OWC's Support

Installing your new OWC Mercury G3 or G4 ZIF in the Blue & White G3 or G4 "Yikes" Power Macintosh system
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Jumper Setting Configuration

A: Stock jumper block

The red block (may be a different color on your computer) (Fig.4, Arrow A) is where you configure the pins with jumpers on your G3 motherboard to take advantage of the new OWC Mercury ZIF chip. The red jumper block is Apple's way of setting a configuration for a certain speed.
Fig 5. shows jumper configurations. Black = Jumper / White = No Jumper

Tip: A needle nose pliers, tweezers or hemostats work really well for placing the jumpers on the logic board pins.

For more configurations go to the
Complete Jumper Chart.

STEP 3: Take the jumper block off and keep it in a safe place. You never know when you might need it again. After the block is off the pins will be exposed. Grab as many jumpers as it will take to set your Mac at the speed you want. Use at your own risk:

STEP 4: If you are looking to squeeze top performance out of your new OWC Mercury ZIF chip, you can attempt to clock your CPU even higher than the rated speed of the ZIF chip. Follow Fig. 5 or follow the complete jumper chart for even more configurations.

STEP 5: Start up your system and install cache controlling software. If you're running Mac OS 9, we recommend using PowerLogix Cache Control software located here, and if you're using Mac OS X, we recommend Ryan Rempel's Cache Control Software located here, or you can also use PowerLogix universal CPUDirector software, located here.

STEP 6: Congratulations! After you have completed configuring the jumpers and checked to see if your computer runs stable, you can close the case, plug what you have back in and enjoy your new Mac!