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.
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.