Product comparison · 2 optical disc drives

NEC AD-7191A optical disc drive Internal Silver vs NEC AD-7633 black

20specifications compared
12differ
8identical
10known for one product only

Key differences

Product colour
- AD-7191A optical disc drive Internal Silver:Silver
- AD-7633 black:Black
CD write speed
- AD-7191A optical disc drive Internal Silver:48x
- AD-7633 black:24x
CD rewrite speed
- AD-7191A optical disc drive Internal Silver:32x
- AD-7633 black:16x
DVD+R write speed
- AD-7191A optical disc drive Internal Silver:20x
- AD-7633 black:8x
DVD-R Double Layer write speed
- AD-7191A optical disc drive Internal Silver:8x
- AD-7633 black:4x
DVD-R write speed
- AD-7191A optical disc drive Internal Silver:20x
- AD-7633 black:8x
DVD-RAM write speed
- AD-7191A optical disc drive Internal Silver:12x
- AD-7633 black:5x
CD read speed
- AD-7191A optical disc drive Internal Silver:48x
- AD-7633 black:24x

Side by side

Differences highlightedShow differences only

Comparison of AD-7191A, AD-7633 black
30 specifications	A NEC AD-7191A optical disc drive Internal Silver Model AD-7191A View product	B NEC AD-7633 black View product
Design1 differ
Internal	Yes	Yes
Product colourDiffers	Silver	Black
Disc loading typeKnown for one	Tray	Unknown — not stated by the source
Performanceidentical
Interface	EIDE/ATA	EIDE/ATA
Drive device, buffer sizeKnown for one	Unknown — not stated by the source	2 MB
Writing speed6 differ
CD write speedDiffers	48x	24x
CD rewrite speedDiffers	32x	16x
DVD+R write speedDiffers	20x	8x
DVD+RW write speed	8x	8x
DVD-R Double Layer write speedDiffers	8x	4x
DVD-R write speedDiffers	20x	8x
DVD-RAM write speedDiffers	12x	5x
DVD-RW write speed	6x	6x
DVD+R Double Layer write speedKnown for one	Unknown — not stated by the source	4x
Reading speed1 differ
CD read speedDiffers	48x	24x
DVD+R read speedKnown for one	16x	Unknown — not stated by the source
DVD read speedKnown for one	Unknown — not stated by the source	8x
Access time2 differ
DVD drive average random access timeDiffers	160 ms	190 ms
CD-ROM drive average random access timeDiffers	140 ms	190 ms
Record modesidentical
Disc-at-once (DAO)	Yes	Yes
Fixed packetKnown for one	Yes	Unknown — not stated by the source
Multi session	Yes	Yes
Packet writingKnown for one	Yes	Unknown — not stated by the source
Session-at-once (SAO)	Yes	Yes
Track-at-once (TAO)	Yes	Yes
Variable packetKnown for one	Yes	Unknown — not stated by the source
Weight & dimensions1 differ
HeightKnown for one	42 mm	Unknown — not stated by the source
WeightDiffers	600 g	160 g
Other features1 differ
Media types supportedKnown for one	DVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD +R, DVD +RW, DVD +R9, CD-ROM, CD-R, CD-RW	Unknown — not stated by the source
Dimensions (WxDxH)Differs	148 x 170 x 42 mm	12.7 x 128 x 129 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.

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