Iomega 320GB USB 2.0 vs Iomega 500GB USB 2.0

Comparison of 320GB USB 2.0, 500GB USB 2.0

21 specifications	A Iomega 320GB USB 2.0View product	B Iomega 500GB USB 2.0View product
Hard drive1 differ
HDD capacityDiffers	320 GB	500 GB
HDD size	2.5"	2.5"
Type	HDD	HDD
Storage drive buffer size	8 MB	8 MB
HDD speedKnown for one	—Unknown — not stated by the source	5400 RPM
Ports & interfacesidentical
Maximum data transfer rate	480 Mbit/s	480 Mbit/s
USB connector	USB	USB
USB version	2.0	2.0
USB data transfer rates	480 Mbit/s	480 Mbit/s
Featuresidentical
Product colour	Silver	Silver
Plug and Play	Yes	Yes
Poweridentical
Bus powered	USB	USB
External power adapter	No	No
Other features2 differ
Connectivity technology	Wired	Wired
Internal	No	No
Mac compatibility	Yes	Yes
Minimum RAMDiffers	128 MB	256 MB
Minimum processorKnown for one	300 MHz, Mac PowerPC G3, Intel Core Duo	—Unknown — not stated by the source
USB 2.0 ports quantityKnown for one	1	—Unknown — not stated by the source
USB required	Yes	Yes
Compatible operating systemsDiffers	Microsoft Windows Vista, 2000, 2000 Professional, XP Home, XP Professional, XP Professional x64 Mac OS X, 10.1.5 +	Windows 2000 Pro / XP Home / XP Pro/XP Pro x64 / Vista

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.