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VRAM configurations
VRAM, like standard DRAM, is also provided in DIMMs. Your server comes
with 2 MB of VRAM installed in two 1 MB DIMMs. (These DIMMs are
installed in bank 1.) Your server’s VRAM can be expanded to a maximum of
4 MB by adding two 1 MB DIMMs to bank 2. 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.
Cache configurations
Your server has a 512K L2 cache. You can upgrade the L2 cache to a
maximum of 4 MB by replacing the existing 512K cache DIMM with a
higher-capacity cache DIMM.
Adding DRAM
If you decide to have additional DRAM installed in your server, the DIMMs
can be installed one at a time in any order in any of the memory slots.
However, if you wish to take advantage of your server’s memory interleaving
capability, which provides maximum performance, you must have the DIMMs
installed in pairs and in paired slots. (A1 and B1 are the first pair of slots,
A2 and B2 are the second, and so on.) Memory interleaving allows the server
to read or write to its memory at the same time that other memory reads or
writes are occurring, thus providing faster performance.
Specifications 91