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5-8
AS1041M-T2/1041M-82 User's Manual
Figure 5-3a. Installing DIMM into Slot
To Install: Insert module vertically and press down until it snaps into place. Pay attention to
the bottom notch.
To Remove: Use your thumbs to gently push each release tab outward to free the DIMM from
the slot.
Note: Notch
should align
with its
receptive point
on the slot
Notch
Notch
Release
Tab
Release
Tab
Support
The H8QM8-2+/H8QME-2+ supports single or dual-channel, registered ECC DDR2-
667/533/400 SDRAM.
Both interleaved and non-interleaved memory are supported, so you may populate
any number of DIMM slots (see note on previous page). Populating two adjacent
slots at a time with memory modules of the same size and type will result in inter-
leaved (128-bit) memory, which is faster than non-interleaved (64-bit) memory.
Optimizing memory performance
It is better to spread pairs of DIMMs across all memory banks with a CPU installed
than to fi ll up one CPU memory bank while leaving another empty. For example,
if you were to install eight DIMMs in a quad-CPU confi guration, you should install
two in the CPU1 DIMM slots, two in the CPU2 DIMM slots, two in the CPU3 DIMM
slots and two in the CPU4 DIMM slots rather than four in any two CPU DIMM slots.
If you install four more, install two in the remaining CPU1 DIMM slots and two in
the the remaining CPU2 DIMM slots, etc. This balances the load over all CPUs to
optimize performance. In a dual-CPU confi guration, memory can only be installed
in the banks associated with CPU#1 and CPU#2.
Maximum memory: 32 GB of DDR2-667/533 or 64 GB of DDR2-400 SDRAM. In
a dual-CPU confi guration, maximum memory support is halved.