Acer 500Gb USB 2.0 vs Acer 640Gb USB 2.0

Comparison of 500Gb USB 2.0, 640Gb USB 2.0

15 specifications	A Acer 500Gb USB 2.0View product	B Acer 640Gb USB 2.0View product
Hard drive1 differ
HDD capacityDiffers	500 GB	640 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
InterfaceKnown for one	Serial ATA	—Unknown — not stated by the source
Type	HDD	HDD
Ports & interfacesidentical
USB data transfer ratesKnown for one	480 Mbit/s	—Unknown — not stated by the source
Maximum data transfer rateKnown for one	—Unknown — not stated by the source	480 Mbit/s
USB connectorKnown for one	—Unknown — not stated by the source	USB
USB versionKnown for one	—Unknown — not stated by the source	2.0
Featuresidentical
Product colour	Black	Black
Certification	CE, FCC	CE, FCC
Power1 differ
Bus poweredDiffers	No	USB
Other featuresidentical
USB 2.0 ports quantityKnown for one	1	—Unknown — not stated by the source
USB requiredKnown for one	Yes	—Unknown — not stated by the source
Connectivity technologyKnown for one	—Unknown — not stated by the source	Wired

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.