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Product comparison · 2 optical disc drives

NEC DVD burner ND-4551 vs NEC ND-7550 DVD-RW Black Slim

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  • 20specifications compared
  • 12differ
  • 8identical
  • 23known for one product only

Key differences

  • Product colour
    • White
    • Black
  • CD write speed
    • 48x
    • 24x
  • CD rewrite speed
    • 32x
    • 20x
  • CD read speed
    • 48x
    • 24x
  • DVD read speed
    • 16x
    • 8x
  • Weight
    • 900 g
    • 190 g
  • Dimensions (WxDxH)
    • 42 x 190 x 148 mm
    • 128 x 12.7 x 129 mm
  • DVD+R speed
    • 16x
    • 8x

Side by side

Differences highlightedShow differences only
43 specifications
A

NEC

DVD burner ND-4551View product
B

NEC

ND-7550 DVD-RW Black SlimView product
Design1 differ
InternalYesYes
Product colourDiffersWhiteBlack
Disc loading typeTrayTray
Performanceidentical
Optical drive typeDVD-RWDVD-RW
Drive device, buffer sizeKnown for one2 MB
Burst transfer rateKnown for one33 MB/s
Writing speed2 differ
CD write speedDiffers48x24x
CD rewrite speedDiffers32x20x
CD-R write speedKnown for one24x
CD-RW write speedKnown for one20x
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
DVD write speedKnown for one8x
DVD rewrite speedKnown for one8x
Reading speed2 differ
CD read speedDiffers48x24x
CD-R read speedKnown for one24x
CD-RW read speedKnown for one20x
DVD+R read speedKnown for one8x
DVD-R Double Layer read speedKnown for one4x
DVD-R read speedKnown for one8x
DVD-RAM read speedKnown for one5x
DVD-RW read speedKnown for one6x
DVD+RW read speedKnown for one8x
DVD read speedDiffers16x8x
Access timeidentical
Access timeKnown for one130 ms
Weight & dimensions1 differ
WeightDiffers900 g190 g
Other features6 differ
Media types supportedDiffersDVD-ROM, DVD-R, DVD-RW, DVD+R, DVD-RW, DVD DL, DVD Video, CD-ROM, CD-ROM XA, CD-Audio, CD Extra, CD Text, CD-I Ready, CD Bridge, Photo-CD, VideoCD, HybridCD, LabelFlashDVD-ROM,DVD-R,DVD+R, DVD+RW,CD-ROM, CD-R, CD-RW
Minimum system requirementsKnown for one-MPC Level 3 -MultiRead -PC2001
Write methodsDiffersDAO, SAO, TAODAO, SAO,TAO + zero gap, variable / fixed packet, multisession
Dimensions (WxDxH)Differs42 x 190 x 148 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 speedDiffers6x4x
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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