Product comparison · 2 internal hard drives

Samsung 400GB Serial ATA II HDD, 20-pack vs Samsung 400GB Ultra-ATA/133 HDD, 20-Pk

21specifications compared
5differ
16identical
11known for one product only

Key differences

Interface
- 400GB Serial ATA II HDD, 20-pack:Serial ATA II
- 400GB Ultra-ATA/133 HDD, 20-Pk:Ultra-ATA/133
Storage drive buffer size
- 400GB Serial ATA II HDD, 20-pack:16 MB
- 400GB Ultra-ATA/133 HDD, 20-Pk:8 MB
Power consumption (typical)
- 400GB Serial ATA II HDD, 20-pack:10 W
- 400GB Ultra-ATA/133 HDD, 20-Pk:9.6 W
Power consumption (standby)
- 400GB Serial ATA II HDD, 20-pack:1.3 W
- 400GB Ultra-ATA/133 HDD, 20-Pk:0.45 W
Power requirements
- 400GB Serial ATA II HDD, 20-pack:+5V±5%;+12V±10%
- 400GB Ultra-ATA/133 HDD, 20-Pk:+5V; +12V

Side by side

Differences highlightedShow differences only

Comparison of 400GB Serial ATA II HDD, 20-pack, 400GB Ultra-ATA/133 HDD, 20-Pk
32 specifications	A Samsung 400GB Serial ATA II HDD, 20-pack View product	B Samsung 400GB Ultra-ATA/133 HDD, 20-Pk View product
Features2 differ
HDD capacity	400 GB	400 GB
HDD speed	7200 RPM	7200 RPM
HDD sizeKnown for one	Unknown — not stated by the source	3.5"
InterfaceDiffers	Serial ATA II	Ultra-ATA/133
Storage drive buffer sizeDiffers	16 MB	8 MB
Full stroke seek time	18 ms	18 ms
Track to track seek time	0.8 ms	0.8 ms
Average seek time	8.9 ms	8.9 ms
Average latency	4.17 ms	4.17 ms
Bytes per sector	512	512
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Mean time between failures (MTBF)	600000 h	600000 h
Power2 differ
Power consumption (typical)Differs	10 W	9.6 W
Power consumption (standby)Differs	1.3 W	0.45 W
Operating voltageKnown for one	Unknown — not stated by the source	5 / 12 V
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 shock	63 G	63 G
Non-operating shock	300 G	300 G
Non-operating altitudeKnown for one	12000	Unknown — not stated by the source
Weight & dimensionsidentical
WidthKnown for one	Unknown — not stated by the source	147 mm
DepthKnown for one	Unknown — not stated by the source	101.6 mm
HeightKnown for one	Unknown — not stated by the source	26.1 mm
WeightKnown for one	Unknown — not stated by the source	651 g
Other features1 differ
Power requirementsDiffers	+5V±5%;+12V±10%	+5V; +12V
Drive device, transfer rateKnown for one	Unknown — not stated by the source	133 MB/s
Drive ready time	10 s	10 s
Internal	Yes	Yes
Acoustic pressure emissionsKnown for one	Unknown — not stated by the source	2.8 dB
HDD transfer rateKnown for one	1000 Mbit/s	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.

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