Processor
Supports eight Intel Xeon processors up to 350W TDP, with integrated memory controller and Intel Mesh UPI (Ultra 
Path Interconnect) topology. 
•  Designed for LGA 4677 sockets
•  Scalable up to 60 cores
•  Supports 4 UPI links per processor supporting 12.8 GT/s, 14.4 GT/s and 16 GT/s speeds
For a list of supported processors, see: 
https://serverproven.lenovo.com.
Memory
See “Memory module installation rules and order” in User Guide or Hardware Maintenance Guide for detailed 
information about memory configuration and setup.
•  128 dual inline memory module (DIMM) slots
•  Memory module type: 
–  10x4 RDIMM: 32 GB or 64GB 
–  3DS RDIMM: 128 GB or 256 GB
•  Speed: 
Note: Operating speed depends on processor model and UEFI settings.
–  4800 MT/s for 1 DIMM per channel
–  4400 MT/s for 2 DIMMs per channel
•  Minimum memory: 256 GB
•  Maximum memory: 32 TB
For a list of supported memory modules, see 
https://serverproven.lenovo.com.
Internal drives
The server supports up to two internal 960 GB NVMe M.2 drives with 80 mm (2280) form factor.
For a list of supported M.2 drives, see: 
https://serverproven.lenovo.com.
Storage expansion
Up to sixteen 2.5-inch or E3.S drives 
For a list of supported drives, see: 
https://serverproven.lenovo.com.
Expansion slots
•  Six front PCIe slots
•  Up to eight rear PCIe slots
•  One OCP module slot (optional)
•  One rear Ethernet slot (optional)
Note: PCIe slot availability is based on riser card selection.
4 ThinkSystem SR950 V3 System Configuration Guide