Many of you know I am having trouble with my G5. I want to rule out the CPUs. What will happen if I put a pair of 1.8Ghz CPUs in there? I know the 2.0 runs at 1000Mhz, and the 1.8s run at 900Mhz FSB. Will the 1.8s still work , lowering the FSB of the system to 900Mhz? or will it just fry my logic board?
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Troubleshooting G5 CPUs
- Thread starter Zeke D
- Start date
- Sort by reaction score
It won't boot. G5 logicboards are CPU specific. Even just switching the existing CPUs A-B B-A will cause the cooling system to run at full speed all the time.
that's true because you then need to recalibrate the sensors. there's a specific software, which is a nightmare (it works 1 out of 5 CPUs).
however the question is still valid, wht are PowerMac G5 logic boards considered CPU specific?
Ben
CPU motherboard
The bus speed is set and is half the speed of the CPU. A faster CPU may work but not usually, and will not boot the other way. The ASD ( apple support disk ). 2.5.8 for 1.6 to dual 2.0.
Good luck
The bus speed is set and is half the speed of the CPU. A faster CPU may work but not usually, and will not boot the other way. The ASD ( apple support disk ). 2.5.8 for 1.6 to dual 2.0.
Good luck