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Product comparison · 2 optical disc drives

NEC AD-7540A DVD-RW 8x slim for notebooks vs NEC AD7170S, Black

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

Key differences

  • Interface
    • EIDE/ATA
    • Serial ATA
  • CD write speed
    • 24x
    • 48x
  • CD rewrite speed
    • 24x
    • 32x
  • DVD+R write speed
    • 8x
    • 18x
  • DVD-R Double Layer write speed
    • 4x
    • 8x
  • DVD-R write speed
    • 8x
    • 18x
  • DVD-RAM write speed
    • 5x
    • 12x
  • CD read speed
    • 24x
    • 48x

Side by side

Differences highlightedShow differences only
30 specifications
A

NEC

AD-7540A DVD-RW 8x slim for notebooksView product
B

NEC

AD7170S, BlackView product
Designidentical
InternalYesYes
Disc loading typeTrayTray
Product colourKnown for oneBlack
Performance1 differ
InterfaceDiffersEIDE/ATASerial ATA
Writing speed6 differ
CD write speedDiffers24x48x
CD rewrite speedDiffers24x32x
DVD+R write speedDiffers8x18x
DVD+RW write speed8x8x
DVD-R Double Layer write speedDiffers4x8x
DVD-R write speedDiffers8x18x
DVD-RAM write speedDiffers5x12x
DVD-RW write speed6x6x
Reading speed1 differ
CD read speedDiffers24x48x
DVD read speedKnown for one8x
DVD+R read speedKnown for one16x
Access time1 differ
DVD drive average random access timeDiffers180 ms160 ms
Access timeKnown for one150 ms
CD-ROM drive average random access timeKnown for one140 ms
Record modesidentical
Disc-at-once (DAO)YesYes
Fixed packetKnown for oneYes
Multi sessionYesYes
Session-at-once (SAO)YesYes
Track-at-once (TAO)YesYes
Variable packetKnown for oneYes
Packet writingKnown for oneYes
Weight & dimensions1 differ
WeightDiffers180 g705 g
Other features2 differ
Media types supportedDiffersDVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD +R, DVD +R9, DVD +RW, CD-ROM, CD-R, CD-RWDVD-ROM, DVD-R (DL), DVD-RW, DVD-RAM, DVD +R, DVD +RW, DVD +R9, CD-ROM, CD-R, CD-RW
Dimensions (WxDxH)Differs128 x 129 x 12.7 mm148 x 175 x 42 mm
Drive devices burst data transfer rate (PIO)Known for onePIO mode 4
Drive devices burst data transfer rate (Ultra DMA)Known for oneUltra 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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