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Product comparison · 2 optical disc drives

NEC ND-4571 DVD RW Black vs NEC ND-7551DVD RW Black Slim

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  • 39specifications compared
  • 22differ
  • 17identical
  • 3known for one product only

Key differences

  • CD write speed
    • 48x
    • 24x
  • CD rewrite speed
    • 32x
    • 20x
  • CD-R write speed
    • 48x
    • 24x
  • CD-RW write speed
    • 32x
    • 20x
  • DVD+R write speed
    • 16x
    • 8x
  • DVD-R write speed
    • 16x
    • 8x
  • DVD-RW write speed
    • 8x
    • 6x
  • DVD write speed
    • 16x
    • 8x

Side by side

Differences highlightedShow differences only
42 specifications
A

NEC

ND-4571 DVD RW BlackView product
B

NEC

ND-7551DVD RW Black SlimView product
Designidentical
InternalYesYes
Product colourBlackBlack
Disc loading typeTrayTray
Performanceidentical
Optical drive typeDVD-RWDVD-RW
Drive device, buffer sizeKnown for one2 MB
Writing speed8 differ
CD write speedDiffers48x24x
CD rewrite speedDiffers32x20x
CD-R write speedDiffers48x24x
CD-RW write speedDiffers32x20x
DVD+R write speedDiffers16x8x
DVD+RW write speed8x8x
DVD-R Double Layer write speedKnown for one4x
DVD-R write speedDiffers16x8x
DVD-RAM write speed5x5x
DVD-RW write speedDiffers8x6x
DVD write speedDiffers16x8x
DVD rewrite speed8x8x
Reading speed8 differ
CD read speedDiffers48x24x
CD-R read speedDiffers48x24x
CD-RW read speedDiffers32x20x
DVD+R read speedDiffers16x8x
DVD-R Double Layer read speedDiffers8x4x
DVD-R read speedDiffers16x8x
DVD-RAM read speed5x5x
DVD-RW read speedDiffers8x6x
DVD+RW read speed8x8x
DVD read speedDiffers16x8x
Access time1 differ
Access timeDiffers140 ms130 ms
Weight & dimensions1 differ
WeightDiffers900 g190 g
Other features4 differ
Media types supportedDVD-ROM,DVD-R,DVD+R, DVD+RW,CD-ROM, CD-R, CD-RWDVD-ROM,DVD-R,DVD+R, DVD+RW,CD-ROM, CD-R, CD-RW
Minimum system requirements-MPC Level 3 -MultiRead -PC2001-MPC Level 3 -MultiRead -PC2001
Write methodsDAO, SAO,TAO + zero gap, variable / fixed packet, multisessionDAO, SAO,TAO + zero gap, variable / fixed packet, multisession
Dimensions (WxDxH)Differs148 x 42 x 190 mm128 x 12.7 x 129 mm
Number of optical discs1 discs1 discs
DVD+R speedDiffers16x8x
DVD+RW speed8x8x
DVD-R speedDiffers16x8x
DVD-RW speed6x6x
Double Layer DVD write speedDiffers8x4x
Drive devices burst data transfer rate (PIO)Mode 4Mode 4
Drive devices burst data transfer rate (Ultra DMA)3333
Technical featuresKnown for one-12 cm / 8 cm CD & DVD -buffer underrun prevention

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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