Product comparison · 2 internal hard drives

Seagate 320GB 3.5" Ultra ATA/100 vs Seagate 80GB 3.5" SATA II

Key differences

HDD capacity
- 320GB 3.5" Ultra ATA/100:320 GB
- 80GB 3.5" SATA II:80 GB
Interface
- 320GB 3.5" Ultra ATA/100:Ultra-ATA/100
- 80GB 3.5" SATA II:Serial ATA II
Storage drive buffer size
- 320GB 3.5" Ultra ATA/100:16 MB
- 80GB 3.5" SATA II:2 MB
HDD number of heads
- 320GB 3.5" Ultra ATA/100:4
- 80GB 3.5" SATA II:2
Mean time between failures (MTBF)
- 320GB 3.5" Ultra ATA/100:700000 h
- 80GB 3.5" SATA II:600000 h
Operating shock
- 320GB 3.5" Ultra ATA/100:68 G
- 80GB 3.5" SATA II:63 G
Depth
- 320GB 3.5" Ultra ATA/100:147 mm
- 80GB 3.5" SATA II:146.9 mm
Height
- 320GB 3.5" Ultra ATA/100:26.1 mm
- 80GB 3.5" SATA II:26 mm

Differences highlightedShow differences only

Comparison of 320GB 3.5" Ultra ATA/100, 80GB 3.5" SATA II
33 specifications	A Seagate 320GB 3.5" Ultra ATA/100 View product	B Seagate 80GB 3.5" SATA II View product
Features5 differ
HDD capacityDiffers	320 GB	80 GB
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Storage drive buffer sizeDiffers	16 MB	2 MB
HDD number of headsDiffers	4	2
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Start/stop cyclesKnown for one	50000	Unknown — not stated by the source
Mean time between failures (MTBF)Differs	700000 h	600000 h
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	9.5 ms
Poweridentical
Power consumption (idle)Known for one	9.3 W	Unknown — not stated by the source
Power consumption (read)Known for one	13 W	Unknown — not stated by the source
Power consumption (write)Known for one	13 W	Unknown — not stated by the source
Operational conditions1 differ
Operating shockDiffers	68 G	63 G
Weight & dimensions2 differ
DepthDiffers	147 mm	146.9 mm
HeightDiffers	26.1 mm	26 mm
Other featuresidentical
Acoustic pressure emissionsKnown for one	2.7 dB	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.