1. If your server is configured with a 280-watt processor, install a memory module filler or a new memory
module to cover the slot. See “Install a memory module” on page 109.
2. 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 has 16 memory slots and supports:
• Minimum: 8 GB
• Maximum: 2 TB
• Type (depending on the model):
– TruDDR4 2933, single-rank or dual-rank, 8 GB/16 GB/32 GB/64 GB RDIMM
– TruDDR4 3200, dual-rank, 16 GB/32 GB/64 GB RDIMM
– TruDDR4 2933, quad-rank, 128 GB 3DS RDIMM
For a list of supported memory options, see:
https://static.lenovo.com/us/en/serverproven/index.shtml
Follow the below rules when you install or replace a memory module:
• Memory modules in your server must be the same type.
• Memory modules from different vendors are supported.
• Memory modules with different capacities are supported. Install the memory module that has the higher
capacity first.
• Memory modules with different ranks are supported. Install the memory module with the highest rank first.
• Do not mix x4 and x8 DIMMs in the same channel.
• DIMMs of 3200 MHz and 2933 MHz are supported:
– 2933 MHz DIMMs: operate at 2933 MHz for both 1 DIMM per channel and 2 DIMMs per channel
– 3200 MHz DIMMs: operate at 3200 MHz when 1 DIMM per channel, but operate at 2933 MHz when 2
DIMMs per channel
– Mixing of 2933 MHz and 3200 MHz DIMMs are supported in different channels, operating at 2933 MHz.
Note: Operating speed depends on the processor model. If the processor only supports a memory bus
speed of 2666 MHz, all the installed DIMMs operate at 2666 MHz.
• Install a memory module filler if there is no memory module installed in the slot.
Chapter 3. Hardware replacement procedures 107
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