Product comparison · 2 optical disc drives

LG GDR-H20NBB optical disc drive Internal Ivory vs NEC AD-7633 black

10specifications compared
9differ
1identical
17known for one product only

Key differences

Product colour
- GDR-H20NBB optical disc drive Internal Ivory:Ivory
- AD-7633 black:Black
Interface
- GDR-H20NBB optical disc drive Internal Ivory:Serial ATA
- AD-7633 black:EIDE/ATA
Drive device, buffer size
- GDR-H20NBB optical disc drive Internal Ivory:0.198 MB
- AD-7633 black:2 MB
CD read speed
- GDR-H20NBB optical disc drive Internal Ivory:52x
- AD-7633 black:24x
DVD read speed
- GDR-H20NBB optical disc drive Internal Ivory:16x
- AD-7633 black:8x
DVD drive average random access time
- GDR-H20NBB optical disc drive Internal Ivory:160 ms
- AD-7633 black:190 ms
CD-ROM drive average random access time
- GDR-H20NBB optical disc drive Internal Ivory:140 ms
- AD-7633 black:190 ms
Weight
- GDR-H20NBB optical disc drive Internal Ivory:700 g
- AD-7633 black:160 g

Side by side

Differences highlightedShow differences only

Comparison of GDR-H20NBB, AD-7633 black
27 specifications	A LG GDR-H20NBB optical disc drive Internal Ivory Model GDR-H20NBB View product	B NEC AD-7633 black View product
Design1 differ
Internal	Yes	Yes
Product colourDiffers	Ivory	Black
Performance2 differ
InterfaceDiffers	Serial ATA	EIDE/ATA
Drive device, buffer sizeDiffers	0.198 MB	2 MB
Writing speedidentical
CD write speedKnown for one	Unknown — not stated by the source	24x
CD rewrite speedKnown for one	Unknown — not stated by the source	16x
DVD+R Double Layer write speedKnown for one	Unknown — not stated by the source	4x
DVD+R write speedKnown for one	Unknown — not stated by the source	8x
DVD+RW write speedKnown for one	Unknown — not stated by the source	8x
DVD-R Double Layer write speedKnown for one	Unknown — not stated by the source	4x
DVD-R write speedKnown for one	Unknown — not stated by the source	8x
DVD-RAM write speedKnown for one	Unknown — not stated by the source	5x
DVD-RW write speedKnown for one	Unknown — not stated by the source	6x
Reading speed2 differ
CD read speedDiffers	52x	24x
DVD read speedDiffers	16x	8x
Access time2 differ
DVD drive average random access timeDiffers	160 ms	190 ms
CD-ROM drive average random access timeDiffers	140 ms	190 ms
Record modesidentical
Disc-at-once (DAO)Known for one	Unknown — not stated by the source	Yes
Multi sessionKnown for one	Unknown — not stated by the source	Yes
Session-at-once (SAO)Known for one	Unknown — not stated by the source	Yes
Track-at-once (TAO)Known for one	Unknown — not stated by the source	Yes
Weight & dimensions1 differ
WeightDiffers	700 g	160 g
Other features1 differ
Dimensions (WxDxH)Differs	146 x 165 x 41.3 mm	12.7 x 128 x 129 mm
Compatible operating systemsKnown for one	Windows 95, 98, 2K, ME, NT 4.0 +, XP, Vista, 2003 server, Linux Slackware 3.10, Solaris 2.4 +	Unknown — not stated by the source
Drive device, transfer rateKnown for one	22.1 MB/s	Unknown — not stated by the source
Mac compatibilityKnown for one	No	Unknown — not stated by the source
Number of optical discsKnown for one	1 discs	Unknown — not stated by the source

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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