Author Topic: Mac G4 Processor Cache - Please read and contribute findings  (Read 34971 times)

Offline lokki

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #20 on: March 08, 2014, 03:55:43 AM »
System 4
Mac G4 MDD 1.25 Ghz. Dual, Serial Number CK307H01MXD
Model Number..: M8570
Sales Number...: M9145LL/A
Production Year.: 2003
Production Week: 08 (February)

Apple Hardware Test Version 1.2.7 (for MDD FW400)
CPU...: 2 x PowerPC,G4 @ 1250 Mhz.
Cache: 2048K L3 @ - 178 Mhz.

Note: Mac OS 9 System Profiler Reports 2 MB L2 Cache
MDD Dual @1.42Ghz, Powerbook TI @1Ghz

Offline DieHard

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #21 on: March 09, 2014, 10:18:33 PM »
Thanks Lokki.... this verifies my findings that the 9.2.2 version of the system profiler is actually reading the cache size correctly (although it reports L3 as L2).

Even though I have setup many of these units for clients over the years, I always assumed the cache size on the Dual 1.25 and the Single 1.25 CPU versions of the 2003 MDD were the same... bad assumption... I just never looked closely enough and that is the reason I started the thread, to compare units that were stock... I own both single and Dual 1.25 units... but I do not think any are stock anymore (their SN#s and white labels don't match their configurations)... I Swapped so many CPUs in these units over the years that I was hoping people would post their findings on stock units... so, thanks :)

Interesting coincidence, the cache on your dual clocks exactly the same speed as a single that I posted @ 178

So... it is clear now we should update all references to state the the ultimate stock OS 9 unit would be the Dual 1.25 (so you get the 2 MB cache) and simply leave all multiprocessor support disabled (for stability). But the jury may be out since now we have more heat and more fan noise with the duals.  Many DAW plugins and even some hosts (such as Cubase) crash with having the multiple CPU options enabled... so in the end you will have a single 1.25 with double the cache.... maybe the hard core Logic users can heavy test the Multi VS Single CPU scenario and post results... If there is a DAW program that runs stable with dual CPUs it would most likely be Logic.

I lastly want to note.... the reason I suggest the whole "1 GB MAX" instead of 1.5GB is that although Mac OS 9 supports a maximum of 1.5 GB of memory, it only supports a maximum of 1 GB allocated to a single application and I strongly believe that some of these programs do not respect that limit and go outside of the 1 GB limit and crash (just a theory), since I have definitely found bugs (in Cubase anyway) that only seem to crop up when the total memory is above 1 GB.  To add to the confusion, Mactron allocates more than a 1 GB to Kompakt and it works great so... who knows ?

Offline Syntho

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #22 on: March 09, 2014, 10:47:10 PM »
Would it be possible to actually physically remove a CPU from a DP, or would disabling it somehow be the better option?

I'm wondering if I should go with a DP version for the extra cache and mod it 'til it's quiet.

Offline DieHard

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #23 on: March 09, 2014, 10:54:58 PM »
No way to remove... just get a dual, do all noise mods and don't enable it

Offline Syntho

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #24 on: March 09, 2014, 10:56:09 PM »
Will the 360W power supply work in a DP? I've already got it modded.

Offline Jakl

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #25 on: March 09, 2014, 11:29:54 PM »
Also with the mdd the power supplies seem to break down when continuously plugged into a live plug - electrical switch turned on continuously. I read somewhere that the best way to keep your power supply in your mdd from breaking down is to remove the plug totally from the wall socket or extension board after shut down. Apparently the power board has a tendency to let current in while sitting idle and this is what can cause problems for the tired old power supplies.
I've had to replace my power supply 3 times over the past 11 or so years so far. Each time when left alone plugged into power while the power switch was turned on.
Unplug the cord from your mdd computer when not using it or shut down. This will definitely help prolong the use of your mdd PS.

