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VRAM configurations
Video RAM (VRAM), like standard DRAM, is also provided in DIMMs.
Your computer comes with 2 MB of VRAM installed in two 1 MB DIMMs.
(These DIMMs are installed in the two bank 1 slots.) Your computer’s VRAM
can be expanded to a maximum of 4 MB by adding two 1 MB DIMMs to the
two bank 2 slots. Both DIMMs must be added at the same time.
IMPORTANT
The VRAM DIMMs must be 32-bit wide, 112-pin fast-paged
mode with 70-ns RAM access time or faster. Do not use the 256K or 512K
VRAM SIMMs used in older Macintosh computers.
Note: If you install additional VRAM and later remove it, make sure to leave
the remaining 2 MB of VRAM installed in the bank 1 slots. You will not be
able to use a TV as a monitor if the VRAM is installed in the bank 2 slots.
For more information about using a TV as a monitor, see Chapter 7,
“Connecting Additional Equipment.”
Cache configurations
Your computer comes with a cache module already installed. To find out the
exact size of the included cache module, see the “Memory” section in your
Te ch n i ca l In fo r m a t i o n booklet.
You can replace the existing cache module with a larger one. Cache modules
are currently available from third-party manufacturers in various sizes up to
1MB. However, Apple recommends that you use an Apple-brand cache
module if you want to upgrade your existing cache.
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Installing PCI Expansion Cards and Additional Memory