Mac G4 Processor Cache - Please read and contribute findings

[Protools5LEGuy]

thats perfect. except yea the 867mhz is a dual too! not single.. this mdd i have too;)
but its a great illustration.. good work;)
so this xserve g4 1.33ghz cpu is compatible with any mdd?
hmmm

It seems that the best models are the first gen. Mdd 1.25 and the 2003 dual model, as the one most wanted, the fw800 1.42. How can perform an overclock an xserve 1.33 dual? Never heard of this Cpu modules on mdds .

[MacTron]

How can perform an overclock an xserve 1.33 dual? Never heard of this Cpu modules on mdds .

Exactly as the 1.42 Dual. AFAIK

[Protools5LEGuy]

On a 133 machine a dual 1.33 166 bus cpu should work at dual ghz.... With 2 mb l3 cache. That would make parity with my DA with cpu module QS02 DUAL GHZ! That cpu module is NOW the most wanted item after the 1.42 module and the copper heatsink.

[supernova777]

On a 133 machine a dual 1.33 166 bus cpu should work at dual ghz.... With 2 mb l3 cache. That would make parity with my DA with cpu module QS02 DUAL GHZ! That cpu module is NOW the most wanted item after the 1.42 module and the copper heatsink.

are u going to upgrade the cpu of this 867mhz mdd? to xserve dual 1.33ghz?

[Protools5LEGuy]

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!

Sorry, first trick yours I wont do.
This MDD was frozen in 2004 and was not booted since then till last winter. It even has the original noisy PSU... I love it as is.

[Protools5LEGuy]

are u going to upgrade the cpu of this 867mhz mdd? to xserve dual 1.33ghz?

Maybe if I find a thin aluminum heatsink...

[supernova777]

Sorry, first trick yours I wont do.
This MDD was frozen in 2004 and was not booted since then till last winter. It even has the original noisy PSU... I love it as is.

frozen in time.. like captain america?
u should replace the fans! its not hard! it makes a big difference if u use fans that connect straight to 4pin molex so the fan speed is constant and doesnt speed up/slow down

[MacTron]

On a 133 machine a dual 1.33 166 bus cpu should work at dual ghz.... With 2 mb l3 cache. That would make parity with my DA with cpu module QS02 DUAL GHZ! That cpu module is NOW the most wanted item after the 1.42 module and the copper heatsink.

On a 133 machine a dual 1.33 166 bus cpu should work at dual at 1.066 Ghz without CPU or BUS overclock.

[MacTron]

Picture fixed.

[IIO]

My 1.25GHZ G4 is showing 1MB L2 cache. I thought it was supposed to be 2MB. Is that normal?

1 mb per processor makes a total of 2 mb.

[supernova777]

great illustration of a complex concept;) very simple + easy to understand
at first it hought it was a joke;) ehehe

[MacTron]

great illustration of a complex concept;) very simple + easy to understand
at first it hought it was a joke;) ehehe

Thank You. Its from an old spreadsheet I have done.
I'll hope now it doesn't have more errors...

OMG, I just find two new ones!
Thanks God, it is almost nothing...

[IIO]

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!

in europe we had a single processor 1.0 GHz entry model when the MDDs came out.

[blemk]

how do u have 167mhz bus speed?
the sonnet app itself overclocks 133mhz g4 to 167?

167 Mhz is the "native" bus speed of MDDs. (by the way, it can be overclocked to 172 with motherboard oscillator change) although some "low end" MDD's were working at 133 Mhz for marketing reasons  (this is easy recoverable via motherboard multiplier resistors settings). Well I never have done it, it is easiest try to acquire the good ones (167 Mhz)

Sorry to bring back an old thread, but I have seen you reference the 172 MHz bus clock a couple time but not sure where you got the info. Very curious if you have URL/doc/etc laying around yet with this info?

[MacTron]

how do u have 167mhz bus speed?
the sonnet app itself overclocks 133mhz g4 to 167?

167 Mhz is the "native" bus speed of MDDs. (by the way, it can be overclocked to 172 with motherboard oscillator change) although some "low end" MDD's were working at 133 Mhz for marketing reasons  (this is easy recoverable via motherboard multiplier resistors settings). Well I never have done it, it is easiest try to acquire the good ones (167 Mhz)

Sorry to bring back an old thread, but I have seen you reference the 172 MHz bus clock a couple time but not sure where you got the info. Very curious if you have URL/doc/etc laying around yet with this info?

The MDD bus can be changed from 133 to 166, just changing some resistors in the Motherboard. But If you already have an 166 Mhz Bus System, The only way to go further is to change the base quartz oscillator of the motherboard. Here you have the info:

http://forum.macbidouille.com/index.php?showtopic=208076

But it is mixed with the Digital Audio (and Quick Silver) bus overclock.
... and is in French.

[DieHard]

Here is an MDD with Stock Apple CPU Upgrade (without any overclocking)

System 3 (Modified 2002 MDD)
Mac G4 MDD 1.33 Ghz. Single, Serial Number XB2410JQMXD
Model Number..: M8570
Sales Number...: M8573LL/A, M8689LL/A, M8787LL/A, M8839LL/A, M8840LL/A, M8841LL/A, M9145LL/A
Production Year.: 2002
Production Week: 42 (October)
Apple Hardware Test Version 1.2.7 (For MDD)
CPU...: PowerPC,G4 @ 1333 Mhz.
Cache: 2048K L3 @ - 135 Mhz.

Cache: 2048K L3 @ - 135 Mhz. How can this be possible ??
A fast, Single G4 stock CPU with 2 MB Cache (Perfect for DAW, runs cool)

Easy... Look at Mactron's chart above, buy an OS X Only Xserve, scrap the unit and put the CPU in an MDD with 167 Mhz. bus and BAM... OS 9 Single CPU Rocket

[Metrophage]

I did the same thing a few years back. I needed a CPU and for whatever reason all of the MDD ones I was finding were listing for several times the cost as Xserve units. The Xserve processors work fine. But you still need a MDD compatible heatsink.

[supernova777]

I did the same thing a few years back. I needed a CPU and for whatever reason all of the MDD ones I was finding were listing for several times the cost as Xserve units. The Xserve processors work fine. But you still need a MDD compatible heatsink.

well u could always go liquid cooling 

[DieHard]

The Xserve processors work fine. But you still need a MDD compatible heatsink.

Yes very True, but that stock Aluminum thick Heatsink (as opposed to the thin one that looks like stainless steel) that comes with the 2002 Dual 1.25 works perfectly, so just aquire the CPU, clean the heatsink and CPU (look online) and use a small amount of Arctic silver (very small amount).  Very Easy Upgrade.

Also, from the MacTron Testing Labs, I will list the MDD heatsinks in order of BEST to Worst as far as heat transfer/Temperature:

1) Copper MDD Heatsink (comes with Dual 1.42 or buy aftermarket) TEMP = −5C
2) Thick Aluminum (Kinda looks like other G4 heasinks) TEMP = −1.7C
3) Thin Aluminum (Looks like stainless Steel) TEMP = 0C