Product comparison · 2 optical disc drives

LG GDR-H20N, black vs NEC AD-7170A DVD-RW 18x

8specifications compared
5differ
3identical
22known for one product only

Key differences

Interface
- GDR-H20N, black:Serial ATA
- AD-7170A DVD-RW 18x:EIDE/ATA
CD read speed
- GDR-H20N, black:52x
- AD-7170A DVD-RW 18x:48x
DVD drive average random access time
- GDR-H20N, black:100 ms
- AD-7170A DVD-RW 18x:160 ms
Weight
- GDR-H20N, black:700 g
- AD-7170A DVD-RW 18x:705 g
Dimensions (WxDxH)
- GDR-H20N, black:146 x 165 x 41.3 mm
- AD-7170A DVD-RW 18x:148 x 175 x 42 mm

Side by side

Differences highlightedShow differences only

Comparison of GDR-H20N, black, AD-7170A DVD-RW 18x
30 specifications	A LG GDR-H20N, black View product	B NEC AD-7170A DVD-RW 18x View product
Designidentical
Disc loading typeKnown for one	Unknown — not stated by the source	Tray
Performance1 differ
InterfaceDiffers	Serial ATA	EIDE/ATA
Drive device, buffer sizeKnown for one	0.198 MB	Unknown — not stated by the source
Writing speedidentical
CD write speedKnown for one	Unknown — not stated by the source	48x
CD rewrite speedKnown for one	Unknown — not stated by the source	32x
DVD+R write speedKnown for one	Unknown — not stated by the source	18x
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	8x
DVD-R write speedKnown for one	Unknown — not stated by the source	18x
DVD-RAM write speedKnown for one	Unknown — not stated by the source	12x
DVD-RW write speedKnown for one	Unknown — not stated by the source	6x
Reading speed1 differ
CD read speedDiffers	52x	48x
Access time1 differ
DVD drive average random access timeDiffers	100 ms	160 ms
Access timeKnown for one	Unknown — not stated by the source	140 ms
CD-ROM drive average random access timeKnown for one	900 ms	Unknown — not stated by the source
Record modesidentical
Disc-at-once (DAO)Known for one	Unknown — not stated by the source	Yes
Fixed packetKnown 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
Variable packetKnown for one	Unknown — not stated by the source	Yes
Weight & dimensions1 differ
WeightDiffers	700 g	705 g
Other features1 differ
Media types supportedKnown for one	Unknown — not stated by the source	DVD-ROM, DVD-Video, CD-ROM, CD-ROM XA, CD-I Ready, CD-Bridge, PhotoCD, VideoCD, CD-DA, CD Extra, CD Text
Dimensions (WxDxH)Differs	146 x 165 x 41.3 mm	148 x 175 x 42 mm
Drive devices burst data transfer rate (PIO)Known for one	Unknown — not stated by the source	mode 4
Drive devices burst data transfer rate (Ultra DMA)Known for one	Unknown — not stated by the source	Ultra DMA 66
Compatible operating systemsKnown for one	Windows 95, 98, 2K, ME, NT 4.0, XP, Vista, 2003 server Linux Slackware Ver 3.10, Solaris Ver 2.4 +	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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