Low End Mac Reader Specials

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Chipping the Mac

Chipping the Power Mac x100

Many Mac models can be "chipped" to run at a higher speed. These pages provide information on the maximum reliable speed. This may vary from one machine to the next. Chipping is not authorized by Apple. Any modifications you perform on your Mac may damage it and will void any warranty. Modifications are done at your own risk.

Be sure to visit Marc Schrier's Clock Chipping Home Page, the definitive resource on chipping the Mac.

Power Mac 6100, Performa 611x

The Power Mac 6100/60 (a.k.a. Performa 611x) has a 30 MHz oscillator which runs the processor at 60 MHz. The Power Mac 6100/66 has a 33 MHz oscillator to run the processor at 66 MHz. The max oscillator you can replace it with is 42 MHz, to run the processor at 84 MHz. At 60 MHz, the Gestalt is 75, at 66 MHz it is 100, and at 80 MHz it is 101.

Power Mac 7100

The Power Mac 7100/66 has a 33 MHz oscillator which runs the processor at 66 MHz. The Power Mac 7100/80 has a 40 MHz oscillator to run the processor at 80 MHz. The max oscillator you can use in the 7100/66 is 42 MHz, to run the processor at 84 MHz. The max oscillator you can use in a 7100/80 is 43 MHz, to run the processor at 86 MHz. At 60 MHz, the Gestalt is 111, at 66 MHz it is 112, and at 80 MHz it is 113.

Power Mac 8100

The Power Mac 8100/80 has a 40 MHz oscillator which runs the processor at 80 MHz. The Power Mac 8100/100 has a 33.33 MHz oscillator to run the processor at 100 MHz. The Power Mac 8100/110 has a 36.67 MHz oscillator to run the processor at 110 MHz. The max oscillator you can use in the 8100/80 is 48 MHz, to run the processor at 96 MHz. The max oscillator you can use in a 8100/100 is 42.9545 MHz, to run the processor at 128.8635 MHz. The max oscillator you can use in the 8100/110 is 45 MHz, to run the processor at 135 MHz. At 60 MHz, the Gestalt is 61, at 66 MHz it is 64, at 80 MHz it is 65, at 100 MHz it is 55, at 110 MHz it is 40, and at 120 MHz it is 12

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