G3 Upgrade


If you've done a Takky Upgrade you are probably a person who is addicted to speed in the Color Classic. But what could be done to get more speed than a conventional Takky Upgrade? The Takky Upgrade is a good Basement to do more(if you've chosen a 5400/6400 or 5500/6500 logic board).

The Macs that we use as a donor are not designed to do CPU upgrades, but some clever engineers found out, that the L2 cache slot could be equipped with a CPU Upgrade. This knowledge enables some companies to enter the market with G3 L2 CPU upgrade cards in the late nineties. Watch out for the difference of the clock speed - it could be different from the 5400/6400 to the 5500/6500 boards because of the different busspeeds.

As an overview, here is a list of all known G3 L2 upgrade cards:
Manufacturer CPU Speed
on 5400/ 6400
CPU Speed
on 5500/ 6500
Cache Size Cache Speed
metabox joeCARD T 320 MHz 320 MHz 1 MB 160 MHz
300 MHz 300 MHz 512 KB 150 MHz
260 MHz 260 MHz 512 KB 130 MHz
Newer Tech
MAXpower G3-L2
400 MHz 400 MHz 1 MB 200 MHz
300 MHz 300 MHz 512 KB 150 MHz
300 MHz 300 MHz 1 MB 160 MHz
Phase 5
Maccelerate!750TA
300 MHz 300 MHz 1 MB 150 MHz
PowerLogix 400 MHz 400 MHz 1 MB 160 MHz
320 MHz 320 MHz 1 MB 160 MHz
240 MHz 240 MHz 512 KB 120 MHz
Sonnet Technologies
Crescendo/L2 G3
- 500 MHz 1 MB 250 MHz
400 MHz 400 MHz 1 MB 200 MHz
400 MHz 400 MHz 512 KB 133 MHz
320 MHz 350 MHz 1 MB 175 MHz
320 MHz 350 MHz 512 KB 175 MHz
300 MHz 300 MHz 1MB 150 MHz
300 MHz 300 MHz 512 KB 150 MHz
250 MHz 240 MHz 512 KB 125 MHz
Vimage
VPower PF
325 MHz 320 MHz 512 KB 120 MHz
240 MHz 225 MHz 1 MB 160 MHz
L2 Cache Slot G3 Upgrade
L2 Cache Slot on a 5500/6500 Board for G3 Upgrade Card.
Sonnet Crescendo G3 L2 for Color Classic Takky
An Example: A Sonnet Crescendo G3 L2
All in the past available cards are discontinued and you have to look for them on eBay or other sources. The prices raising higher and higher and with good luck you find a complete donor Mac on eBay wich have a card installed. So let me say - if you find such a card for a good price: buy it! ;-)

Plastic Works

Color Classic G3 Card donĀ“t fit
All the CPU Cards are higher than the plastics in the case give space.
Color Classic G3 card plastic cutout
The image shows you that you have to cut out a plastic inlay. Be careful: there is a small clip which holds the floppy drive in place. Please don't cut out too much.
Color Classic G3 Card Floppy Plastics Cutout
You have to cut out a small piece of the floppy drive holder too.
Color Classic G3 Card Slide In
When you cut out the described plastics, the logic board slides in perfectly with the G3 card installed.

Other things to do

Finish!

Color Classic Sonnet Crescendo G3 L2 500 Metronome
Color Classic Sonnet Crescendo G3 L2 500 System Profiler
If you built everything correct and installed the drivers of you card(sonnet drivers are available in the downloads section) you can enjoy the speed of a G3 CPU in your Apple Color Classic.