Mac OS 9 Discussion > Hardware

Power Mac G4 Chart - for comparing models (CPU | Cache | etc)

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supernova777:
OS9 POWERMAC G4 CHART
(excluding fw800 models that were previously thought not able to boot os9)


*agp macs below the digital audio model feature AGP 2x / digital audio and up feature AGP 4x

*As noted later in the thread there is a mistake in this chart (Based on a mistake int he info of everymac.com)
the 1.25 mdd single processor model does not feature 2MB backside cache

the 5 models that feature the 256k on chip L2/2mb backside L3 cache are:
1.25 DP MDD, 1.0 DP QS 2002, 800mhz DP QS, 933mhz QS, 867mhz QS
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_1.25_dp_mdd.html
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_1ghz_dp_qs.html
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_800_dp_qs.html
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_933_qs.html
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_867_qs.html

450 DP, 500 DP, 533 DA feature no "on chip" cache
while the 733 QS, 800 QS feature no "backside" cache

the 3 macs with 167mhz bus are:
1.25 SP MDD (2003), 1.0ghz DP MDD (2002), 1.25 DP MDD (2002)



grey horizontal lines dont mean anything other then those are the particular models that i acquired

MacTron:
There is a little error in your chart, I think.
The MDD 2003 1.25 single has 1Mb L3. Optionaly it could be purchased with dual 1.25 and this came with 2Mb L3 per CPU.

Only one dual 1.25 was made with 1Mb L3 per CPU and it came into FW800 models.
The others dual 1.25 have 2Mb L3 per CPU.

Those single and dual 1.25 that came with MDD 2003, alongside 1.42 from FW800 usually are 7455B and are the best for overclock. The others are 7455A.

I hope I explained well. May be a bit confusing...

You can add to the chart −if you like− :
− Digital Audio and QuickSilver don't have native audio imput.
− From Gigabit onwards all have 24v line for ADC.
− Only MDD and QuickSilver have AGP 4x and 48bit support for HD ( on QuickSilver this is only on the last models)

supernova777:

--- Quote from: MacTron on January 25, 2014, 01:19:38 PM ---There is a little error in your chart, I think.
The MDD 2003 1.25 single has 1Mb L3. Optionaly it could be purchased with dual 1.25 and this came with 2Mb L3 per CPU.

Only one dual 1.25 was made with 1Mb L3 per CPU and it came into FW800 models.
The others dual 1.25 have 2Mb L3 per CPU.

Those single and dual 1.25 that came with MDD 2003, alongside 1.42 from FW800 usually are 7455B and are the best for overclock. The others are 7455A.

--- End quote ---

i will double check!


--- Quote from: MacTron on January 25, 2014, 01:19:38 PM ---− Only MDD and QuickSilver have AGP 4x and 48bit support for HD ( on QuickSilver this is only on the last models)

--- End quote ---
I would guess the Dual 800 QS And the 933 QS....... (the units with same cpu type as MDD : "7455")

err so wait.. the 867mhz QS is AGP 2x?? not 4x?
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_867_qs.html <-- this says 4x
http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_733_qs.html <-- this says 4x
oh wait.. u meant ATA-100 disk ! not 4x.. ok.;)
everymac says that no qs has ATA-100.. maybe the 48-bit support was added initially in ATA-66 connection? and is not documented clearly?

supernova777:
hmm i was just offered a 533 digital audio that isnt booting up properly for $20 (1 beep, which means bad ram)
clearly his power supply works.. so what i was thinking is to put my QS 867mhz inside the Digital audio 533mhz board + case
to have my 867mhz cpu + 2mb L3 cache.... and have a working machine again and still have 4 pci slots..... fixed for $20  is not bad



theres no way i would want to modify the psu to QSpin out

actually they are pretty damn close!!!!!!
the extra 4 pins at the bottom, is this soley for the extra cpu power to the chip do u think?
I think the +25v line goes to the monitor...

supernova777:

--- Quote from: MacTron on January 25, 2014, 01:19:38 PM ---There is a little error in your chart, I think.
The MDD 2003 1.25 single has 1Mb L3. Optionaly it could be purchased with dual 1.25 and this came with 2Mb L3 per CPU.

--- End quote ---

http://www.everymac.com/systems/apple/powermac_g4/specs/powermac_g4_1.25_mdd.html this page says 2mb L3 Cache..
is it everymac who is wrong?

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