Acer 640Gb USB 2.0 vs Acer 750Gb USB 2.0

Comparison of 640Gb USB 2.0, 750Gb USB 2.0

15 specifications	A Acer 640Gb USB 2.0View product	B Acer 750Gb USB 2.0View product
Hard drive1 differ
HDD capacityDiffers	640 GB	750 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
Type	HDD	HDD
InterfaceKnown for one	—Unknown — not stated by the source	Serial ATA
Ports & interfacesidentical
Maximum data transfer rateKnown for one	480 Mbit/s	—Unknown — not stated by the source
USB connectorKnown for one	USB	—Unknown — not stated by the source
USB versionKnown for one	2.0	—Unknown — not stated by the source
USB data transfer ratesKnown for one	—Unknown — not stated by the source	480 Mbit/s
Featuresidentical
Product colour	Black	Black
Certification	CE, FCC	CE, FCC
Power1 differ
Bus poweredDiffers	USB	No
Other featuresidentical
Connectivity technologyKnown for one	Wired	—Unknown — not stated by the source
USB 2.0 ports quantityKnown for one	—Unknown — not stated by the source	1
USB requiredKnown for one	—Unknown — not stated by the source	Yes

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.