Oracle X7-8, Service Manual

Page: 185 / 308

Install a Processor
Related Information
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“DIMM and Processor Physical Layout” on page 183
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“DIMM Population Scenarios” on page 184
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“DIMM Population Rules” on page 185
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“DIMM Operating Speeds” on page 188
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“DIMM Rank Classification Labels” on page 188
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“Inconsistencies Between DIMM Fault Indicators and the BIOS Isolation of Faulty
DIMMs” on page 188
DIMM Population Rules
The population rules for adding DIMMs to the server are as follows:
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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).
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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.
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Within a memory channel, DIMMs must be populated in the black sockets first, and then in
the white sockets.
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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.
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The server will operate properly with a minimum of one DIMM installed per processor.
The following illustration shows the location of the memory buffers, the groups of DIMM slots,
and the slots assigned to each channel.
Servicing Components 185