NOTES: The only 32-MB SDRAM
DIMMs validated for use in this computer are the
following:
- Samsung KMM366S403AT1-G2
- Hitachi HB526A464EN-10
- Samsung KMM366S403AT-G2
- Toshiba THMY644021AEG-12A
The system may not recognize other 32-MB
SDRAM DIMMs and may fail POST.
When the system memory size is increased above 64 MB in a system with the
Intel� Pentium� VX chip set, the
system slows down. The problem is the cache
limits of the chip set. The second-level (L2)
cache can store (cache) memory only for accesses
made in the lower 64 MB of main memory due to the
size of the cache tag. If more than 64 MB is
installed in the system, any memory access to
data above the 64 MB is not cached. The system
runs cacheless for memory accesses. The
Microsoft� Windows� operating system uses pages
of memory throughout the entire memory space so
some accesses fall above the 64-MB region, which
causes a decrease in performance. In effect,
instead of getting a performance gain for adding
more memory to a base 64-MB system, in many
instances the performance is slower.
Additionally,
many games that use MS-DOS� extenders are loaded
at the top of the memory space so all accesses to
the code are cacheless.
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