Product comparison · 2 optical disc drives

NEC AD-7170S optical disc drive Internal vs NEC AD-7540A DVD-RW 8x slim for notebooks

19specifications compared
12differ
7identical
8known for one product only

Key differences

Interface
- AD-7170S optical disc drive Internal:Serial ATA
- AD-7540A DVD-RW 8x slim for notebooks:EIDE/ATA
CD write speed
- AD-7170S optical disc drive Internal:48x
- AD-7540A DVD-RW 8x slim for notebooks:24x
CD rewrite speed
- AD-7170S optical disc drive Internal:32x
- AD-7540A DVD-RW 8x slim for notebooks:24x
DVD+R write speed
- AD-7170S optical disc drive Internal:18x
- AD-7540A DVD-RW 8x slim for notebooks:8x
DVD-R Double Layer write speed
- AD-7170S optical disc drive Internal:8x
- AD-7540A DVD-RW 8x slim for notebooks:4x
DVD-R write speed
- AD-7170S optical disc drive Internal:18x
- AD-7540A DVD-RW 8x slim for notebooks:8x
DVD-RAM write speed
- AD-7170S optical disc drive Internal:12x
- AD-7540A DVD-RW 8x slim for notebooks:5x
CD read speed
- AD-7170S optical disc drive Internal:48x
- AD-7540A DVD-RW 8x slim for notebooks:24x

Side by side

Differences highlightedShow differences only

Comparison of AD-7170S, AD-7540A DVD-RW 8x slim for notebooks
27 specifications	A NEC AD-7170S optical disc drive Internal Model AD-7170S View product	B NEC AD-7540A DVD-RW 8x slim for notebooks View product
Designidentical
Internal	Yes	Yes
Disc loading typeKnown for one	Unknown — not stated by the source	Tray
Performance1 differ
InterfaceDiffers	Serial ATA	EIDE/ATA
Writing speed6 differ
CD write speedDiffers	48x	24x
CD rewrite speedDiffers	32x	24x
DVD+R write speedDiffers	18x	8x
DVD+RW write speed	8x	8x
DVD-R Double Layer write speedDiffers	8x	4x
DVD-R write speedDiffers	18x	8x
DVD-RAM write speedDiffers	12x	5x
DVD-RW write speed	6x	6x
Reading speed2 differ
CD read speedDiffers	48x	24x
DVD read speedDiffers	16x	8x
Access time1 differ
DVD drive average random access timeDiffers	160 ms	180 ms
Access timeKnown for one	Unknown — not stated by the source	150 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 & dimensions1 differ
WeightDiffers	705 g	180 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 +R9, DVD +RW, CD-ROM, CD-R, CD-RW
Dimensions (WxDxH)Differs	148 x 42 x 175 mm	128 x 129 x 12.7 mm
Drive devices burst data transfer rate (PIO)Known for one	Unknown — not stated by the source	PIO mode 4
Drive devices burst data transfer rate (Ultra DMA)Known for one	Unknown — not stated by the source	Ultra DMA 33

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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