Lenovo ThinkSystem SR550, Maintenance Manual

Page: 134 / 206

Figure 99. Memory module removal
Step 1. Carefully open the retaining clips on each end of the memory module slot.
Attention:
To avoid breaking the retaining clips or damaging the memory module slots, handle the
clips gently.
Step 2. Grasp the memory module at both ends and carefully lift it up to remove it from the slot.
If you are instructed to return the old memory module, follow all packaging instructions and use any
packaging materials that are provided.
Memory module installation rules
Memory modules must be installed in a specific order based on the memory configuration that you
implement on your server.
Your server supports up to 6 memory modules when one processor is installed, and up to 12 memory
modules when two processors are installed. The following memory configurations are supported, depending
on the processors installed:
• For Intel Xeon SP Gen 1:
– Minimum: 8 GB (only one processor installed and only one 8 GB RDIMM installed in the CPU1 DIMM3
slot)
– Maximum:
– 384 GB using RDIMMs (two processors installed and one 32 GB RDIMM installed in each of the 12
memory module slots)
– 768 GB using LRDIMMs (two processors installed and one 64 GB LRDIMM installed in each of the
12 memory module slots)
– Type:
– TruDDR4 2666, single-rank or dual-rank, 8 GB/16 GB/32 GB RDIMMs with Error Checking and
Correcting (ECC) technology
– TruDDR4 2666, quad-rank, 64 GB LRDIMMs with ECC technology
126
ThinkSystem SR550 Maintenance Manual