Lenovo 40Y8637 optical disc drive vs Lenovo 57Y6487 optical disc drive

Comparison of 40Y8637, 57Y6487

9 specifications	A Lenovo 40Y8637 optical disc drive Model 40Y8637 View product	B Lenovo 57Y6487 optical disc drive Model 57Y6487 View product
Designidentical
Internal	No	No
Performanceidentical
Drive device, buffer size	2 MB	2 MB
Writing speed1 differ
CD write speed	24x	24x
CD rewrite speedDiffers	24x	4x
Reading speedidentical
CD read speed	24x	24x
DVD-ROM read speed	8x	8x
Access timeidentical
Access timeKnown for one	—Unknown — not stated by the source	140 ms
Weight & dimensionsidentical
WeightKnown for one	—Unknown — not stated by the source	320 g
Other featuresidentical
Dimensions (WxDxH)Known for one	—Unknown — not stated by the source	134 x 140 x 18 mm

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.