Apple iMac G3 (Original) User Manual download pdf (Page 5)

To increase the memory to the maximum of 256 MB, install a 128 MB DIMM in the

user-accessible upper expansion slot. Have a 128 MB DIMM installed in the lower slot. To

maintain your Apple warranty, the DIMM in the lower slot must be installed or removed by an

Apple-authorized service provider.

For more information about the type of SO-DIMMs you must use, see the technical

speciﬁcations in your online information, About Your iMac, available via the Help Center in the

Help menu.

Video Memory Configurations

Your computer comes with a total of 6 MB of Synchronous Graphic RAM (SGRAM) video

memory; 2 MB are built into the logic board and 4 MB are in the video memory slot.

About the Backup Battery

If you have intermittent problems starting up your computer and the date is reset, you need to

replace the lithium backup battery in the computer. Replacing the battery may cause some

settings on your computer, such as the desktop patterns, to revert to the factory default

settings. You may also have to restore modem settings in any communication programs you

are using.

Installing Memory or Replacing the Battery

Follow these instructions to install additional memory or replace the backup battery.

Installing additional memory and replacing the backup battery involves four procedures:

m Tu r ning off the computer

m Opening the computer

m Inserting the memory module into a speciﬁc slot or replacing the battery

m Closing the computer

Important This computer uses Synchronous Dynamic Random-Access Memory (SDRAM)

SO-DIMMs. DIMMs from older Macintosh computers are not compatible with your computer

and should not be used even though they may ﬁt into the RAM DIMM slots.

Important Make a note of the settings before you replace the battery.

Important Before installing any of these items, carefully read “About Memory” on page 4 and

“About the Backup Battery,” above.

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Apple iMac G3 (Original) User Manual Page 5