Low End Mac Reader Specials

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Chipping the Mac

Chipping the Quadra

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.

Quadra 650

The Quadra 650 has a 16.67 MHz oscillator which runs the processor at 33.33 MHz. The max oscillator you can replace it with while keeping the serial ports functional is 22 MHz, to run the processor at 44 MHz. If you don't need to use the serial ports, you can put in a 24 MHz oscillator, to run the processor at 48 MHz. With an Apple PPC card installed, the max oscillator you can use is 19.6992 MHz, to run the 68040 at 39.3984 MHz, and the PPC card at 78.7968 MHz.

Quadra 700

The Quadra 700 has a 50 MHz oscillator which runs the processor at 25 MHz. The max oscillator you can replace it with is 74 MHz, to run the processor at 37 MHz.

Quadra 800

The Quadra 800 has a 16.67 MHz oscillator which runs the processor at 33.33 MHz. The max oscillator you can replace it with while keeping the serial ports functional is 21 MHz, to run the processor at 42 MHz. If you don't need to use the serial ports, you can put in a 24 MHz oscillator, to run the processor at 48 MHz. With an Apple PPC card installed, the max oscillator you can use is 19.286 MHz, to run the 68040 at 38.572 MHz, and the PPC card at 77.144 MHz.

Quadra 840av

The Quadra 840av has a 20 MHz oscillator which runs the processor at 40 MHz. The max oscillator you can replace it with is 24 MHz, to run the processor at 48 MHz.

Quadra 900

The Quadra 900 has a 50 MHz oscillator which runs the processor at 25 MHz. The max oscillator you can replace it with is 74 MHz, to run the processor at 37 MHz.

Quadra 950

The Quadra 950 has a 67 MHz oscillator which runs the processor at 33 MHz. The max oscillator you can replace it with is 92.9405 MHz, to run the processor at 46.47025 MHz. With an Apple PPC card installed, the max oscillator you can use is 80 MHz, which will run the 68040 at 40 MHz and the PPC card at 80 MHz.

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Our advertising is handled by BackBeat Media. For detailed price quotes and advertising information, please contactat BackBeat Media (646-546-5194). This number is for advertising only.

Entire Low End Mac website copyright ©1997-2009 by Cobweb Publishing, Inc., unless otherwise noted. All rights reserved. Advice presented in good faith, but what works for one may not work for all. Please report errors to .
  LINKS: We allow and encourage links to any public page as long as the linked page does not appear within a frame that prevents bookmarking it.
  Access our RSS news feed at http://lowendmac.com/feed.xml.
  Email may be published at our discretion; email addresses will not be published without permission, and we will encrypt them in hopes of avoiding spammers. If you prefer your message not be published, mark it "not for publication." Letters may be edited for length, context, and to match house style.
  PRIVACY: We don't collect personal information unless you explicitly provide it. For more details, see our Terms of Use.
  Low End Mac is an independent publication and has not been authorized, sponsored, or otherwise approved by Apple Inc. Apple, the Apple logo, Macintosh, iBook, iMac, eMac, iPod, iPhone, PowerBook, MacBook, MagSafe, Mac Pro, Apple TV, and AirPort are registered trademarks of Apple Inc. Additional company and product names may be trademarks or registered trademarks and are hereby acknowledged.