NEC AD-7170S optical disc drive Internal vs NEC AD-7170S DVD-RW 18x SATA

Comparison of AD-7170S, AD-7170S DVD-RW 18x SATA

26 specifications	A NEC AD-7170S optical disc drive Internal Model AD-7170S View product	B NEC AD-7170S DVD-RW 18x SATAView product
Designidentical
Internal	Yes	Yes
Product colourKnown for one	—Unknown — not stated by the source	Beige
Disc loading typeKnown for one	—Unknown — not stated by the source	Tray
Performanceidentical
Interface	Serial ATA	Serial ATA
Writing speedidentical
CD write speed	48x	48x
CD rewrite speed	32x	32x
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 speed	16x	16x
Access timeidentical
DVD drive average random access time	160 ms	160 ms
Access timeKnown for one	—Unknown — not stated by the source	140 ms
CD-ROM drive average random access timeKnown for one	140 ms	—Unknown — not stated by the source
Record modesidentical
Disc-at-once (DAO)	Yes	Yes
Fixed packetKnown for one	—Unknown — not stated by the source	Yes
Multi session	Yes	Yes
Session-at-once (SAO)	Yes	Yes
Track-at-once (TAO)	Yes	Yes
Variable packetKnown for one	—Unknown — not stated by the source	Yes
Weight & dimensionsidentical
Weight	705 g	705 g
Other features1 differ
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 and CD-RW with 80mm and 120mm diameter
Dimensions (WxDxH)Differs	148 x 42 x 175 mm	148 x 175 x 42 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.