Welcome to the Clock Chipping Home Page

To ease access to some of the most up to date information on crystal oscillator swapping/acceleration on Apple Macintosh (and clone) computers I've started this Clock Chipping Home Page. Please send me any information you think should be added.

Please fill out and submit the Clock Chipping Statistics Survey form if you have clock chipped your machine so we can maintain a large set of statistics for the Clock Chipping Statistics page. If you are just visiting for the first time, please come back later if you clock chip your machine.

Mac Crystal Oscillator Speedup History 2.6

• Machine Specifics
• Modification Techniques Table
• Modification Techniques
• Modification 1
• Modification 2
• Modification 3

Clock Chipping Software Incompatibilities

Clock Chipping Y2K News Flash

Base Machine

Apple

• 65c02
• Apple IIc Plus Slowdown (Okay so it's not a Mac but...)
• 68000
• Mac 128 (cannot be clock chipped)
• Mac 512 (cannot be clock chipped)
• Mac 512KE (cannot be clock chipped)
• Mac Classic (cannot be clock chipped)
• Mac Plus 1GHz Speedup
• Mac SE (cannot be clock chipped), but check out the MacWorld Review on the old BrainStorm Accelerators.
• Mac XL Speedup
• 68020
• Mac II (cannot be clock chipped)
• Mac LC (cannot be clock chipped)
• 68030
• Color Classic (cannot be clock chipped) Resolution Enhancement
• Color Classic II (cannot be clock chipped)
• Duo Clip or the newer Duo Clip revision 2 by Ronald Leenes (r.e.leenes@bsk.utwente.nl)
• Mac IIci (cannot be clock chipped)
• Mac IIcx (cannot be clock chipped)
• Mac IIfx info
• Mac IIsi (See the History File)
• Mac IIvi (cannot be clock chipped)
• Mac IIvm (P600) (cannot be clock chipped)
• Mac IIvx Speedup
• Mac IIx (cannot be clock chipped)
• Mac Classic II (cannot be clock chipped)
• Mac LC 520 (cannot be clock chipped)
• Mac LC 550 (P550, P560) (cannot be clock chipped)
• Mac LCII (P40x, P410, P430) Speedup
• Mac LCIII (P450) Speedup
• Mac LCIII+ (cannot be clock chipped)
• Mac SE/30 (cannot be clock chipped)
• Mac TV (cannot be clock chipped)
• Performa 200 (cannot be clock chipped)
• Performa 450 (Mac LCIII) Speedup
• Performa 46x (cannot be clock chipped)
• PowerBook 140 Modification by Glenn Nelson (gwnelson@tddcae99.tddeng00.fnts.com) and Jerry Cupples (jcupples@iphase.com)
• 68040
• C610(See the History File)
• C610 Ethernet Modification by Eckart Hasselbrink (Hasselbrink@fhi-berlin.mpg.de)
• 610 Tidbits
• C650(See the History File)
• C650 Serial Port Modification by Marlin Prowell (mbp@januscom.com)
• WOMBAT (C650, Q650, Q800) Tidbits
• Oscillator Switch for C/Q 650's with PPC PDS Cards by James Lockman (Lockjaw8Y9@aol.com)
• C660av/Q660av Tidbits
• Mac LC575 (P57x) Slowdown
• Mac LC575 (P57x) Speedup by Masato Ohta (masato@apple.email.ne.jp)
• Mac LC580 (cannot be clock chipped)
• Performa 580 (cannot be clock chipped)
• Q605 (LC475, P47x) Speedup (33MHz) by Alexander W. Chin (alex@gerulf.acsu.unsw.edu.au)
• The 475/605 "25 to 33 and back" Switch by Ralph Schwegler (rschwegler@sgcl1.unisg.ch)
• Q605 (LC475, P47x) Speedup (40MHz) by Hiromasa Yamaoka (hiromasa_yamaoka@nifty.com)
• Q605 (LC475, P47x) Speedup (40+MHz) by Masato Ohta (masato@apple.email.ne.jp)
• Q610(See the History File)
• 610 Tidbits
• Quadra 630 (LC630, P63x, P640) Speedup
• Q650(See the History File)
• WOMBAT (C650, Q650, Q800) Tidbits
• Oscillator Switch for C/Q 650's with PPC PDS Cards by James Lockman (Lockjaw8Y9@aol.com)
• Q700(See the History File)
• Q800(See the History File)
