HP 647945-001 optical disc drive Internal vs HP 647946-001 optical disc drive Internal DVD±R/RW

Comparison of 647945-001, 647946-001

19 specifications	A HP 647945-001 optical disc drive Internal Model 647945-001 View product	B HP 647946-001 optical disc drive Internal DVD±R/RW Model 647946-001 View product
Designidentical
Internal	Yes	Yes
Performanceidentical
Optical drive typeKnown for one	—Unknown — not stated by the source	DVD±R/RW
InterfaceKnown for one	—Unknown — not stated by the source	Serial ATA
LightScribeKnown for one	—Unknown — not stated by the source	Yes
Compatible products	ProBook 4330s, ProBook 4331s, ProBook 4430s, ProBook 4431s	ProBook 4330s, ProBook 4331s, ProBook 4430s, ProBook 4431s
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	24x
DVD+R Double Layer write speedKnown for one	—Unknown — not stated by the source	6x
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	6x
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 speedidentical
CD read speed	24x	24x
DVD-ROM read speedKnown for one	—Unknown — not stated by the source	8x
DVD read speedKnown for one	8x	—Unknown — not stated by the source
Access timeidentical
DVD drive average random access time	160 ms	160 ms
CD-ROM drive average random access time	140 ms	140 ms

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.