Author Topic: Knowing which MDD Macs to avoid  (Read 275 times)

Offline bsharvy

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Knowing which MDD Macs to avoid
« on: June 14, 2019, 07:01:37 AM »
I'm in the market for an MDD Mac. Are there any tips to avoiding PSU and noise problems. I'm looking at this Wikipedia article, which suggests you can use serial numbers as a guide, but provide no more info. I heard the 1.42 GHZ models were later and quieter.

A limited range of serial numbers of this model was noted for a noisy fan, earning them the unofficial designation "Windtunnel G4" in some communities. Noise complaints became such a problem that Apple later replaced the machine's power supply (PSU) and primary cooling fan with quieter versions, and initiated a voluntary do-it-yourself (DIY) replacement scheme for all previously sold machines. A very common issue in the MDD models was a failing PSU.

Offline FdB

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Re: Knowing which MDD Macs to avoid
« Reply #1 on: June 14, 2019, 07:34:02 AM »
At this point in time, after so many years from actual manufacture dates… difficult to find any that might not eventually have eventual PSU problems. Unless previous owner’s have had their PSU serviced or replaced. (AcBel PSUs are easiest to resurrect / service. Samsung PSUs - not so easy.)

Andy Cuffe (Austin Texas) still works on these PSUs and resurrects them, reasonably… and did offer slight discounts for MacOS9Lives members.

As for noisy fans… many of the original “Windtunnel” fans were - or have been replaced. Still, many replace even those replacements… for even quieter operation.

Many swear by the 1.25 GHz MDDs. Both dual and single processors. The 1.42 GHz models featured Firewire 800 and there is software available to run OS 9.2.2 on them here. I’ve several of these machines but still prefer the “lesser” 1.25 GHz models. Suppose that it really depends upon what your primary intended end-use actually is because the 1.25 models seem to run OS 9.2.2 easier, or with fewer “hiccups”.

Little hints:

If the machine your interested in buying will repeatedly boot without having to unplug and re-plug the power, in between boots AND doesn’t fail to retain the actual time between boots (must have good battery) its’ PSU is passable. If not, this is the first tell-tale sign of possible PSU problems.

Boot with the door open and check all (visible) fan(s) operation. AND with the door closed to listen for fan noise levels. AND let it run a bit to see if it gets any noisier.

There’s just a few hints. Provide a bit more info on your end-use, and your geographic location… and I’m sure more will chime in here to help you out.  ;)
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Offline DieHard

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Re: Knowing which MDD Macs to avoid
« Reply #2 on: June 14, 2019, 11:52:44 AM »
Quote
Many swear by the 1.25 GHz MDDs. Both dual and single processors. The 1.42 GHz models featured Firewire 800 and there is software available to run OS 9.2.2 on them here. I’ve several of these machines but still prefer the “lesser” 1.25 GHz models. Suppose that it really depends upon what your primary intended end-use actually is because the 1.25 models seem to run OS 9.2.2 easier, or with fewer “hiccups”.

As documented here, if it is an OS9 unit only, and you prefer speed and less heat, you can make a custom MDD... take a 1.25 Single and replace it with a "Xserve" CPU...
you will then have a unit that myself (and Mactron) has the famous...

FW 2003 1.33 Ghz OS MDD !

Or Overclock the Xserve CPU
http://macos9lives.com/smforum/index.php/topic,1726.msg8203.html#msg8203

Offline FdB

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Re: Knowing which MDD Macs to avoid
« Reply #3 on: June 14, 2019, 12:20:25 PM »
...you can make a custom MDD... take a 1.25 Single and replace it with a "Xserve" CPU...
you will then have a unit that myself (and Mactron) has the famous...

FW 2003 1.33 Ghz OS MDD !

Oh these young hot-rodders!
It’s always faster… fasterFASTER!

If you don’t like the way that I drive
              …stay off of the sidewalk!


