Apple Power Macintosh 8500/120 Series - Manual (Page 75)

Memory for your computer is provided in packages called Dual Inline
Memory Modules (DIMMs). Adding dynamic random-access memory
(DRAM) DIMMs increases your computer’s memory. The DIMMs must be
the correct type for your computer, and can be installed one-at-a-time. For
best performance, however, the DIMMs should be installed in pairs of the
same size into paired slots in your computer. Installing a cache DIMM can
also increase your computer’s performance. The memory used to display
images on the screen (called video RAM, or VRAM) can also be expanded
by installing DIMMs.
It is very important that the DIMMs be correctly installed in your Power
Macintosh, because incorrect installation can result in errors, unpredictable
results, and damage to your equipment and data.
Installing internal drives
Your Macintosh can hold up to four internal storage devices. Possible
configurations could include a floppy disk drive, a CD-ROM drive, and two
hard disk drives (several capacities are available) or a CD-ROM drive, a
floppy disk drive, a removable cartridge drive, and a digital audiotape (DAT)
drive. Depending on the configuration you purchased, these drives may
already be installed. If you want to add an internal drive to your Macintosh,
see your Apple-authorized dealer. For more information about internal drives,
see the Technical Information booklet that came with your Macintosh.
WARNING To avoid damage to your computer, Apple recommends that
only an Apple-certified technician install additional DIMMs. Consult
the service and support information that came with your computer for
instructions on how to contact an Apple-authorized service provider or
Apple for service. If you attempt to install additional DIMMs yourself,
any damage you may cause to your equipment will not be covered by
the limited warranty on your computer. See an Apple-authorized dealer
or service provider for additional information about this or any other
warranty question.
63 Connecting Additional Equipment