If your old G3 is getting long in the tooth and not quite up to handling the
ever larger digital photo and graphic files that seem to become so much more turgid
in your formerly speedy computer, maybe it's time for a speed boost. For writing,
database chores and handling digitized film scans, my old Blue & White G3 (350
MHz speed) was an admirable trooper, delivering sufficient speed to make all the
processing seem almost seamless and quite rapid. It was another matter when I started
doing digital photography. Now I passed into another world where waiting for an application's
function to complete became the norm rather than exception. Raw image files from
my camera took an excruciatingly long time to convert to an editable TIFF format.
Following that, the Photoshop editing of the 16-bit TIFF files took 10-20 seconds
to complete an image change. All in all it was time for a change.
With the rapid Apple evolution to fast G4s and even faster G5s, I found myself wondering
whether and where I should plunk down my dollars. Attractive as the G5s were, I was
not happy with Apple's decision to make them OS X exclusively bootable. I wanted
the option to choose my OS 9 operating system. I had old but quite serviceable SCSI
digital scanners and inkjet printers that might become unusable due to lack of available
drivers compatible with OS X.
So it came as a pleasant task to test FastMac's rather inexpensive processor upgrade.
For less than a $200 investment, FastMac will breath new life into your Blue &
White G3 worthy of a minor religious experience.
600 MHz G4 Processor Upgrade
for 350 MHz Blue & White G3
G4 ZIF Socket Upgrade (500-600 MHz)
The FastMac package came with its G4 CPU upgrade module, a packet of jumper plugs
for setting processor speed, and several CDROM operating system installer bundles
for both the OS 9.2 and OS X operating systems. The G4 module is almost physically
identical to the G3 module in the B&W (see photo below). The disks contained
Mac OS 9.2.2, which becomes the "Classic OS", and Mac OS 10.1 with a 10.2
upgrade. In addition, the package included an OS X Developer Tools disk and one FastMac
disk containing a 10-page instruction manual in Adobe PDF format and the FastMac
G4 Enabler application that unlocks the motherboard support for the FastMac G4 chip.
Note that FastMac included
no hard copy of the instruction manual, so I recommend that you print out the ten-page
manual before you begin installation. The written and pictorial instructions are
quite minimal, but the installation is so simple that they are quite sufficient.
Installing the upgrade ZIF (Zero Insertion Force) module is quite straightforward.
It's essentially a one-for-one swap of the main processor CPU plug-in.
The only necessary tools are a screwdriver for prying off the module retainer clip
and a needle-nose pliers or tweezers for inserting the board jumpers. The manual's
steps are quite well detailed. Here are the main points:
- Place FastMac CDROM in
- Reboot computer with
Blue & White Programmer button pressed.
- Click on "Enable
G4" application to install.
- Shut down computer.
- Unplug computer and open
- Remove "Void
Warranty If Seal is Removed/Broken" label from atop Jumper Block. Your computer
warrantee has already expired anyway. Remove Jumper Block.
- Place jumpers into slots
as shown in manual.
- Remove heat sink over
CPU chip by unsnapping clip.
- Pull up the CPU release
lever and pull the CPU up and off. Set aside.
- Place the FastMac XPU
upgrade into the ZIF slot.
- Push CPU release lever
back into place.
- Replace heat sink and
- Close computer &
The installation went
quite smoothly, and the ZIF CPU module slipped right into place. There are, however,
a couple of areas that could merit improvement. The jumpers are relatively easy to
install, but they are somewhat of a mild effort to install due to their small size.
If FastMac could offer a plug-in jumper block similar to the original Apple Jumper
block, the exchange would be a snap.
Surprisingly, in a minor oversight, neither the original CPU nor the FastMac replacement
had any thermal paste between the heat sink and the CPU chip. Certainly, if there
were some thermally conductive paste supplied, the CPU would run cooler and it might
improve its longevity and performance.
OS 9 Benchmark Tests
The benchmark test comparisons were run between the 350 MHz G3 and the 600 MHz
G4 using OS 9 and the Speedometer 4.02 application developed by Scott Berfield.
