Supermicro AS-1040C-8, User Manual

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5-8
AS1040C-T/1040C-8 User's Manual
5-6 Installing Memory
CAUTION
Exercise extreme care when installing or removing memory modules
to prevent any possible damage.
1. Insert each memory module vertically into its slot, beginning with CPU1 slot 1A,
then 1B, etc.. Pay attention to the notch along the bottom of the module to prevent
inserting the module incorrectly (see Figure 5-4). See support information below.
2. Gently press down on the memory module until it snaps into place.
Note: each processor has its own built-in memory controller. 128 MB, 256 MB,
512 MB, 1 GB, 2 GB and 4 GB memory modules are supported.
Support
The H8QCE+/H8QC8+ supports single or dual-channel, registered ECC
DDR400/333/266 SDRAM.
Both interleaved and non-interleaved memory are supported, so you may populate
any number of DIMM slots.
Populating two adjacent slots at a time with memory modules of the same size and
type will result in interleaved (128-bit) memory, which is faster than non-interleaved
(64-bit) memory.
Optimizing memory performance
With the mandatory four processors installed, it is better to spread out pairs of
DIMMs across all four CPU memory banks than fi lling up one CPU memory bank
while leaving another empty. For example, if you were to install eight DIMMs you
should install two in the CPU1 DIMM slots, two in the CPU2 DIMM slots, two in
the CPU3 DIMM lots 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.
Maximum memory : 64 GB for DDR266 and 32 GB for DDR400/333.