• WOMBAT (C650, Q650, Q800) Tidbits
• Q840av(See the History File)
• Q900(See the History File)
• Q950(See the History File)
• PPC601 and 601+
• PM6100/60 (P611x) (See the History File)
• PM6100/66 (See the History File)
• PM7100/66 (See the History File)
• PM7100/80 (See the History File)
• PM7200/75 (PowerMac 7200 and 8200 Speedup by Peter Wypich (peter@iht.rwth-aachen.de))
• PM7200/90 Speedup or PowerMac 7200 and 8200 Speedup by Peter Wypich (peter@iht.rwth-aachen.de)
• PM7200/120 (PowerMac 7200 and 8200 Speedup by Peter Wypich (peter@iht.rwth-aachen.de))
• PM7500/100 Speedup
• PM8100/80 (See the History File)
• PM8100/100 (See the History File)
• PM8100/110 (See the History File)
• PM8200 (PowerMac 7200 and 8200 Speedup by Peter Wypich (peter@iht.rwth-aachen.de))
• PPC603 and 603e
• PM4400/160 Speedup by Andreas Kann (andreas.kann@dortmund.netsurf.de)
• PM52xx (On Takashi Imai's site)
• PM53xx (On Takashi Imai's site)
• PM54xx (On Takashi Imai's site), Clocking the 6400 on The 6400 Zone by Thomas Koons (thomas@zone6400.com), and 6400 Results by Ed Nye (nye@mcn.net)
• Multiplier Quick Change Block by Ed Nye (nye@mcn.net)
• PM55xx (On Takashi Imai's site)
• PM62xx (On Takashi Imai's site)
• PM63xx (On Takashi Imai's site)
• PM64xx (On Takashi Imai's site), Clocking the 6400 on The 6400 Zone by Thomas Koons (thomas@zone6400.com), and 6400 Results by Ed Nye (nye@mcn.net)
• Multiplier Quick Change Block by Ed Nye (nye@mcn.net)
• PM65xx (On Takashi Imai's site)
• PowerBook 1400 Info
• PowerBook 3400/180 Speedup by Robert Marshall (rlmarshall@topher.net)
• PowerBook 3400/200 Speedup by Joe Vantaggi (joevan@en.com)
• Tanzania Speedup by Andreas Kann (andreas.kann@dortmund.netsurf.de)
• PCI Machines (7300, 7500, 7600, 8500, 9500)
• PPC601+
• 100MHz Card
• PPC604e Bus:Processor Modification (On Takashi Imai's site)
• Backside Socket
• 120MHz Card
• 132MHz Card
• 150MHz Card
• 166MHz Card
• 180MHz Card
• 200MHz Card
• 233MHz Card
• 300MHz Card
• MP 200MHz Card and Apple/Daystar Digital nPower Dual Processor 604e Clock Chip by Ed Tam (estam@eecs.umich.edu)
• PCI Machines (8600 and 9600) Inline Cache Processor Card Modification (On Takashi Imai's site)
• 250MHz Card
• G3 (aka PPC750)
• PMG3/233 and PMG3/266
• PMG3/300
• PowerBook G3 Speedup
• iMac Modification (On Takashi Imai's site) and Clock-chipping the iMac by Dan Buettner (nickndan@earthlink.net)
• iMac 333 Speedup Tidbits
• iBook Modification (On Takashi Imai's site)
• iMac DV Modification (On Takashi Imai's site)
• G4 (7400, 7410, 7450, & 7455)
• AGP Graphics (350, 400, 450, & 500 MHz)
• Apple G4 Sawtooth CPU Module Speed Settings by Michiro Isobe on the Accelerate Your Mac! Web Page
• PCI Graphics (350 & 400 MHz)
• Power Macintosh G4 (PCI Graphics) ClockUp (On Takashi Imai's site)
• Gigabit Ethernet (400, Dual 450 & Dual 500 MHz)
• Dual G4/500 CPU Module Bus/CPU Ratio Settings by Michiro Isobe on the Accelerate Your Mac! Web Page
• Digital Audio (466, Dual 533, 667, & 733 MHz)
• An Overview and Speed Settings of MPC7450 CPU module by Michiro Isobe on the Accelerate Your Mac! Web Page
• Power Macintosh G4 (Digital Audio) UpClock (On Takashi Imai's site)
• QuickSilver (733, Dual 800, & 867 MHz)
• PowerMac G4/733 Speedup on the Accelerate Your Mac! Web Page
• Power Macintosh G4 (Quick Silver) UpClock (On Takashi Imai's site)
• 2002 QuickSilver (800, 933, & Dual 1000 MHz)
• 1 GHz Dual Processor Quicksilver PowerMac G4 Speedup to 1.2 GHz
• PowerBook G4 400 to 500 MHz Speed Bump by The Voelker Research Guys (speedbump@voelker.com)

