Sawtooth Gigabit AGP G4 needs power supply

Discussion in 'PowerPC Macs' started by Gothboy1, Apr 18, 2017.

  1. Gothboy1 macrumors member

    Gothboy1

    Joined:
    Jan 9, 2015
    #1
    So besides my 2 Mac Pros I also have a 2001 Sawtooth that got a fastMac dual 1.4 processor upgrade way back when and it needs a power supply replacement. One day after not using it for a few months it just wouldn't turn on. It was plugged in during that time...and I changed the battery...but nothing when you hit the button. So if I can find an inexpensive power supply I'd replace it myself....I could use it to run older apps and rescue the files from the HDs.
    So I found a good install video
    In this video he specifies a Delta Electronics DPS-338B-B as the one to look for. My question though is: Does it have to be that Delta model # with the same specs or can I use say a DE DPS200 PB-110B? It's hard to find that exact one.
     
  2. QSDP-User, Apr 18, 2017
    Last edited: Apr 18, 2017

    QSDP-User macrumors regular

    QSDP-User

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    Jan 13, 2015
    Location:
    California, USA
    #2
    Nice YouTube video.

    I haven't searched lately, but I'd think a new PS designed for an old Sawtooth would be hard to find.

    An off-the-shelf ATX (but wisely not too cheap) can be used with an adapted 20/24-pin cable extension between the ATX & the logicboard, do-it-yourself as shown here:
    http://www.jcsenterprises.com/Japamacs_Page/Blog/EA215F16-F592-4CF7-AA8A-496D5323F6BC.html

    In other words, a standard 20/24-pin cable extension is MacGyvered to work properly with a standard ATX power supply connected to a Sawtooth's logicboard's pin circuitry.

    I've done this sucessfully. An ATX with an additional side fan gets problematic in positioning though, i.e.,
    the extra fan blows or intakes right against the case side - Apple had to do things its way so its "upside-down" PSUs were bought as replacements.

    Also, using an adapted 20/24-pin cable extension is more convenient than MacGyvering the ATX's own pin cable since further PSU replacement, if needed, is quick & easy.
     
  3. eyoungren macrumors P6

    eyoungren

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    Phoenix • 85037
    #3
    If we're going to do an ATX conversion, make it easy on yourself. Buy a cable. Someone else has already done the work.

    http://atxg4.com/order.html
     
  4. Gothboy1 thread starter macrumors member

    Gothboy1

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    Jan 9, 2015
  5. QSDP-User, Apr 18, 2017
    Last edited: Apr 18, 2017

    QSDP-User macrumors regular

    QSDP-User

    Joined:
    Jan 13, 2015
    Location:
    California, USA
    #5
    Well, the eBay item is by brand a simple solution for your Sawtooth.
    But it is used so who knows how reliable it would be.
    It may fulfill your needs, so your call on buying it.
    Its cost is comparable to a new standard ATX PS.

    You could use eyoungren's advice & buy the adapter ready-made and then buy a cheap-ish ATX for more reliabilty IMO.

    EDIT: I just realized there's a difference between Sawtooth AGP & Sawtooth Gigabit extensions adapters.

    So my guide link for a Sawtooth AGP extension adapter doesn't apply.
    I noticed the ready-made Gigabit adapter is $22.50, quite a jump from the Sawtooth AGP's $13.

    There is a guide for Gigabit on eyoungren's linked website here for anyone interested (which is more involved):
    http://atxg4.com/gige-da.html
     
  6. Gothboy1 thread starter macrumors member

    Gothboy1

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    Jan 9, 2015
  7. Gothboy1 thread starter macrumors member

    Gothboy1

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    Jan 9, 2015
  8. QSDP-User macrumors regular

    QSDP-User

    Joined:
    Jan 13, 2015
    Location:
    California, USA
    #8
    Case-size-wise, mounting screw-wise: Yes (ATX standard)
    Power-wise: Most likely
    Actual install placement: Upside-Down placement for Apple/Mac has side fan facing Sawtooth case wall (not the PCI slots) which is do-able but not how a cooling fan should face. Note: Some ATXs don't have side fans.

    H O W E V E R ---> The Still Existing Problem - No indication it's designed for a Sawtooth Gigabit:
    This power supply = ATX standard 20-pin circuitry which doesn't match Apple's proprietary logic board 20-pin circuitry design (where the power supply plugs into the logic board).
    The Solution for this or any ATX Power Supply: The modified cable extension (Gigabit version for $22.50 w/2.50 shipping) at
    http://atxg4.com/order.html

    Else buy the used Sawtooth AGP power supply for $29.99 on eBay to save money,
    which now that I think off it, I hope applies for both AGP & Gigabit.
    (Looks like 46.99 all new v. $29.99 used)
     
  9. Gothboy1 thread starter macrumors member

    Gothboy1

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