Lenovo ThinkSystem SR645 V3 User Manual page 14

Memory
See "Memory module installation rules and order" on page 39
setup.
• Slots: 24 dual inline memory module (DIMM) connectors that support up to:
– 24 RDIMMs
• Memory module types:
– TruDDR5 RDIMM: 16 GB (1Rx8), 32 GB (2Rx8), 64 GB (2Rx4 10x4)
• Speed: Operating speed depends on processor model and UEFI settings.
– Maximum speed: 4800 MT/s
• Minimum memory: 16 GB
• Maximum memory:
– RDIMM: 1.5 TB: 24 x 64GB RDIMMs
For a list of supported memory options, see
Internal drives
Front:
• Up to eight 2.5-inch hot-swap SAS/SATA drives
• Up to ten 2.5-inch hot-swap AnyBay (SAS/SATA/NVMe) drives
Inside:
• Up to two internal SATA M.2 drives
Expansion slots
Depending on the model, your server supports up to three PCIe slots in the rear.
• PCIe x16, low-profile
• PCIe x16/x16, low-profile + low-profile
• PCIe x16/x16, low profile + full-height
Integrated functions and I/O connectors
• Lenovo XClarity Controller (XCC), which provides service processor control and monitoring functions, video
controller, and remote keyboard, video, mouse, and remote drive capabilities.
– The server supports Lenovo XClarity Controller 2 (XCC2). For additional information about Lenovo XClarity
Controller 2 (XCC2), refer to
• One XCC system management port on the rear to connect to a systems-management network. This RJ-
45connector is dedicated to the Lenovo XClarity Controller functions and runs at 1 GB speed.
• A group of two or four Ethernet connectors on OCP 3.0 module
• Up to four USB 3.2 Gen1 (5 Gbps) ports:
– Three on the rear of the server
– One on the front of the server
• One USB 2.0 port on the front of the server
• Up to two VGA connectors
– One on the rear of the server
– (Optional) One on the front of the server
Note: Available when the front I/O module is installed in the server.
Network
OCP 3.0 module on the rear of the server
ThinkSystem SR645 V3 User Guide
4
https://static.lenovo.com/us/en/serverproven/index.shtml
https://sysmgt.lenovofiles.com/help/topic/lxcc_frontend/lxcc_overview.html
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for detailed information about memory configuration and
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