Clones

Power Computing Corporation

• Power 100 Speedup
• Power 120 Info
• Power Center 132 Info
• Power Center 180 Info
• PowerBase 200 Speedup on Cedric Moreau's page (cedric.moreau@mail.dotcom.fr)
• 604e Card Mods on the PowerPC.org Page

Radius

• 81/110 Speedup

UMAX

• SuperMac C500 (Apus 2000) Speedup (In Japanese)

Accelerator Cards

Apple

• PPC Card (Q605 (LC475), Q630)
• Q605 (LC475, P475, P476) Speedup w/Apple's PPC card
• Q605 (LC475, P475, P476) Hack for Apple's PPC card by Chad Leigh (chad@xmission.com)
• Quadra 630 (LC630, P630, P631, P635, P636, P638, P640) Speedup (PPC Part)
• PPC PDS Card (C610, C650, Q610, Q650, Q800)

Daystar

• Daystar Universal Power Cache by Greg Shafritz (gshafritz@dellnet.com)
• Turbo 040i (20MHz) by Brad Wilson (bwilson@deltanet.com)
• Turbo 040i (33MHz) by Tan Tywee (tantywee@singnet.com.sg)
• Turbo 040i (40MHz)
• Turbo 601/66 by Jeff Walther (trag@io.com)
• PowerCard 601 (Same as the above Apple PPC Card)
• PowerPro 601

Newer Technology

• MAXpowr PCI Cards
  • MAXpowr 220MHz G3 PCI Cards
  • MAXpowr 250MHz G3 PCI Cards
  • MAXpowr 266MHz G3 PCI Cards
  • MAXpowr 300MHz G3 PCI Cards
• MAXpowr G3 L2(A) Cards (Tanzania)
• MAXpowr G4 ZIF

Sonnet Technologies

• QuadDoubler 68040 Cards
• Crescendo NuBus G3 Cards

Dos Cards

• Apple Macintosh DOS Compatibility Card
• Report: Houdini & Clock-chipping by Eric Hsu (erichsu@uclink.berkeley.edu)
• Apple PC Compatibility Card

Heatsink/Fan Info

• How to build a 68040 Fan by Dan Gezelter (gezelter.1@nd.edu)
• Motorola 68040 Thermal Plots

Parts Suppliers

• Digi-Key
• Fry's Electronics
• Output Enablers

Public Domain/Commercial Software

• Benchmarking Software
• Diagnostic Software
• System Enablers/Patches

Several Speedometer 4.02 Benchmark Files

Newsgroups where Clock Chipping is frequently discussed, and questions can be posted:

comp.sys.mac.hardware.misc          (Miscellaneous Macintosh Hardware)
comp.sys.powerpc                    (PowerPC's)

Other useful resources:

Accelerate Your Mac! by Mike Breeden
AV FAQ by James Wang (jwang@csua.berkeley.edu)
Gestalt Selectors List by Rene G. A. Ros (rgaros@bio.vu.nl)
comp.sys.m68k Frequently Asked Questions (FAQ) by Robert Boys (r.boys@genie.geis.com)
MicroProcessor Info Page by Chris Stone (cjstone@cmu.edu)
The Crabolator Page by Mike Davis (xdcrlab@quake.net)
Aaron's Little Clip Page by Aaron Ham (hevymetl@megamed.com)
Overclocking Page for those unfortunate enough to have a PeeCee.

This page is written and maintained by Marc Schrier (schrier@mac.com)
Partner in Output Enablers, Makers of the Zippy Clip and Rocket Socket