ADATA 500GB CH94 vs ADATA CH94 Portable 640GB

Comparison of 500GB CH94, CH94 Portable 640GB

22 specifications	A ADATA 500GB CH94View product	B ADATA CH94 Portable 640GBView product
Hard drive1 differ
HDD capacityDiffers	500 GB	640 GB
HDD size	2.5"	2.5"
Type	HDD	HDD
Ports & interfacesidentical
Maximum data transfer rate	480 Mbit/s	480 Mbit/s
USB connector	USB	USB
USB version	2.0	2.0
Features1 differ
Product colourDiffers	Blue	White
Plug and Play	Yes	Yes
Poweridentical
Bus powered	USB	USB
Weight & dimensionsidentical
Width	87.5 mm	87.5 mm
Depth	130.9 mm	130.9 mm
Height	20.3 mm	20.3 mm
Weight	172 g	172 g
Other featuresidentical
Internal	No	No
Mac compatibility	Yes	Yes
Material	Plastic	Plastic
Quick start guideKnown for one	—Unknown — not stated by the source	Yes
USB 2.0 ports quantity	1	1
USB cable	USB	USB
USB required	Yes	Yes
Compatible operating systems	Windows 2000, XP, Vista, 7 Mac OS X 10.4 Linux Kernal 2.4	Windows 2000, XP, Vista, 7 Mac OS X 10.4 Linux Kernal 2.4
Dimensions (WxDxH)	87.5 x 130.88 x 20.3 mm	87.5 x 130.88 x 20.3 mm

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.