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Product comparison · 2 optical disc drives

NEC AD-7540A DVD-RW 8x slim for notebooks vs NEC NR-9500B Beige

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  • 15specifications compared
  • 6differ
  • 9identical
  • 16known for one product only

Key differences

  • CD write speed
    • 24x
    • 52x
  • CD rewrite speed
    • 24x
    • 32x
  • CD read speed
    • 24x
    • 52x
  • Weight
    • 180 g
    • 750 g
  • Dimensions (WxDxH)
    • 128 x 129 x 12.7 mm
    • 148.2 x 184 x 42 mm

Side by side

Differences highlightedShow differences only
31 specifications
A

NEC

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

NEC

NR-9500B BeigeView product
Designidentical
Product colourKnown for oneBeige
Performanceidentical
Drive device, buffer sizeKnown for one2 MB
Plug and PlayKnown for oneYes
Writing speed2 differ
CD write speedDiffers24x52x
CD rewrite speedDiffers24x32x
DVD+R write speedKnown for one8x
DVD+RW write speedKnown for one8x
DVD-R Double Layer write speedKnown for one4x
DVD-R write speedKnown for one8x
DVD-RAM write speedKnown for one5x
DVD-RW write speedKnown for one6x
Reading speed1 differ
CD read speedDiffers24x52x
DVD read speedKnown for one8x
Access timeidentical
DVD drive average random access timeKnown for one180 ms
Access timeKnown for one150 ms
CD-ROM drive average random access timeKnown for one110 ms
Record modesidentical
Packet writingKnown for oneYes
Weight & dimensions1 differ
WeightDiffers180 g750 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-RWCD-ROM, CD-R, CD-RW
Dimensions (WxDxH)Differs128 x 129 x 12.7 mm148.2 x 184 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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