The PowerForce G3 ZIF (Zero Insertion
Force) is the super-fast, yet economical CPU upgrade for your "Beige" Power
Mac G3, Blue and White G3's, "G3 All-in-One" education
model, and the PowerMac G4 "PCI" (also known as
the "Yikes" motherboard G4.) The PowerForce G3 ZIF
uses IBM’s new PowerPC 750GX processor and operates
up to 1.1 GHz.
PowerLogix opted for the IBM PowerPC 750GX for these upgrades,
instead of the Motorola G4s, due to a bug we discovered
in 2001 (not even Motorola knew about this bug..it even
existed in their evaluation boards.) The 745x chip is incompatible
with the Motorola bridge chip used on these motherboards.
The bug can be worked around, but it requires significant
extra circuitry, raising the cost of the product. For these
older machines, we did not feel that this extra cost was
justified. This extra circuitry creates a performance penalty
-- slowing the system bus
from 100 MHz to 66 MHz. On the other hand, the PowerLogix G3 ZIF will
the native G3 bus speed of 100 MHz.
Although this ZIF model is a G3, make no mistake; it is
a very fast performer. Remember, the only difference between
a G3 and a G4 is Altivec. Altivec is a specialized vector
processor and only a small number of specific software tasks
in some applications actually utilize it. The majority of
mainstream applications do not take advantage of Altivec.
Even the Darwin kernel, at the heart of Mac OS X, is not
optimized to use Altivec.
Unless you are using Altivec constantly, it is better to
have a CPU that runs all tasks faster all the time, than
a CPU that runs slower all the time, except for a few Altivec
In most real world tests, a G3 1.1Ghz ZIF upgrade outperformed a similarly
priced G4 500 card by nearly 2:1. The PowerForce G3 ZIF offers the highest
ratio of performance vs. price of any product available for the G3.
If you already have a large investment in your Power Mac
G3, it makes economic sense to upgrade the processor rather
than opting for G4 or G5 systems from Apple. With the removal
of ADB, serial, and SCSI connections, Apple has eliminated
all of the legacy ports on newer models. So you can keep
your investment in peripherals as well.
We offer two speeds, 1.0 GHz and 1.1 GHz. Both use the IBM
750GX processor with 1.0 MB of L2 cache running at
Fully compatibility with all Macintosh applications in
both OS 9 and OS X, the PowerForce G3 ZIF installs easily
in a few minutes with a flathead screwdriver. We’re
confident you’ll find the PowerForce G3 one of the
best computing investments you’ve ever made. If you’re
not fully satisfied, return the processor in 30 days for
a full refund. Available today from our authorized dealers
or online store!
Order Now at the PowerLogix Factory Store:
G3 Blue and White