I will not begin looking to acquire an Xserve CPU.
I will not begin looking to acquire an Xserve CPU.
I will not begin looking to acquire an Xserve CPU.
I will not… (ad infinitum). ;)
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Offline refinery

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Re: Knowing which MDD Macs to avoid
« Reply #4 on: June 14, 2019, 03:02:08 PM »
you can put a 1.42 into an OS9-only MDD and it works fine. Ive been using one like that for years now. if you manage to find one with an all-copper heatsink, there's basically zero heat problems with that combo.
G4/MDD 1.42 (9), G4/GB 500DP (X), Beige G3 400 (upgraded) (9), PBG4Ti 1Ghz (X), PBG3WS 300 (9)

got my mind on my scsi and my scsi on my mind

Offline DieHard

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Re: Knowing which MDD Macs to avoid
« Reply #5 on: June 16, 2019, 11:14:17 AM »
you can put a 1.42 into an OS9-only MDD and it works fine. Ive been using one like that for years now. if you manage to find one with an all-copper heatsink, there's basically zero heat problems with that combo.

Yes, good point, but the Mactron 1.5 (1.33 Overclock single) stills runs cooler than a dual, and OS9 in almost all instances; won't take advantage of a Dual CPU :)

Offline macStuff

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Re: Knowing which MDD Macs to avoid
« Reply #6 on: June 16, 2019, 01:42:58 PM »
1.25 vs 1.33 lol
is the performance increase really worth all that effort? in swapping cpus?

my 1.25 will most likely stay a 1.25;
stock configuration is the lesser headache, imho.

Offline bsharvy

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Re: Knowing which MDD Macs to avoid
« Reply #7 on: June 16, 2019, 07:30:17 PM »
The 1.42 GHz models featured Firewire 800 and there is software available to run OS 9.2.2 on them here. I’ve several of these machines but still prefer the “lesser” 1.25 GHz models. Suppose that it really depends upon what your primary intended end-use actually is because the 1.25 models seem to run OS 9.2.2 easier, or with fewer “hiccups”.

Hi, thanks for the reply. I was thinking of the last generation of 1.42 GHZ modelss, that could boot OS 9. I figured they would ahve taken the problems with earlier models into account.

On separate note, can anybody identify this Mac, and advise on whether it's worth $50 sans harddrive.
https://portland.craigslist.org/mlt/sys/d/portland-apple-powermac-g4-quicksilver/6908137907.html


Offline MacTron

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Re: Knowing which MDD Macs to avoid
« Reply #8 on: June 17, 2019, 06:27:49 AM »
1.25 vs 1.33 lol
is the performance increase really worth all that effort? in swapping cpus?

my 1.25 will most likely stay a 1.25;
stock configuration is the lesser headache, imho.

The 1.33 is 6% faster than the 1.25, It have 2Mb of L3 cache which increases around 5% the overall CPU performance. So we have a 11% faster CPU. OK at this point It's a personal option because an 11% increase in performance it isn't so much ...
But if we overclock it to 1.5 Ghz ( which is a walk in the park ) we have an extra 13% of speed increase, So we have an 24% faster CPU than a stock 1.25, which in my opinion is actually worthwhile.
Please don't PM about things that are not private.

Offline macStuff

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Re: Knowing which MDD Macs to avoid
« Reply #9 on: June 17, 2019, 09:37:16 AM »
bsharvy: its not an actual quicksilver; its a "digital audio" g4,
i personally would grab it if you need a g4; its got alot in common with the real quicksilver units;
and i think u could order a 933mhz quicksilver cpu and swap it in; am i right guys?
are the digital audios compatible with the quicksilver cpus? they haev the same 133mhz FSB/Mem speed i think

ive never had a digital audio g4 ive always wanted one, but i have a sawtooth + quicksilver + mdd already;
dont need anymore G4s lol but if i had the chance to score one i probably would grab it

Mactron; i already knew your opinion would be that ;)  i stated my opinion; my opinion is different from yours.
thank god we live in a world where everyone is not the same.

Offline Protools5LEGuy

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Re: Knowing which MDD Macs to avoid
« Reply #10 on: June 17, 2019, 01:41:08 PM »
Chris,  all D. A.  can use the QS CPU daughter board if you make the 4th leg mod.
That mod is just give +12 volts to that 4th leg.
I have a DA originally 466 MHz and upgraded it with QS'02 GHz dual daughter board.
Looking for MacOS 9.2.4

Offline macStuff

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Re: Knowing which MDD Macs to avoid
« Reply #11 on: Today at 04:08:51 AM »
i dont have a DA. tell the guy asking the question, Bsharvy! not me!
im not doing any cpu mods.

Offline Protools5LEGuy

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Re: Knowing which MDD Macs to avoid
« Reply #12 on: Today at 07:29:07 AM »
Coward
 ;D
Looking for MacOS 9.2.4