Product comparison · 2 internal hard drives

Seagate 40GB 3.5 vs Seagate 80GB 3.5

Key differences

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
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Storage drive buffer sizeDiffers	2 MB	8 MB
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
Power1 differ
Start-up currentDiffers	2.8 A	2.6 A
Packaging contentidentical
Storage drive adapter includedKnown for one	No	Unknown — not stated by the source
Weight & dimensions2 differ
DepthDiffers	146.9 mm	147 mm
HeightDiffers	26 mm	26.1 mm
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.