replacing cpus in g4 towers | sawtooth>gigabit | mdd867>142 | g4da>quicksilverDP1ghz ?? - Macintosh Garden

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2013, November 18 - 11:13pm

#1

supernova777's picture

supernova777

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Joined: 2013 Mar 18

replacing cpus in g4 towers | sawtooth>gigabit | mdd867>142 | g4da>quicksilverDP1ghz ??

uhhh i had this all fresh in my mind a few weeks ago but ive now forgotten

question 1:
is it possible to take a sawtooth cpu out, say a singe cpu 450mhz and replace it with a dual processor 500mhz (gigabit ethernet) (ie substitute the cpu for the highest *WITHIN ITS PRODUCT LINE/MOTHERBOARD TYPE*)
??

i vaguely remember this as being yes but i want to confirm before i buy an expensive door stop;)

question 2:
is it possible to replace a dual processor mdd 867's cpu with a dual processor 1.25ghz processor?? and if so... what about the higher 1.42ghz cpu?

i vaguely remember this as being a yes also.... i think i read of some people doing this to be able to get the 1.42ghz highest g4 dual processor and still boot os9...

question 3:

digital audio g4 - im unfamiliar with these never had one.. apparently they have a differnet motherboard then the tother graphite cases? with 4 pci slots +1 agp more akin to the mdd/quicksilver then the sawtooth/gigabit models... im wondering if its possible to replace this cpu with a dual processor 1ghz quiksilver CPU??

can anyone confirm these? PLEASE!!!!!!!!!

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2013, November 18 - 11:47pm

#2

patrickb

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Joined: 2011 Nov 13

#1 Sawtooth single to dual depends on the logic board you now have
https://www.macupdate.com/app/mac/13551/uninorthasicchecker

#2 the dual 867 mdd has a slower logic board bus (133mhz) than the dual 1ghz, 1.25 & 1.42 logic board oof 167 mhz. So a dual 1ghz in the slower bus will run as a dual 800 mhz

The dual 1.42 will boot OS9 when in a non Firewire 800 MDD logic board

#3 http://forums.macrumors.com/showthread.php?t=1183181

2013, November 19 - 2:25am

#3

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supernova777

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Joined: 2013 Mar 18

perfect thanks for that info;)

so if i got a 1.42 ghz mdd dual processor .. and installed into my DP 867.. it would only show 1.25 ghz because of the lower mhz bus speed.. correct?

i just tried to run the uniNorthASICChecker app and its a .app file i suppose there is no os9 version of this app.. I assume id have to boot to mac os x somehow to run the checker.. I think i had done this before and it said it was ok ... hence why im still interested in doin so hah

2013, November 20 - 1:19am

(Reply to #3) #4

patrickb

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Joined: 2011 Nov 13

1.42 DP into the 133 bus would run around 1.13ghz (I think)

northbridge-number:
FOR OS X:
1. open terminal (in disk utilities folder)
2. type: ioreg -n uni-n | grep device-rev
3. press return
4. look where "device-rev" stands. The number following the seven zeros (0000000x) is the one you search. (For Sonnet Dual Upgrades a number higher than 3 is needed, 3 won't work. You can install a Single CPU)

FOR OS 9:
1. go to apple system profiler (under the rainbow apple in left corner)
2. from the menu select File > ne report
3. check the boxes for System profile and hardware overview, uncheck any other.
4. a ASP report pops up, click the button for "text document"
5. the last info is "uni -n:" where you can find the info you need (see above)
Taken from " http://forums.macrumors.com/archive/index.php/t-1315576.html "

2013, November 21 - 10:24am

#5

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supernova777

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Joined: 2013 Mar 18

thanks for the info patrickb:)