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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 //EN">
<HTML>
<HEAD>
<TITLE>Overclocking Apple Mac mini</TITLE>
<META NAME="description" CONTENT="Overclocking guide for Apple Mac mini">
<META NAME="keywords" CONTENT="Apple, Mac mini, overclock, overclocking, clocking, over-clocking, upclocking, 1.25GHz, 1.42GHz, 1.5GHz, upgrade, Motorola, G4, 7447, processor, Macintosh, speed increase">
<LINK REL="SHORTCUT ICON" HREF="/favicon.ico">
</HEAD>
<BODY>
<H1>Overclocking Apple Mac mini</H1>
<TABLE border=0 width="100%" cellspacing="0" cellpadding="0">
<COLGROUP>
<COL width="70%">
<COL width="20%">
<TR><TD>
<IMG SRC="macmini_disc.jpg"></TD><TD ALIGN="LEFT" VALIGN="BOTTOM">
<P style="font-size: 8pt"><FONT FACE="Helvetica, Ariel">
Remember the good old 1980's,<BR>
When things were so uncomplicated?..
<BR ALIGN="LEFT" style="font-size: 8pt"><FONT FACE="Helvetica, Ariel">
<I>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ELO, "Time", 1981
<P>
</I>
</TD></TR></TABLE>
<HR>
<H2>Short Intro</H2>
<P>
I will stick to the very essentials - Mac mini is terrific! Read about it
<A HREF="http://www.google.co.uk/search?q=Apple+%22Mac+mini%22+review" TARGET="_blank">everywhere</A>.
<H2>Overclocking</H2>
<P>
Just like in any other Mac with 744x CPU, the speed is controlled by the jumpers.
Here is the bottom of the <A HREF="macmini_board.jpg" TARGET="_blank">board</A>. Or whatever you call it. Many years ago there were component side and solder side. Now I don't know... But before you rush into it, take a look at <A HREF="macmini_removed_jumpers.jpg" TARGET="_blank">the size of the jumpers</A>. Read 7447's <A HREF="MPC7457EC.pdf" TARGET="_blank">datasheet</A> if you are interested. Jumpers are located in the area directly under CPU.
<P>
<IMG SRC="macmini_jumpers.jpg">
<P>
<TABLE border=0>
<TR align="CENTER"><TD><B>Speed</B></TD><TD><B>R362</B></TD><TD><B>R358</B></TD><TD><B>R355</B></TD><TD><B>R351</B></TD>
<TR align="CENTER"><TD>1.25GHz</TD><TD>yes</TD><TD>yes</TD><TD>yes</TD><TD>-</TD>
<TR align="CENTER"><TD>1.42GHz</TD><TD>-</TD><TD>yes</TD><TD>-</TD><TD>yes</TD>
<TR align="CENTER"><TD>1.50GHz</TD><TD>-</TD><TD>-</TD><TD>-</TD><TD>-</TD>
<TR align="CENTER"><TD>1.58GHz</TD><TD>-</TD><TD>yes</TD><TD>-</TD><TD>-</TD>
</TR>
</TABLE>
<P>
I have settled on 1.42GHz speed for my original 1.25GHz Mac mini. <A HREF="1500mini.png" TARGET="_blank">1.5GHz settings</A> gave me some glitches in Xbench Altivec routines and very weird behaviour at 1.58GHz - the speed was reported by the system profiler as 750MHz(?!) I would guess 1.42GHz mini owners may be able to get 1.5GHz if they bother to try. Mind you it is only 6% increase so I am not sure if it is worth it. Well, at least I have 1.42GHz now and it works fine.
<P>
Enjoy!
<P>
<HR>
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&copy; <I><a href="mailto:lbodnar@dsl.pipex.com">Leo Bodnar</a>, published 2nd February 2005.</I> <A HREF="http://www.lbodnar.dsl.pipex.com">Home</A>
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