Product comparison · 2 optical disc drives

Lenovo CD-RW/DVD-ROM Combo Drive vs NEC ND-4550 DVDRW 16X silver

Key differences

Product colour
- CD-RW/DVD-ROM Combo Drive:Black
- ND-4550 DVDRW 16X silver:Silver
Dimensions (WxDxH)
- CD-RW/DVD-ROM Combo Drive:149 x 190 x 41.5 mm
- ND-4550 DVDRW 16X silver:148 x 42 x 190 mm

Differences highlightedShow differences only

Comparison of CD-RW/DVD-ROM Combo Drive, ND-4550 DVDRW 16X silver
21 specifications	A Lenovo CD-RW/DVD-ROM Combo Drive View product	B NEC ND-4550 DVDRW 16X silver View product
Design1 differ
Internal	Yes	Yes
Product colourDiffers	Black	Silver
Performanceidentical
Optical drive typeKnown for one	Unknown — not stated by the source	DVD-RW
Drive device, buffer size	2 MB	2 MB
Writing speedidentical
CD write speed	48x	48x
CD rewrite speed	32x	32x
Reading speedidentical
CD read speed	48x	48x
DVD read speed	16x	16x
Access timeidentical
DVD drive average random access timeKnown for one	Unknown — not stated by the source	160 ms
Access time	140 ms	140 ms
Weight & dimensionsidentical
Weight	900 g	900 g
Other features1 differ
Write methodsKnown for one	Unknown — not stated by the source	CD: DOA, SAO, TAO, multisession
Dimensions (WxDxH)Differs	149 x 190 x 41.5 mm	148 x 42 x 190 mm
I/O portsKnown for one	Unknown — not stated by the source	analog- and digital output
DVD+R speedKnown for one	Unknown — not stated by the source	16x
DVD+RW speedKnown for one	Unknown — not stated by the source	8x
DVD-R speedKnown for one	Unknown — not stated by the source	16x
DVD-RW speedKnown for one	Unknown — not stated by the source	6x
Drive device, transfer rateKnown for one	7.5 MB/s	Unknown — not stated by the source
Operational conditionsidentical
Operating relative humidity (H-H)Known for one	10 - 80%	Unknown — not stated by the source
Operating temperature (T-T)Known for one	5 - 45 °C	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.