Supero AS-4041M-32RPlus User Manual page 40

AS4041M-32R+ User's Manual
Support
The H8QM3-2 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 (slots 1A and 1B) , 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 in the next two CPU1 DIMM
slots (2A and 2B) and the next two CPU2 DIMM slots, etc. This balances the load
over all CPUs to optimize performance. In a single or dual-CPU confi guration,
memory can only be installed in the banks associated with CPU#1 or CPU#1 and
CPU#2, respectively.
Maximum memory: 128 GB of DDR2-667/533/400. (Dual-CPU confi guration: 64
GB maximum, single-CPU confi guration: 32 GB maximum.)
To Install:
Insert module vertically
and press down until it
snaps into place. The
release tabs should
close - if they do not
you should close them
yourself.
To Remove:
Use your thumbs to
gently push each re-
lease tab outward to
release the DIMM from
the slot.
Figure 5-4. Installing DIMM into Slot
Notch
Release
Note: Notch
Tab
should align
with its
receptive point
on the slot
Note the notch in the slot and on the bottom of the DIMM.
These prevent the DIMM from being installed incorrectly.
5-8
Notch
Release
Tab