Product comparison · 2 internal hard drives

Samsung HDD 1TB 2.5" SATA vs Samsung EcoGreen HM640JJ internal hard drive

25specifications compared
12differ
13identical
11known for one product only

Key differences

HDD capacity
- HDD 1TB 2.5" SATA:1 TB
- EcoGreen HM640JJ internal hard drive:640 GB
HDD speed
- HDD 1TB 2.5" SATA:5400 RPM
- EcoGreen HM640JJ internal hard drive:7200 RPM
Interface
- HDD 1TB 2.5" SATA:Serial ATA
- EcoGreen HM640JJ internal hard drive:Serial ATA II
Storage drive buffer size
- HDD 1TB 2.5" SATA:8 MB
- EcoGreen HM640JJ internal hard drive:16 MB
Average seek time
- HDD 1TB 2.5" SATA:12 ms
- EcoGreen HM640JJ internal hard drive:11 ms
Operating vibration
- HDD 1TB 2.5" SATA:1.5 Grms
- EcoGreen HM640JJ internal hard drive:1.5 G
Operating shock
- HDD 1TB 2.5" SATA:385 G
- EcoGreen HM640JJ internal hard drive:325 G
Non-operating shock
- HDD 1TB 2.5" SATA:800 G
- EcoGreen HM640JJ internal hard drive:900 G

Side by side

Differences highlightedShow differences only

Comparison of HDD 1TB 2.5" SATA, HM640JJ
36 specifications	A Samsung HDD 1TB 2.5" SATA View product	B Samsung EcoGreen HM640JJ internal hard drive Model HM640JJ View product
Features5 differ
HDD capacityDiffers	1 TB	640 GB
HDD speedDiffers	5400 RPM	7200 RPM
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
InterfaceDiffers	Serial ATA	Serial ATA II
Storage drive buffer sizeDiffers	8 MB	16 MB
Average seek timeDiffers	12 ms	11 ms
Poweridentical
Power consumption (standby)Known for one	0.2 W	Unknown — not stated by the source
Power consumption (read)Known for one	2.4 W	Unknown — not stated by the source
Power consumption (write)Known for one	2.4 W	Unknown — not stated by the source
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Operational conditions3 differ
Operating temperature (T-T)	5 - 55 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating vibrationDiffers	1.5 Grms	1.5 G
Operating altitude	-300 - 3000 m	-300 - 3000 m
Non-operating altitude	-400 - 15000 m	-400 - 15000 m
Operating shockDiffers	385 G	325 G
Non-operating shockDiffers	800 G	900 G
Weight & dimensions3 differ
Width	69.8 mm	69.8 mm
DepthDiffers	103 mm	100.3 mm
HeightDiffers	12.5 mm	9.5 mm
WeightDiffers	150 g	119 g
Other features1 differ
HDD transfer rateKnown for one	1081 Mbit/s	Unknown — not stated by the source
Ethernet LAN	No	No
Drive ready timeDiffers	5 s	4 s
Fibre Channel	No	No
FireWire 400	No	No
FireWire 800	No	No
Internal	Yes	Yes
Maximum data transfer rateKnown for one	300 Mbit/s	Unknown — not stated by the source
USB 2.0 ports quantity	0	0
USB 3.2 Gen 1 (3.1 Gen 1) ports quantity	0	0
USB powered	No	No
Data transfer rateKnown for one	Unknown — not stated by the source	3 Gbit/s
Drive device, transfer rateKnown for one	Unknown — not stated by the source	300 MB/s

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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