Oracle^® Server X8-2L Service Manual

DIMM Population Rules

The population rules for adding DIMMs to the server are as follows:

• The server supports 64-GB quad-rank (QR) Load-Reduced DIMMs (LRDIMMs) and 32-GB dual-rank (DR) and 16-GB DR Registered DIMMs (RDIMMs).

• Do not mix DIMM types in the server. For example, do not mix 64-GB LRDIMMs and 16-GB or 32-GB RDIMMs in the same server. If the server has 64-GB LRDIMMs installed, you cannot install 16-GB or 32-GB RDIMMs and vice versa.

• If you are installing a mix of RDIMM sizes (for example, 16-GB and 32-GB), install the larger size RDIMMs first, then the smaller RDIMMs, until all of the RDIMMs are installed.

• Each memory channel is composed of a black slot (channel slot 0) and a white slot (channel slot 1). Populate the black slot first, and then populate the white slot.

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  Note -  The black slot for each channel must be populated first because it is considered furthest away from the processor.

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• The server supports either one DIMM per channel (1DPC) or two DIMMs per channel (2DPC).

• The server operates properly with a minimum of one DIMM installed per processor.

• The server does not support lockstep memory mode, which is also known as double device data correction, or Extended ECC.

• Mixing of single-rank and dual-rank DIMMs in Oracle Server X8-2L is not supported.