Supermicro H8DMU+ User Manual download pdf (Page 26)

2-6

H8DMU+ User's Manual

Figure 2-2. Side and Top Views of DDR2 Installation

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.

Note: Notch

should align

with its

receptive point

on the slot

Notch

Release

Tab

Release

Tab

Note the notch in the slot and on the bottom of the DIMM.

These prevent the DIMM from being installed incorrectly.

Support

The H8DMU+ supports single or dual-channel, DDR2-667/533/400 registered ECC

SDRAM.

Both interleaved and non-interleaved memory are supported, so you may populate

any number of DIMM slots (see note on previous page and chart on following

page). The CPU2 DIMM slots can only be accessed when two CPUs are installed

(however, the CPU2 DIMM slots are not required to be populated when two CPUs

are installed).

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. See chart on following page.

Optimizing memory performance

If two processors are installed, it is better to stagger pairs of DIMMs across both

sets of CPU DIMM slots, e.g. ﬁ rst populate CPU1 slots 1A and 1B, then CPU2 slots

1A, and 1B, then the next two CPU1 slots, etc. This balances the load over both

CPUs to optimize performance.

Maximum memory: 64 GB of DDR2-667/533/400 SDRAM - if only one CPU is

installed, maximum supported memory is halved (32 GB).

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Supermicro H8DMU+ User Manual Page 26

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