Speedometer is a compilation of mathematical and graphical algorithms intended to
fully exercise the CPU and graphical processors. The numerical values in the column
adjacent to the horizontal bars are the number of iterations of that test that could
be performed in one second. Thus, the longer the bar the better the performance.
The opposite is true for the color tests located in the bottom section. Here, the
number of seconds necessary to perform the test is displayed. Thus, the smaller the
number the better.
Speedometer comparisons - G3 under OS 9 vs G4 under OS 9
A summery of the results
show that with virtually all Speedometer tests the G4 performance improvement reduces
the time to perform the mathematical operation to 60% of that seen with the G3 CPU.
The G3 CPU speed compared with that of the G4 CPU gives a ratio of 350 MHz (G3) divided
by 600 MHz (G4), or 58%. The ratio of the average of all the G3 to G4 benchmark time
measurements is 60%. It can be seen that for most improvements, the CPU clock speed
is the deciding value. In addition, it was noted that the Speedometer results were
virtually identical whether the OS 9 was run as the booted operating system or in
Classic mode within the OS X environment.
The general perception of application speed of operation, file copying, menu pull-down,
windows opening and closing is perceptibly faster than with the original G3. The
feel of the newly minted G4 is of a far more agile computer.
One of the advantages
of installing the G4 upgrade is its ability to run OS X. The supplied OS X, version
10.2, was installed and appeared to operate quite flawlessly.
OS 9 vs OS X Benchmark
Tests - Carbonized Photoshop 7
My real world test consisted of running some Photoshop 7 functions both under OS
9 and OS X. Photoshop 7 is a fully "carbonized" application, which means
it will run native in either the OS 9 or OS X operating systems. This permits a comparison
to be made with the computer running first with the G3 CPU installed (OS 9), then
the G4 CPU (OS 9), and finally with the G4 CPU running OS X. The FastMac supplied
Apple OS X, version 10.2, was installed on the G4 upgraded computer. FastMac recommends
that OS X be installed "after" the installation of the G4 CPU, as Apple
installs special needed G4-associated files when the installer recognizes a G4 CPU.
The installation went quite smoothly and operated with no apparent problems.
Five different timing tests were run with Photoshop 7 using a 16-bit image file of
95.1 MB: (1) Application launch, (2) Opening a 95.1 MB 16-bit image file, (3) Unsharp
mask, (4) Gaussian blur, and (5) Rotate image 90-degrees.
Photoshop 7 speed tests
The comparison results
are displayed in the above bar chart. Duration times in seconds for each Photoshop
test operation are given next to the bars, with the shorter the bar the faster the
time. For ease of comparison, the last column shows each performance measurement
as a percentage of the baseline G3 (100%) specific operation performance time. The
practical results from Photoshop show that the measured improvement going from a
350 MHz G3 to a 600 MHz G4, depending on the specific Photoshop operation, gives
a moderate 12% to 24% time decrease under OS 9. On the other hand, things improve
even further when using OS X, with the performance time decreasing by 33% to 68%,
depending on the specific operation.
The FastMac CPU upgrade module is an easy path for upgrading a G3 CPU to a G4
with a simple, well-documented installation process of CPU exchange. The G4 upgrade
achieves a reasonable and welcome performance increase for a moderate cost. There
were a few issues with the installation, such as the lack of thermal paste and no
integrated jumper block. Still, this is a great time to upgrade your slowpoke G3.
It provides a substantial speed increase, allows you to run OS X, and all without
a significant investment in a new G4 or G5. The FastMac G4 upgrade is an excellent
choice to rejuvenate your old computer at a very nominal cost.
- Fast performance for
- Relatively simple installation
- Excellent speed improvement
with zippy feel
- Let's you run OS X (and
includes OS X CD)
- No integrated jumper
block (individual jumpers must be installed manually)
- No thermal paste supplied
- Moderate speed improvement
with OS 9 in Photoshop tests
- Does not comes with a
printed manual (must be printed from PDF)
4 out of 5 Mice