LiteOn SOHW-1633S

Our roundup would not be complete without an offering from LiteOn. LiteOn has continuously proven itself as a solid (but generally not outstanding) OEM and retail manufacturer.

 LiteOn SHOW-1633S 16X DVD-/+RW Drive
Interface PATA
CD Write Speed 48X, 40X CAV
32X, 24X P-CAV
16X, 8X CLV
CD Rewrite Speed 24X Z-CLV
16X, 10X, 4X CLV
CD Read Speed 40X MAX CAV
DVD-R Write Speed 8X, 6X Z-CLV
4X, 2X, 1X
DVD-RW Rewrite Speed 4X, 2X, 1X CLV
DVD+R Write Speed 16X CAV
12X, 8X P-CAV
6X, 4X, 2.4X
DVD+RW Rewrite Speed 4X, 2.4X
DVD+DL Write Speed 2.4X CLV
DVD Read Speed 16X MAX CAV
Supported Modes DAO / DAO-RAW 16 & 96
TAO
SAO / RAW SAO, RAW SAO 16 & 96
Packet Write
Multi-Session
Supported Formats DVD±R/W (DAO, Incremental, muti-border, restricted overwriting)

CD-R, CD-RW, CD-ROM, CD-DA,
(variable packet, TAO, SAO, DAO, raw burning/overburn)
Access Time CD: 160ms
DVD: 160ms
Buffer 2MB

Once again, LiteOn went with a MediaTek based DSP, the MT1828E. Below, you can see a scan of the double-sided PCB. Using a PCB with components on both sides slightly increases the cost and complexity of the unit, but also decreases the size of the drive. This is why most MediaTek burners have a smaller form factor.




Click to enlarge.


On the front side of the mainboard, there is not a whole lot to see other than the Samsung 3.3V DRAM module. The reverse side of the main PCB can be seen below.



Click to enlarge.


Coupled with the analog controller, the MT1616E, the SHOW-1633S provides all the features of NEC and Pioneer, as well as additional features like error feedback. All MediaTek controllers provide feedback to the PC on the number of C1/C2/C3 (or PI/PO) errors produced during a burn. Software like K-Probe allows the PC to record and graph these errors in the same manner that Q-Tools reports errors. This is a great feature if you are a hardware reviewer, but not something that we would recommend as a factor in a purchase decision.


Although we are accustomed to high pitch whines while writing discs, the LiteOn 1633S was extremely noisy.

Feel free to download the performance graphs for the SOHW-1633S here.

MSI DR16-B Sony DRU-710A
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  • kellvarsen - Friday, November 26, 2004 - link

    I would like to congrtulate the Anandtech team for this DVD-RW roundup as they prooved once more that they are better and more thorough with the testing than Tomshardware.And by this i am reffering to the writing quality test mainly ,which in my opinion is the most important and eloquent of them all.Great HL2 review also!!! Reply
  • Tabajara - Tuesday, November 16, 2004 - link

    I've heard several people say that the new Plextor 716A drives are defective, and are mostly burning DVD coasters, specially dual layer ones. Pioneer Europe isn't selling them yet, and this also point to some kind of manufacturing problem. I was waiting for this drive, but now I don't know if I will buy a NEC or a Pioneer one. I would buy the DVR-108 if a new firmware version enables the user the choose the booktype to be used. Reply
  • JaRb0y - Thursday, November 4, 2004 - link

    Curious, did you get the NEC 3500AG to write Fujifilm 48X CDR media at 48X? It appears you did, but I heard NEC limited the speed on some types. My drive does 32X on the Fujifilm TY, am I missing something? Reply
  • DonB - Thursday, November 4, 2004 - link

    "ND-3500A is priced $10 lower than Pioneer's DVR-108D at $68" Prices are really coming down. I bought the same NEC 3500A just a few months ago for $95 + shipping (from NewEgg). Reply
  • eleewhm - Wednesday, November 3, 2004 - link

    you guys sure know how to review dvd writers???
    looks like you are good at opening up the drives only

    Since when does NEC 3500 overdrive MCC003?????? 6:72??...it only writes @8x speeds....

    pls relook at the way you guys post the results...and understand nero numbers before publishing the article...

    see how ppl are thrashing you guys here in singapore...we have a bunch of serious ppl here doing testing ...

    http://forums.hardwarezone.com/showthread.php?p=11...


    Reply
  • Maverick215 - Wednesday, November 3, 2004 - link


    >NEC follows a pattern for each firmware revision: 2.xy, where:
    >
    >X = Type (Retail, OEM, Rebadge)
    >Y = Revision number
    >
    >Till today know patterns:
    >
    >X = 0 (OEM)
    >X = 1 (Retail)
    >X = 2 (I-O Data)
    >X = 4 (Freecom)
    >X = 7 (TDK)
    >X = B (Ricoh)
    >X = F (MadDog)
    >----------------------
    >Y = 6
    >Y = 7
    >Y = 8
    So what 2.26 really represents is the same generation of firmware with feature tweaks from an oem that rebadged the drive. The firmware wasn't released for the "retail" drive. We must distinguish OEM from rebadge now. OEM in the more "traditional" is a drive intended for resale, such as in a system(this is what you'll find at newegg and similar being sold as NEC). OEM rebadge would be a drive intended to be sold by another company with that company's logo etc if they desire, the insides of all these drives could very well be exactly the same, and often times are, since this saves the OEM a great deal of money. At most you'll get different revisions of the same line. (On the flip side you'll see companies such as HP that buy 16x drives from whoever is the cheapest, so Lite-On one month and BenQ the next)
    --
    NEC does have more support than just the "official" there are several "hacked" firmwares
    that provide all kinds of features not in the official releases(bitsetting included), though I think they go beyond the scope of what you were trying to portray.
    --
    So, more fairly you would represent that the drive being OEM(system) might come with a 2.x7 firmware most likely 2.17(see above). An important distinction. Since this would seem to give this drive the same flaw as the pioneer (bitsetting only in DL) that disqualified itfrom winning..
    But, I still don't need dvd-ram :)
    Picking and chosing features from untested firmware and not doing the same from another drive has introduced a clear bias(bias in a scientific sense, which is information/data which skews the results of your study/review due to a sytematic error in your study/review design; I am NOT implying you have a bias to one product or another) in the selection of the winner.
    ==
    as an aside, further confirmation that my assumption about the nutech drives is correct
    email correspondence with Chris Geerlings,
    Field Application Engineer from nutech I inquired to using any of the firmwares from the benq ftp. And he wrote back:
    "I know the (G7)K9 works, the others I haven't tested yet."
    Reply
  • asteamerandy - Tuesday, November 2, 2004 - link

    In you review:

    "If LG had implemented bitsetting into their GSA-4160B, it would have helped their product climb the ladder ..."

    "The booktype setting feature offered in this unit also makes this a great drive. The GSA-4160B is a bit on the steep side ..."

    There are other instances if this abuigity. So which is it? Does the 4160B have the bit setting feature or not?
    Reply
  • rcabor - Tuesday, November 2, 2004 - link

    Why do you say "DVDR burn speeds are excellent, and the drive technically supports 4X DVD+DL burn speeds, even though it does not readily advertise such. You can see our original DL tests on the drive here." But then right below that you show an image of the box that Advertises 4x DVD+R dual layer? Reply
  • rcabor - Tuesday, November 2, 2004 - link

    Reply
  • Maverick215 - Tuesday, November 2, 2004 - link

    Still not working, short story=NEC 2.26=2.16 with tweaks to rebadge specifications. they do not follow traditional revision codes 2.x6=are all same Reply

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