NEC AD-7170S Silver vs NEC AD7170S, Black

Comparison of AD-7170S Silver, AD7170S, Black

35 specifications	A NEC AD-7170S SilverView product	B NEC AD7170S, BlackView product
Design1 differ
Internal	Yes	Yes
Product colourDiffers	Silver	Black
Disc loading type	Tray	Tray
MountingKnown for one	Vertical/Horizontal	—Unknown — not stated by the source
Performanceidentical
Optical drive typeKnown for one	DVD-RW	—Unknown — not stated by the source
Interface	Serial ATA	Serial ATA
Drive device, buffer sizeKnown for one	2 MB	—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
DVD 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
Weight	705 g	705 g
Other features1 differ
Media types supportedDiffers	DVD-ROM, DVD-R (DL approx march 2005), DVD-RW, DVD+R, DVD+RW,DVD+R9,CD-ROM, CD-R & CD-RW 80mm & 120mm	DVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD +R, DVD +RW, DVD +R9, CD-ROM, CD-R, CD-RW
Write methodsKnown for one	DAO, SAO,TAO zero gap,variable / fixed packet, multisession	—Unknown — not stated by the source
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
Double Layer DVD write speedKnown for one	8x	—Unknown — not stated by the source

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.