Product comparison · 2 internal hard drives

Samsung Spinpoint T HD251KJ internal hard drive vs Seagate 40GB Serial ATA

15specifications compared
13differ
2identical
27known for one product only

Key differences

The Samsung Spinpoint T HD251KJ internal hard drive has 210 GB more HDD capacity than the Seagate 40GB Serial ATA (250 GB vs 40 GB). The Samsung Spinpoint T HD251KJ internal hard drive has 1,800 RPM more HDD speed than the Seagate 40GB Serial ATA (7200 RPM vs 5400 RPM). The Samsung Spinpoint T HD251KJ internal hard drive has 1" more HDD size than the Seagate 40GB Serial ATA (3.5" vs 2.5"). Interface: Serial ATA II on the Samsung Spinpoint T HD251KJ internal hard drive, Serial ATA on the Seagate 40GB Serial ATA. Operating voltage: 5 / 12 V on the Samsung Spinpoint T HD251KJ internal hard drive, 5 V on the Seagate 40GB Serial ATA.

HDD capacity
- Spinpoint T HD251KJ internal hard drive:250 GB
- 40GB Serial ATA:40 GB
HDD speed
- Spinpoint T HD251KJ internal hard drive:7200 RPM
- 40GB Serial ATA:5400 RPM
HDD size
- Spinpoint T HD251KJ internal hard drive:3.5"
- 40GB Serial ATA:2.5"
Interface
- Spinpoint T HD251KJ internal hard drive:Serial ATA II
- 40GB Serial ATA:Serial ATA
Track to track seek time
- Spinpoint T HD251KJ internal hard drive:0.8 ms
- 40GB Serial ATA:1.5 ms
Average seek time
- Spinpoint T HD251KJ internal hard drive:8.9 ms
- 40GB Serial ATA:12.5 ms
Start/stop cycles
- Spinpoint T HD251KJ internal hard drive:50000
- 40GB Serial ATA:300000
Operating voltage
- Spinpoint T HD251KJ internal hard drive:5 / 12 V
- 40GB Serial ATA:5 V

Side by side

Differences highlightedShow differences only

Comparison of HD251KJ, 40GB Serial ATA
42 specifications	A Samsung Spinpoint T HD251KJ internal hard drive Model HD251KJ View product	B Seagate 40GB Serial ATA View product
Features7 differ
HDD capacityDiffers	250 GB	40 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA II	Serial ATA
TypeKnown for one	Unknown — not stated by the source	HDD
Storage drive buffer size	8 MB	8 MB
HDD number of headsKnown for one	Unknown — not stated by the source	1
Read seek timeKnown for one	Unknown — not stated by the source	13 ms
Write seek timeKnown for one	Unknown — not stated by the source	14 ms
Full stroke seek timeKnown for one	Unknown — not stated by the source	23 ms
Track to track seek timeDiffers	0.8 ms	1.5 ms
Average seek timeDiffers	8.9 ms	12.5 ms
Average latencyKnown for one	Unknown — not stated by the source	5.6 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Start/stop cyclesDiffers	50000	300000
Power1 differ
Power consumption (standby)Known for one	Unknown — not stated by the source	0.26 W
Power consumption (PowerSave)Known for one	Unknown — not stated by the source	0.26 W
Power consumption (idle)Known for one	Unknown — not stated by the source	1.65 W
Power consumption (read)Known for one	Unknown — not stated by the source	1.4 W
Power consumption (write)Known for one	Unknown — not stated by the source	1.5 W
Operating voltageDiffers	5 / 12 V	5 V
Start-up currentKnown for one	Unknown — not stated by the source	1.3 A
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 60 °C	-30 - 85 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-40 - 95 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating vibrationKnown for one	Unknown — not stated by the source	2 G
Non-operating vibrationKnown for one	Unknown — not stated by the source	5 G
Operating altitudeKnown for one	Unknown — not stated by the source	-304.8 - 5500 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-304.8 - 12192 m
Operating shockKnown for one	Unknown — not stated by the source	300 G
Non-operating shockKnown for one	Unknown — not stated by the source	900 G
Weight & dimensions4 differ
WidthDiffers	102 mm	69.8 mm
DepthDiffers	146 mm	100.2 mm
HeightDiffers	25 mm	9.5 mm
WeightDiffers	610 g	102 g
Packaging dataidentical
Quantity per packKnown for one	Unknown — not stated by the source	1 pc(s)
Other featuresidentical
Windows operating systems supportedKnown for one	Unknown — not stated by the source	Yes
Dimensions (WxDxH)Known for one	102 x 146 x 25 mm	Unknown — not stated by the source
Product colourKnown for one	Black	Unknown — not stated by the source
InternalKnown for one	Yes	Unknown — not stated by the source
Maximum data 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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