 3.5" SATA II:Serial ATA II
- 80GB 3.5" Ultra ATA/100:Ultra-ATA/100
Storage drive buffer size
- 120GB 3.5" SATA II:2 MB
- 80GB 3.5" Ultra ATA/100:1 MB
Read seek time
- 120GB 3.5" SATA II:8 ms
- 80GB 3.5" Ultra ATA/100:8.5 ms
Write seek time
- 120GB 3.5" SATA II:9 ms
- 80GB 3.5" Ultra ATA/100:9.5 ms
Start-up current
- 120GB 3.5" SATA II:2.6 A
- 80GB 3.5" Ultra ATA/100:2.8 A
Height
- 120GB 3.5" SATA II:26.1 mm
- 80GB 3.5" Ultra ATA/100:26 mm

Side by side

Differences highlightedShow differences only

Comparison of 120GB 3.5" SATA II, 80GB 3.5" Ultra ATA/100
34 specifications	A Seagate 120GB 3.5" SATA II View product	B Seagate 80GB 3.5" Ultra ATA/100 View product
Features6 differ
HDD capacityDiffers	120 GB	80 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA II	Ultra-ATA/100
Type	HDD	HDD
Storage drive buffer sizeDiffers	2 MB	1 MB
HDD number of cylinders	16383	16383
Read seek timeDiffers	8 ms	8.5 ms
Write seek timeDiffers	9 ms	9.5 ms
Average latency	4.16 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Start/stop cycles	50000	50000
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	600000 h
HDD number of headsKnown for one	16	Unknown — not stated by the source
Power1 differ
Power consumption (standby)Known for one	Unknown — not stated by the source	0.9 W
Power consumption (idle)Known for one	Unknown — not stated by the source	7.5 W
Power consumption (read)Known for one	Unknown — not stated by the source	12 W
Power consumption (write)Known for one	Unknown — not stated by the source	12 W
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.6 A	2.8 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
Weight & dimensions2 differ
Width	101.6 mm	101.6 mm
Depth	147 mm	147 mm
HeightDiffers	26.1 mm	26 mm
WeightDiffers	580 g	635 g
Other featuresidentical
Windows operating systems supported	Yes	Yes
Linux operating systems supported	Yes	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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