Product comparison · 2 internal hard drives

Samsung 320GB Serial ATA II vs Samsung Spinpoint M HM400JI internal hard drive

21specifications compared
14differ
7identical
16known for one product only

Key differences

HDD capacity
- 320GB Serial ATA II:320 GB
- Spinpoint M HM400JI internal hard drive:400 GB
HDD speed
- 320GB Serial ATA II:7200 RPM
- Spinpoint M HM400JI internal hard drive:5400 RPM
HDD size
- 320GB Serial ATA II:3.5"
- Spinpoint M HM400JI internal hard drive:2.5"
Storage drive buffer size
- 320GB Serial ATA II:16 MB
- Spinpoint M HM400JI internal hard drive:8 MB
Average seek time
- 320GB Serial ATA II:8.9 ms
- Spinpoint M HM400JI internal hard drive:12 ms
Average latency
- 320GB Serial ATA II:4.17 ms
- Spinpoint M HM400JI internal hard drive:5.6 ms
Power consumption (standby)
- 320GB Serial ATA II:1.2 W
- Spinpoint M HM400JI internal hard drive:0.25 W
Operating voltage
- 320GB Serial ATA II:5 / 12 V
- Spinpoint M HM400JI internal hard drive:5 V

Side by side

Differences highlightedShow differences only

Comparison of 320GB Serial ATA II, HM400JI
37 specifications	A Samsung 320GB Serial ATA II View product	B Samsung Spinpoint M HM400JI internal hard drive Model HM400JI View product
Features6 differ
HDD capacityDiffers	320 GB	400 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
Interface	Serial ATA II	Serial ATA II
Storage drive buffer sizeDiffers	16 MB	8 MB
Average seek timeDiffers	8.9 ms	12 ms
Average latencyDiffers	4.17 ms	5.6 ms
Bytes per sector	512	512
Full stroke seek timeKnown for one	18 ms	Unknown — not stated by the source
Track to track seek timeKnown for one	0.8 ms	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	600000 h	Unknown — not stated by the source
Power2 differ
Power consumption (typical)Known for one	Unknown — not stated by the source	2.5 W
Power consumption (standby)Differs	1.2 W	0.25 W
Operating voltageDiffers	5 / 12 V	5 V
Start-up currentKnown for one	Unknown — not stated by the source	1 A
Operational conditions4 differ
Operating temperature (T-T)Differs	0 - 60 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Differs	5 - 90%	8 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating vibrationKnown for one	Unknown — not stated by the source	1.5 Grms
Operating altitudeKnown for one	Unknown — not stated by the source	-300 - 3000 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-400 - 15000 m
Operating shockDiffers	63 G	400 G
Non-operating shockDiffers	300 G	900 G
Packaging contentidentical
User guideKnown for one	Unknown — not stated by the source	Yes
Weight & dimensionsidentical
WidthKnown for one	Unknown — not stated by the source	69.8 mm
DepthKnown for one	Unknown — not stated by the source	100 mm
HeightKnown for one	Unknown — not stated by the source	9.5 mm
WeightKnown for one	Unknown — not stated by the source	105 g
Other features2 differ
Power requirements	+5V±5%	+5V±5%
Product colour	Black	Black
Compatible operating systemsKnown for one	Unknown — not stated by the source	Windows 98/2000/XP
Drive ready timeDiffers	10 s	4 s
Internal	Yes	Yes
Supported data transfer ratesKnown for one	Unknown — not stated by the source	138, 300MB/s
Acoustic pressure emissionsDiffers	2.4 dB	2.6 dB
HDD transfer rateKnown for one	300 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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