MegaPro Dual Pentium Pro PCI ISA Motherboard User’s Guide
16
Step 4 Install Memory
System Memory
There are eight 32–bit SIMM sockets in 4 banks. System memory must
be populated one bank at a time. Each bank has two sockets. Bank0
includes U17 and U18. Bank1 includes U13 and U16. Bank2 includes U9
and U12. Bank3 includes U5 and U8. Up to 512 MB of system memory
can be installed on the motherboard. Each bank must be populated with
the same type of SIMM. If a 4 MB SIMM is installed in the first socket
in Bank0, then the same type of 4 MB SIMM must be installed in the
second Bank0 SIMM socket. The minimum amount of system memory
supported by the MegaPro PCI is 8 MB. Each socket can hold one
SIMM. Use:
•
1 MB x 32 or 36,
•
2 MB x 32 or 36,
•
4 MB x 32 or 36,
•
8 MB x 32 or 36, or
•
16 MB x 32 or 36 SIMMs.
Fast Page Mode, EDO, and Burst EDO SIMMs cannot be mixed. The
motherboard supports SIMMs operating at 50 or 60 ns RAS access
time.
Warning
Do not use 16 MB x 36 64 MB SIMMs that have 36 chips per SIMM.
This type of 16 MB SIMM does not work reliably because of
excessive loading on the motherboard circuitry. If you must use 64
MB SIMMs, use only SIMMs that have 12 or 8 chips per SIMM.
See the list of approved SIMMs.
Do not use 70 ns SIMMs. The system memory timing cycle on this
motherboard are very sensitive. This motherboard does not work
reliably with 70 ns SIMMs.
Memory Display
System memory is reported by AMIBIOS as it boots and again when the
AMIBIOS System Configuration Screen is displayed just before the
operating system boots. The memory displayed by AMIBIOS on the
System Configuration Screen is 384 KB less than the total memory
installed.
Cont’d
