NEC AD-7173 Black vs NEC AD-7173A Beige

Comparison of AD-7173 Black, AD-7173A Beige

36 specifications	A NEC AD-7173 BlackView product	B NEC AD-7173A BeigeView product
Design1 differ
Internal	Yes	Yes
Product colourDiffers	Black	Beige
Disc loading type	Tray	Tray
MountingKnown for one	Vertical/Horizontal	—Unknown — not stated by the source
Performance1 differ
Optical drive type	DVD-RW	DVD-RW
InterfaceDiffers	Serial ATA	IDE/ATA
Drive device, buffer size	2 MB	2 MB
Burst transfer rateKnown for one	150 MB/s	—Unknown — not stated by the source
Writing speedidentical
CD write speed	48x	48x
CD rewrite speed	32x	32x
CD-R write speedKnown for one	48x	—Unknown — not stated by the source
CD-RW write speedKnown for one	32x	—Unknown — not stated by the source
DVD+R write speed	18x	18x
DVD+RW write speed	8x	8x
DVD-R Double Layer write speed	8x	8x
DVD-R write speed	18x	18x
DVD-RAM write speed	12x	12x
DVD-RW write speed	6x	6x
Reading speedidentical
CD read speed	48x	48x
CD-ROM read speedKnown for one	48x	—Unknown — not stated by the source
DVD-ROM read speedKnown for one	16x	—Unknown — not stated by the source
DVD+R read speedKnown for one	—Unknown — not stated by the source	16x
Access timeidentical
DVD drive average random access time	160 ms	160 ms
CD-ROM drive average random access time	140 ms	140 ms
Record modesidentical
Disc-at-once (DAO)	Yes	Yes
Fixed packetKnown for one	Yes	—Unknown — not stated by the source
Multi session	Yes	Yes
Session-at-once (SAO)	Yes	Yes
Track-at-once (TAO)	Yes	Yes
Variable packetKnown for one	Yes	—Unknown — not stated by the source
Packet writingKnown for one	—Unknown — not stated by the source	Yes
Weight & dimensionsidentical
HeightKnown for one	42 mm	—Unknown — not stated by the source
Weight	705 g	705 g
Other featuresidentical
Dimensions (WxDxH)	148 x 175 x 42 mm	148 x 175 x 42 mm
Number of optical discsKnown for one	1 discs	—Unknown — not stated by the source
Media types supportedKnown for one	—Unknown — not stated by the source	DVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD +R, DVD +RW, DVD +R9, CD-ROM, CD-R, CD-RW

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.