Offline lokki

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #26 on: March 10, 2014, 05:14:51 AM »
i have the 360w power supply. so far it is working without problems.
MDD Dual @1.42Ghz, Powerbook TI @1Ghz

supernova777

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #27 on: March 10, 2014, 12:02:05 PM »
Also with the mdd the power supplies seem to break down when continuously plugged into a live plug - electrical switch turned on continuously. I read somewhere that the best way to keep your power supply in your mdd from breaking down is to remove the plug totally from the wall socket or extension board after shut down. Apparently the power board has a tendency to let current in while sitting idle and this is what can cause problems for the tired old power supplies.
I've had to replace my power supply 3 times over the past 11 or so years so far. Each time when left alone plugged into power while the power switch was turned on.
Unplug the cord from your mdd computer when not using it or shut down. This will definitely help prolong the use of your mdd PS.

sorry not sure im understanding u correctly..
did you mean that your power supply was damaged by being left plugged into the outlet.. while being POWERED OFF?

Offline lokki

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #28 on: March 10, 2014, 04:03:14 PM »
Quote
Interesting coincidence, the cache on your dual clocks exactly the same speed as a single that I posted @ 178

actually it's your dual... i took your post as a template. when you responded that it was the same as on your machine i thought: copy/paste error. but i checked again, it is 178 mhz  :D
MDD Dual @1.42Ghz, Powerbook TI @1Ghz

Offline Jakl

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #29 on: March 10, 2014, 07:40:00 PM »
Quote
sorry not sure im understanding u correctly..
did you mean that your power supply was damaged by being left plugged into the outlet.. while being POWERED OFF?

Yes exactly...and to stick on the safe side I pull the cord out of the power
socket totally if I'm not using the machine.
« Last Edit: March 10, 2014, 08:30:54 PM by chrisNova777 »

Offline DieHard

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #30 on: March 10, 2014, 11:09:02 PM »
Lokki, I meant to say Dual... lol... as Bugs would say "What a maroon"


supernova777

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #31 on: July 15, 2014, 08:08:42 PM »
http://toronto.en.craigslist.ca/tor/sys/4555183429.html

check this out


how does a dual 1.25 have 1mb cache?????
all the other *dual* 1.25 screens ive read have said 2mb per procesor (Which actually would equal 4mb l3 cache?)
confusing
« Last Edit: July 16, 2014, 03:13:59 AM by chrisNova777 »

Offline Syntho

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #32 on: July 16, 2014, 03:00:43 AM »
Well if this ain't confusing.

Offline MacTron

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #33 on: July 16, 2014, 09:23:54 AM »
how does a dual 1.25 have 1mb cache?????

Because this CPU module is on a  / or is from a MDD 1.25 Dual FW800.
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Offline MacTron

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #34 on: July 16, 2014, 09:25:01 AM »


:)
« Last Edit: July 16, 2014, 11:01:21 AM by MacTron »
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Offline Protools5LEGuy

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #35 on: July 16, 2014, 09:40:00 AM »
Mactron, where is my mdd 867 dual?
It has 1 mbyte l3 cache per proc. And 133 bus...
Never heard of 827... And mono processors? All first gen of mdd was dual
Looking for MacOS 9.2.4

supernova777

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #36 on: July 16, 2014, 09:42:54 AM »
LOL!!  ;D ;D ;D
thats perfect. except yea the 867mhz is a dual too! not single.. this mdd i have too;)
but its a great illustration.. good work;)
good to know my cpu type is 7455B on my 1.25(2003)single

the 'mactronn guide' LOL!
so this xserve g4 1.33ghz cpu is compatible with any mdd?
hmmm
« Last Edit: July 16, 2014, 09:52:55 AM by chrisNova777 »

Offline MacTron

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #37 on: July 16, 2014, 09:53:29 AM »
Mactron, where is my mdd 867
Never heard of 827... And mono processors?
This is my new old trick:
You must drop a full beer into your MDD 867 dual, let it dry. And if you are lucky enough that it starts up again, you can have such a configuration or even more weird!
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supernova777

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #38 on: July 16, 2014, 09:55:09 AM »
LOL! drunken spaniard mdd  -afro-

Offline MacTron

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Re: Mac G4 Processor Cache - Please read and contribute findings
« Reply #39 on: July 16, 2014, 09:56:48 AM »
OK, I'll fix it as soon as I can... -afro-
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