Product comparison · 2 internal hard drives

Seagate 160GB 3.5" Ultra ATA/100 vs Seagate 40GB 3.5" Ultra ATA/100

Key differences

The Seagate 160GB 3.5" Ultra ATA/100 has 120 GB more HDD capacity than the Seagate 40GB 3.5" Ultra ATA/100 (160 GB vs 40 GB).

Differences highlightedShow differences only

Comparison of 160GB 3.5" Ultra ATA/100, 40GB 3.5" Ultra ATA/100
30 specifications	A Seagate 160GB 3.5" Ultra ATA/100 View product	B Seagate 40GB 3.5" Ultra ATA/100 View product
Features1 differ
HDD capacityDiffers	160 GB	40 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
Interface	Ultra-ATA/100	Ultra-ATA/100
Type	HDD	HDD
Storage drive buffer size	2 MB	2 MB
HDD number of cylinders	16383	16383
HDD number of heads	16	16
Read seek time	11 ms	11 ms
Write seek time	12 ms	12 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
Poweridentical
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentKnown for one	Unknown — not stated by the source	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 & dimensionsidentical
Width	101.6 mm	101.6 mm
Depth	146.9 mm	146.9 mm
Height	26 mm	26 mm
Weight	580 g	580 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)	2	2
Drive devices burst data transfer rate (PIO)	4	4
Drive devices burst data transfer rate (Ultra DMA)	5	5

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.