Installing the Presto PPC – Quadra 605, LC, and
Performa 470 Series
Note: European LC 475 Owners
Some European LC 475 machines require a replacement power supply in order to reliably use the
Presto PPC. To check your power supply:
1. Remove the power cord and the case cover.
2. Locate the power supply on the right hand side of the machine.
3. A specifications label should be visible on its top. The output for the unit at +5V (volts)
should be 3.75A (amps) or greater.
If your power supply needs to be upgraded, contact an Apple service provider for a replacement.
Once you have replaced the power supply, or have verified that it is the correct model, you may
proceed with the installation.
1. The Presto PPC installs into the motherboard's CPU socket. For this reason, the Macintosh’s
original 68040 CPU must be removed using the CPU remover tool (CRT) packaged with the
Presto PPC card.
2. Locate the 68040 CPU in the center portion of the machine.
3. Locate the PDS slot. If there is a PDS card already installed, remove it.
4. Insert the CRT between the 68040 CPU and the CPU socket. Lift the CPU out of the socket
by slowly moving around the perimeter of the chip while gently pushing downward.
Carefully remove the CPU from the socket, making sure not to bend any of the pins on the
bottom of the chip and set it aside. You will install it onto the Presto PPC card in a later step.
5. Remove the Presto PPC processor upgrade card from the anti-static package, making sure to
handle the card by the edges.
Presto PPC Installation Instructions
2
68040 CPU
CPU Remover Tool
Socket
