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Your computer already comes with 8 MB soldered on your computer’s main
logic board plus 8 MB installed in one of the DIMM slots, for a total of
16 MB of DRAM. One DIMM slot remains for installing an additional 8-MB,
16-MB, 32-MB, or 64-MB DIMM, for a total of 24 MB, 32 MB, 48 MB, or
80 MB of DRAM respectively. (If you want to install the maximum amount
of memory, you need to replace the 8-MB DIMM already installed in one of
the DIMM slots with a 64-MB DIMM, and then install a 64-MB DIMM in
the remaining slot, for a total of 136 MB of DRAM.)
IMPORTANT
The DIMMs should be 64-bit wide, 168-pin fast-paged mode,
with 70-nanosecond (ns) RAM access time or faster and a 1K or 2K refresh
count. The Single Inline Memory Modules (SIMMs) from older Macintosh
computers are not compatible with your computer and should not be used.
DIMMs that support a 4K refresh count also should not be used.
If you decide to have additional DRAM installed in your computer, the
DIMMs can be installed one at a time in any order in either of the
memory slots.
Instructions for installing DIMMs are in the section “Installing DIMMs or a
High Performance Module” later in this chapter.
High Performance Module configurations
A High Performance Module (256K level 2 cache) provides an overall
increase in your computer’s performance. Although the computer’s processor
speed stays the same when you install a High Performance Module (see your
Technical Information booklet for the exact speed), your computer performs
tasks significantly faster. You install a High Performance Module on the main
logic board of your computer.
Instructions for installing a High Performance Module are in the section
“Installing DIMMs or a High Performance Module” later in this chapter.
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Installing Expansion Cards or Additional Memory