Product comparison · 2 optical disc drives

ASUS ZenDrive U9M vs iStorage QS Slim

24specifications compared
12differ
12identical
40known for one product only

Key differences

The iStorage QS Slim has 4.5 mm more width than the ASUS ZenDrive U9M (140 mm vs 135.5 mm). The ASUS ZenDrive U9M has 2.5 mm more depth than the iStorage QS Slim (142.5 mm vs 140 mm). The iStorage QS Slim has 5.1 mm more height than the ASUS ZenDrive U9M (19 mm vs 13.9 mm). Product colour: Black on the ASUS ZenDrive U9M, Grey on the iStorage QS Slim. Disc loading type: Tray on the ASUS ZenDrive U9M, Front on the iStorage QS Slim.

Product colour
- ZenDrive U9M:Black
- QS Slim:Grey
Disc loading type
- ZenDrive U9M:Tray
- QS Slim:Front
Purpose
- ZenDrive U9M:Laptop
- QS Slim:Desktop/Laptop
Interface
- ZenDrive U9M:USB 2.0
- QS Slim:USB 3.2 Gen 1 (3.1 Gen 1)
Width
- ZenDrive U9M:135.5 mm
- QS Slim:140 mm
Depth
- ZenDrive U9M:142.5 mm
- QS Slim:140 mm
Height
- ZenDrive U9M:13.9 mm
- QS Slim:19 mm
Weight
- ZenDrive U9M:245 g
- QS Slim:454 g

Side by side

Differences highlightedShow differences only

Comparison of ZenDrive U9M, QS Slim
64 specifications	A ASUS ZenDrive U9M View product	B iStorage QS Slim View product
Design2 differ
Internal	No	No
Product colourDiffers	Black	Grey
Disc loading typeDiffers	Tray	Front
Mounting	Horizontal	Horizontal
Performance3 differ
PurposeDiffers	Laptop	Desktop/Laptop
Optical drive type	DVD±RW	DVD±RW
Disc types supportedDiffers	CD-R, CD-ROM, CD-RW, DVD+R, DVD+R DL, DVD+RW, DVD-R, DVD-R DL, DVD-ROM, DVD-RW	CD, DVD
InterfaceDiffers	USB 2.0	USB 3.2 Gen 1 (3.1 Gen 1)
Optical disc diameterKnown for one	80,120 mm	Unknown — not stated by the source
Drive device, buffer sizeKnown for one	Unknown — not stated by the source	1 MB
Plug and PlayKnown for one	Unknown — not stated by the source	Yes
Secure firmwareKnown for one	Unknown — not stated by the source	Yes
Writing speedidentical
CD-R write speed	24x	24x
CD-RW write speed	24x	24x
DVD+R Double Layer write speedKnown for one	6x	Unknown — not stated by the source
DVD+R M-DISC write speedKnown for one	4x	Unknown — not stated by the source
DVD+R write speed	8x	8x
DVD+RW write speed	8x	8x
DVD-R Double Layer write speedKnown for one	6x	Unknown — not stated by the source
DVD-R write speed	8x	8x
DVD-RW write speed	6x	6x
CD write speedKnown for one	Unknown — not stated by the source	24x
Reading speedidentical
CD-R read speedKnown for one	24x	Unknown — not stated by the source
CD-ROM read speedKnown for one	24x	Unknown — not stated by the source
CD-RW read speedKnown for one	24x	Unknown — not stated by the source
DVD+R read speedKnown for one	8x	Unknown — not stated by the source
DVD-R Double Layer read speedKnown for one	8x	Unknown — not stated by the source
DVD-R read speed	8x	8x
DVD-RW read speedKnown for one	8x	Unknown — not stated by the source
DVD-Video read speedKnown for one	4x	Unknown — not stated by the source
DVD+R M-DISC read speedKnown for one	8x	Unknown — not stated by the source
DVD-ROM Double Layer read speedKnown for one	8x	Unknown — not stated by the source
Video CD read speedKnown for one	10x	Unknown — not stated by the source
Audio CD read speedKnown for one	10x	Unknown — not stated by the source
DVD+R Double Layer read speedKnown for one	8x	Unknown — not stated by the source
DVD+RW read speedKnown for one	8x	Unknown — not stated by the source
CD read speedKnown for one	Unknown — not stated by the source	24x
Access timeidentical
DVD drive average random access time	160 ms	160 ms
CD-ROM drive average random access time	140 ms	140 ms
Record modesidentical
Disc-at-once (DAO)Known for one	Yes	Unknown — not stated by the source
Incremental recordingKnown for one	Yes	Unknown — not stated by the source
Multi sessionKnown for one	Yes	Unknown — not stated by the source
Over-burn writingKnown for one	Yes	Unknown — not stated by the source
Packet writingKnown for one	Yes	Unknown — not stated by the source
Random writeKnown for one	Yes	Unknown — not stated by the source
Restricted overwriteKnown for one	Yes	Unknown — not stated by the source
Sequential writingKnown for one	Yes	Unknown — not stated by the source
Session-at-once (SAO)Known for one	Yes	Unknown — not stated by the source
Track-at-once (TAO)Known for one	Yes	Unknown — not stated by the source
System requirements2 differ
Mac operating systems supportedDiffers	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks	Yes
Windows operating systems supportedDiffers	Windows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home	Yes
Operational conditionsidentical
Operating relative humidity (H-H)Known for one	15 - 80%	Unknown — not stated by the source
Operating temperature (T-T)Known for one	5 - 40 °C	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	10 - 90%	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-30 - 60 °C	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	135.5 mm	140 mm
DepthDiffers	142.5 mm	140 mm
HeightDiffers	13.9 mm	19 mm
WeightDiffers	245 g	454 g
Packaging content1 differ
Quantity per packKnown for one	1 pc(s)	Unknown — not stated by the source
Bundled softwareKnown for one	CyberLink Power2Go 8, CyberLink PowerBackup 2.5, Nero BackItUp, E-Green	Unknown — not stated by the source
Cables includedDiffers	USB Type-A, USB Type-C	USB
ManualKnown for one	Unknown — not stated by the source	Yes
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717030	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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