http://docs.info.apple.com/article.html?artnum=120287 This firmware update provides changes for initializing and running your Power Mac G5. It provides some performance improvements for some PCI-X configurations, patches a security hole and improves fan behavior in Open Firmware.

This firmware update provides changes for initializing and running your Power Mac G5. It provides some performance improvements for some PCI-X configurations, patches a security hole and improves fan behavior in Open Firmware.

To upgrade the firmware on your Power Mac G5, follow the instructions below. You can print these instructions so they are available while you upgrade your firmware.

The Power Mac G5 Firmware Updater Version 5.1.4 is installed in Applications/Utilities.

1.Save changes to open files and then quit all applications, if necessary

2.Open the firmware updater.

3.Click Shut Down in the Firmware Update window to turn off your computer. Wait for your computer to shut down, saving changes if necessary.

4.Press and hold in the Power button on the Power Mac G5 until you hear a long tone.

5. Release the Power button when you hear the tone or see the Power button light flashing.

The firmware updater starts automatically. A status bar shows the progress of the update. You may see more than one status bar.

After the update is complete, your system restarts automatically. When a message says your computer's firmware has been successfully updated to version 5.1.4, the update process is finished.

For more information, go to www.apple.com/support