Installation guide

3-16
ESCALA T610 and PL 600T Installation Guide
System Memory Options
System memory is pluggable in reserved slots on memory riser cards. Several sizes of dual
inline memory modules (DIMMs) can be used to increase system memory.
Two slots are available for system memory riser cards, and both slots are located for easy
access in the system unit. Systems that contain a processor card that has a single
processor, also known as a one–way processor card, can have memory DIMMs installed on
the processor card, or on a memory riser card if present.
Each of the empty memory card slots must have a memory filler card installed.
To upgrade your system memory, you can:
• Install additional DIMMs
• Install an additional populated memory card
• Replace existing DIMMs with DIMMs of a larger size
Memory Placement with a One–Way Processor Card
• Each memory pair must contain two DIMMs of equal memory size.
• Pair memory size may be mixed on the one–way processor card.
• The minimum memory is one pair of DIMMs in slots 1 and 8. This is labeled pair A in the
following figure:
(8) A
(7) B
(6) C
(5) D
(3) C
(4) D
(2) B
(1) A
• The maximum memory is four DIMM pairs in slots 1 through 8. These are pairs A, B, C,
and D. DIMM pairs must be installed in order beginning with pair A and then progressing
to B, C, and D.
• To increase memory on a one–way processor card, add more DIMM pairs or replace the
DIMMs pair with ones having a higher value.
• If a memory card is installed in the system with a one–way processor card:
– Memory DIMMs must be moved from the one–way processor card to the memory
card.
– The memory card must then have a minimum of four DIMMS. (See ”Memory
Placement for a Memory Card” on page 3-17.)