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3 System upgrade

Memory module installation guidelines

The following rules apply when installing fully-buffered memory modules to the server:

The system must have a minimum of one 512 MB FBDIMMs installed. When installing additional memory, refer to the tables on “Memory module population order” on page 69 for proper population order.

Use only DDR2 FBDIMMs. Other DIMMs will not fit into the socket. Attempts to force a non-DDR2 FBDIMM into a socket will damage or the slot or the FBDIMM.

Hold FBDIMMs only by the edges. Do not touch the components or gold edge connectors.

Install FBDIMMs with gold-plated edge connectors only.

Memory module population guidelines

The following configuration rules must be observed when populating memory modules:

In a minimum memory configuration, the FBDIMM should be installed in DIMM A1 slot.

Install FBDIMM pairs in the following order:

Channel A: DIMM slots A1 and A2

Channel B: DIMM slots B1 and B2

Channel C: DIMM slots C1 and C2

Channel D: DIMM slots D1 and D2

FBDIMMs within a given channel must be identical with respect to size, speed, and organization.

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Acer Altos R520 manual Memory module installation guidelines, Memory module population guidelines