Technical Data
34
P5000HX(-M)-WMB Series Motherboard
Service Manual
Overview
The P5000HX(-M)-WMB supports up to 128MB of on-board dynamic RAM modules
in FPM or EDO, x36 or x32.
Note:
ECC or Parity modes are supported only with x36 modules.
Memory Bank
The P5000HX(-M)-WMB contains four (4) 72-pin low-profile SIMM sockets for
DRAM memory modules (
Figure 13
). These four sockets comprise two (2) memory
banks, each consisting of two sockets and providing a 32-bit wide data path and 8 parity
bits (x36 SIMM's only):
•
Sockets 1 and 2 comprise Bank 0
•
Sockets 3 and 4 comprise Bank 1
Each bank must be completely filled to be operable. Also, both sockets in a bank must
be filled with SIMM's of identical size. For example, if an 16 MB SIMM is installed in
Socket 1, another 16 MB SIMM must be installed in Socket 2.
SIMM Types
Four SIMM memory sizes (4, 8, 16, and 32 MB) are supported. SIMM's of these sizes
can be installed in sockets 1, 2, 3, or 4 in combinations as illustrated in
Figure 14
.
Memory size is detected by the system BIOS. Memory timing requires 70 ns or faster
page devices. Parity generation and checking is provided for each byte.
Installing Memory Modules
The SIMM sockets are gold and require gold SIMM's. Use of tin/lead SIMM's
can cause damage to the equipment and could void the warranty.
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