Product comparison · 2 internal hard drives

Samsung EcoGreen HM320HJ internal hard drive vs Samsung EcoGreen HM640JJ internal hard drive

Key differences

HDD capacity
- EcoGreen HM320HJ internal hard drive:320 GB
- EcoGreen HM640JJ internal hard drive:640 GB
Weight
- EcoGreen HM320HJ internal hard drive:110 g
- EcoGreen HM640JJ internal hard drive:119 g

Differences highlightedShow differences only

Comparison of HM320HJ, HM640JJ
27 specifications	A Samsung EcoGreen HM320HJ internal hard drive Model HM320HJ View product	B Samsung EcoGreen HM640JJ internal hard drive Model HM640JJ View product
Features1 differ
HDD capacityDiffers	320 GB	640 GB
HDD speed	7200 RPM	7200 RPM
Interface	Serial ATA II	Serial ATA II
Storage drive buffer size	16 MB	16 MB
Average seek time	11 ms	11 ms
Operational conditionsidentical
Operating temperature (T-T)	5 - 55 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating vibration	1.5 G	1.5 G
Operating altitude	-300 - 3000 m	-300 - 3000 m
Non-operating altitude	-400 - 15000 m	-400 - 15000 m
Operating shock	325 G	325 G
Non-operating shock	900 G	900 G
Weight & dimensions1 differ
Width	69.8 mm	69.8 mm
Depth	100.3 mm	100.3 mm
Height	9.5 mm	9.5 mm
WeightDiffers	110 g	119 g
Other featuresidentical
Ethernet LAN	No	No
Data transfer rate	3 Gbit/s	3 Gbit/s
Drive device, transfer rate	300 MB/s	300 MB/s
Drive ready time	4 s	4 s
Fibre Channel	No	No
FireWire 400	No	No
FireWire 800	No	No
Internal	Yes	Yes
USB 2.0 ports quantity	0	0
USB 3.2 Gen 1 (3.1 Gen 1) ports quantity	0	0
USB powered	No	No

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.