Lenovo 7D75 System Configuration Manual page 12

Memory
• Slots: 32 dual inline memory module (DIMM) connectors that support up to 32 TruDDR5 DIMMs
• Memory module type:
– TruDDR5 4800 MHz RDIMM: 16 GB (1Rx8), 32 GB (2Rx8)
– TruDDR5 4800 MHz 10x4 RDIMM: 32 GB (1Rx4), 64 GB (2Rx4)
– TruDDR5 4800 MHz 9x4 RDIMM: 32 GB (1Rx4), 64 GB (2Rx4)
– TruDDR5 4800 MHz 3DS RDIMM: 128 GB (4Rx4), 256 GB (8Rx4)
• Speed: 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: 16 GB
• Maximum memory: 8 TB: 32 x 256 GB 3DS RDIMMs
For a list of supported memory modules, see
Internal drives
• Front drive bays:
– Up to 24 x 2.5-inch hot-swap SAS/SATA/NVMe drives
– Up to 12 x 3.5-inch hot-swap SAS/SATA drives
– Up to 4 x 3.5-inch hot-swap NVMe drives
• Middle drive bays:
– Up to 8 x 2.5-inch hot-swap SAS/SATA/NVMe drives
– Up to 4 x 3.5-inch hot-swap SAS/SATA drives
• Rear drive bays:
– Up to 8 x 2.5-inch hot-swap SAS/SATA drives
– Up to 4 x 3.5-inch hot-swap SAS/SATA drives
– Up to two 7mm drives
• Up to two internal M.2 drives
Expansion slots
• Up to ten PCIe slots in the rear and two PCIe slots in the front
• One OCP module slot
PCIe slot availability is based on riser selection and rear drive bay selection. See
slots and PCIe adapters" in User Guide or Hardware Maintenance Guide.
ThinkSystem SR650 V3 System Configuration Guide
4
https://serverproven.lenovo.com
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"Rear view" on page 25 and "PCIe