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Upgrading CPU in a B&W
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Fresh-Faced Recruit
Join Date: Feb 2007
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Someone gave me an old powermac b&w g3 a few days ago. I had an old g4 400mhz CPU laying aroundand I was wondering if the g4 CPU will work in the b&w.
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Dedicated MacNNer
Join Date: Jun 2001
Location: London, UK
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Senior User
Join Date: Apr 2002
Location: Stockholm Sweden
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If you want to have slightly more speed an other option is to overclock the G3! ( Accelerate Your Mac! - Yosemite Info) Allmost all B&W OC 50 MHz, some even 100 MHz and very few 150 MHz. I have used old harddisk jumpers to set the clock speed
Cheap and safe. A G4 will have marginal speed gains compared to a G3 if it not altivec code
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Moderator
Join Date: Apr 2000
Location: Gothenburg, Sweden
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Originally Posted by DrBoar
If you want to have slightly more speed an other option is to overclock the G3! ( Accelerate Your Mac! - Yosemite Info) Allmost all B&W OC 50 MHz, some even 100 MHz and very few 150 MHz. I have used old harddisk jumpers to set the clock speed
Cheap and safe. A G4 will have marginal speed gains compared to a G3 if it not altivec code
The gain for a G4 over a G3 is 15% for mixed code, but larger for pure floating point code. If the G4 will fit, your best bet is to do both: install the G4 and then overclock. The G4 should run at 450 MHz at least.
EDIT: Note that Apple uses Altivec extensively throughout the OS (9 and X), including in many memory operations. It accelerates more things than you think.
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Last edited by P; Feb 19, 2007 at 08:14 AM.
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