Product comparison · 2 internal hard drives

Samsung Spinpoint M HM400JI internal hard drive vs Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ

22specifications compared
13differ
9identical
19known for one product only

Key differences

The Samsung Spinpoint M HM400JI internal hard drive has 150 GB more HDD capacity than the Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ (400 GB vs 250 GB). The Samsung Spinpoint M HM400JI internal hard drive has 0.04 ms more average latency than the Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ (5.6 ms vs 5.56 ms). The Samsung Spinpoint M HM400JI internal hard drive has 0.96 W more power consumption (typical) than the Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ (2.5 W vs 1.54 W). Operating temperature (T-T): 5 - 55 °C on the Samsung Spinpoint M HM400JI internal hard drive, 0 - 60 °C on the Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ. Operating relative humidity (H-H): 8 - 90% on the Samsung Spinpoint M HM400JI internal hard drive, 5 - 95% on the Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ.

HDD capacity
- Spinpoint M HM400JI internal hard drive:400 GB
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:250 GB
Average latency
- Spinpoint M HM400JI internal hard drive:5.6 ms
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:5.56 ms
Power consumption (typical)
- Spinpoint M HM400JI internal hard drive:2.5 W
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:1.54 W
Power consumption (standby)
- Spinpoint M HM400JI internal hard drive:0.25 W
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:0.22 W
Operating temperature (T-T)
- Spinpoint M HM400JI internal hard drive:5 - 55 °C
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:0 - 60 °C
Operating relative humidity (H-H)
- Spinpoint M HM400JI internal hard drive:8 - 90%
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:5 - 95%
Operating vibration
- Spinpoint M HM400JI internal hard drive:1.5 Grms
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:1.0 Gs
Operating altitude
- Spinpoint M HM400JI internal hard drive:-300 - 3000 m
- Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ:-304.8 - 3048 m

Side by side

Differences highlightedShow differences only

Comparison of HM400JI, Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ
41 specifications	A Samsung Spinpoint M HM400JI internal hard drive Model HM400JI View product	B Seagate Momentus 5400RPM 250GB 8M SATA 3Gb/s NCQ View product
Features2 differ
HDD capacityDiffers	400 GB	250 GB
HDD speed	5400 RPM	5400 RPM
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
Interface	Serial ATA II	Serial ATA II
Storage drive buffer size	8 MB	8 MB
Average seek timeKnown for one	12 ms	Unknown — not stated by the source
Average latencyDiffers	5.6 ms	5.56 ms
Bytes per sector	512	512
Component forKnown for one	Unknown — not stated by the source	Laptop
HDD number of headsKnown for one	Unknown — not stated by the source	2
Read seek timeKnown for one	Unknown — not stated by the source	14 ms
Track to track seek timeKnown for one	Unknown — not stated by the source	1 ms
Power2 differ
Power consumption (typical)Differs	2.5 W	1.54 W
Power consumption (standby)Differs	0.25 W	0.22 W
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Start-up currentKnown for one	1 A	Unknown — not stated by the source
Operational conditions7 differ
Operating temperature (T-T)Differs	5 - 55 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Differs	8 - 90%	5 - 95%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating vibrationDiffers	1.5 Grms	1.0 Gs
Operating altitudeDiffers	-300 - 3000 m	-304.8 - 3048 m
Non-operating altitudeDiffers	-400 - 15000 m	-304.8 - 12192 m
Operating shockDiffers	400 G	350 G
Non-operating shockDiffers	900 G	800 G
Non-operating vibrationKnown for one	Unknown — not stated by the source	5 Gs
Packaging contentidentical
User guideKnown for one	Yes	Unknown — not stated by the source
Weight & dimensions2 differ
Width	69.8 mm	69.8 mm
DepthDiffers	100 mm	100.3 mm
Height	9.5 mm	9.5 mm
WeightDiffers	105 g	93.5 g
Other featuresidentical
Power requirementsKnown for one	+5V±5%	Unknown — not stated by the source
Product colourKnown for one	Black	Unknown — not stated by the source
Compatible operating systemsKnown for one	Windows 98/2000/XP	Unknown — not stated by the source
Drive ready timeKnown for one	4 s	Unknown — not stated by the source
Internal	Yes	Yes
Supported data transfer ratesKnown for one	138, 300MB/s	Unknown — not stated by the source
Acoustic pressure emissionsKnown for one	2.6 dB	Unknown — not stated by the source
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	69.85 x 100.33 x 9.5 mm
Recording densityKnown for one	Unknown — not stated by the source	1490 kbit/inch
Track densityKnown for one	Unknown — not stated by the source	265

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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