AAPL Stock: 110.78 ( + 0.4 )

Printed from

ZDNet offers Mac Pro Overclocking software

updated 04:10 pm EDT, Sat June 28, 2008

Mac Pro overclockable

ZDNet has announced what it says is the first tool for overclocking the Mac Pro. Windows options for overclocking are prevalent, but none have been available for the Mac Pro, according to ZDNet. It claims that the new software, called ZDNet Clock, is capable of speed increases of 15 to 20 percent, and most computers with 2.8GHz chips should be able to meet or exceed 3.2 GHz. The version 1.0 software supports Intel processors on a Mac Pro or Xserve and requires Max OS X 10.5; it is available for download now, free of charge.

The downloadable software self-detects the chips on launch and, using a slider tool, can increase clockspeed and frontside bus speed. ZDNet recommends jumps of 10MHz at a time in order to find highest stable speed, as each CPU will have have its own tolerances.

RAM chip quality can affect the overclocking process, according to the software developer: Hynix (the brand currently shipping in 2008 models), Kinsington and Transcend modules have worked well in testing.

ZDNet Clock comes with an error-tracking module to aid the user in checking stability, and gradually increasing speed until optimum stable speed for the chip is found.

by MacNN Staff





  1. coldfusion1970

    Joined: Dec 1969



    How do i overclock my first gen 2ghz Intel iMac?
    I want to get it over 3.06ghz.

  1. jarod

    Joined: Dec 1969



    Can anyone try this and confirm if it really works? Im not rich enough to afford blowing a $3K machine in case it doesnt.

  1. bearcatrp

    Joined: Dec 1969


    It works...

    Overclocked my 2ghz mac pro to 2.340 without FSB errors. Tried higher but received alot of errors. Encoded video while making changes. My test was a 1.99gb mpeg file encoding to dv. 2.0 took 16:50, overclocked to 2.340 and completed in 15:00. Go for it folks. BTW, the temps do rise so crank up the fans.

  1. aczeisler

    Joined: Dec 1969


    Error downloading

    I can't get this file to download properly. I get a .tar file that won't decompress without errors. Can anyone help?

  1. testudo

    Joined: Dec 1969


    hey macnn

    Did anyone else notice the page doesn't display correctly in Safari.

  1. ocfra

    Joined: Dec 1969


    Works here too!

    Overclocked Mac Pro original 3.0 to 3.2 - no errors so far!

    Much speedier!

    I noticed as I slowly upped the MHz that the console log entries refresh increased from every 8-9 secs to eventually 2 seconds!

  1. MindBlade

    Joined: Dec 1969


    Works great

    2008 MacPro Dual-Quad Xeon 3.2...was able to nudge it up to 3.46 gHz!

    Just watched the logs and took it up to where it could run for hours with no errors.

    I remember the old days with my Quadra 800 doing this with jumpers and clock crystals.....this is MUCH nicer!

  1. Athens

    Joined: Dec 1969



    what happens if you lock the machine up, how do you reset it so you can boot?

  1. solidmac

    Joined: Dec 1969


    Crashes straight away

    I have a 2.8 Xeon with 10GB ram and an Apple Raid card.

    I suspect that either my Raid0 set-up or the iRam DDR2 modules is what is causing the system to crash immediately after my 4th up-clocking.

    My procedure is to go 1% each time. But at the fourth the OS (X 10.5.4) crashes horribly. I then get message from my raid utility that "Raid set has been mounted with indeterminable data loss." Although no date has been lost.

    Ideas anyone??

Login Here

Not a member of the MacNN forums? Register now for free.


Network Headlines

Follow us on Facebook


Most Popular


Recent Reviews

Polk Hinge Wireless headphones

Polk, a company well-established in the audio market, recently released a new set of headphones aimed at the lifestyle market. The Hin ...

Blue Yeti Studio

Despite being very familiar with Blue Microphones' lower-end products -- we've long recommended the company's Snowball line of mics ...

ZTE Spro 2 Smart Projector

Home theaters are becoming more and more accessible these days, but maybe you've been a bit wary about buying a home projector. And h ...


Most Commented