Lenovo ThinkSystem SR850 V2

System Board (Motherboard) – Part Number: 03GY151

The Lenovo ThinkSystem SR850 V2 Quad-Socket System Board (03GY151) is the primary baseboard for the SR850 V2 platform. It is designed for mission-critical, high-density computing in a flexible 2U chassis, supporting a dual-socket configuration onboard with expansion capability to four sockets via a processor and memory expansion tray.

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Socket Information

• Socket Type: Intel LGA 4189 (FCLGA4189)

• Onboard Configuration: 2 CPU sockets

• Maximum Configuration: 4 CPU sockets (with Processor & Memory Expansion Tray)

The LGA4189 socket supports 3rd Generation Intel Xeon Scalable processors (Cooper Lake architecture).

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Processor Support

• Processor Family: 3rd Gen Intel Xeon Scalable (Gold & Platinum tiers)

• Max Cores per CPU: Up to 28 cores / 56 threads

• Maximum Configuration:

  • 4 CPUs

  • Up to 112 cores / 224 threads total

• Max Frequency: Up to 3.9 GHz (depending on SKU)

• Maximum TDP: Up to 250W per processor

• Interconnect:

  • 6x Intel Ultra Path Interconnect (UPI) links per CPU

  • 10.4 GT/s

  • Mesh topology across all four sockets

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Memory Specifications

• Memory Channels: 6 channels per processor

• DIMM Slots:

  • 24 DIMM slots onboard

  • Expandable to 48 DIMM slots total (with expansion tray)

• Memory Type: Lenovo TruDDR4 RDIMM and 3DS RDIMM

• Speed: Up to 3200 MHz

Capacity

• Onboard (24 slots): Up to 6TB using 256GB 3DS RDIMMs

• Fully Expanded (48 slots): Up to 12TB system memory

• Persistent Memory Support: Intel Optane Persistent Memory 200 Series

Maximum Combined Capacity (Quad-Socket Mode):
Up to 18TB total using a mix of:

• 24x 512GB Persistent Memory modules

• 24x 256GB 3DS RDIMMs

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Expansion & I/O

PCIe

• 2x Onboard PCIe 3.0 x8 low-profile slots (Slot 7 & Slot 8)

• Multiple riser card options for additional expansion

• Dedicated OCP 3.0 SFF slot (PCIe 3.0 x16 host interface)

Storage Connectivity

• 8x onboard SATA ports (Intel VROC software RAID support)

• Up to 16x onboard NVMe ports (Intel VROC supported)

Rear I/O Ports

• 2x USB 3.1

• 1x Serial

• 1x VGA

• 1x 1GbE dedicated management port

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Management & Security

• Management Controller: Lenovo XClarity Controller (XCC)

• Security: Integrated TPM 2.0 module

• RAID Support:

  • Intel VROC (software RAID)

  • Compatible with ThinkSystem PCIe RAID & HBA adapters

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Summary

The Lenovo ThinkSystem SR850 V2 system board (03GY151) features Intel LGA 4189 (FCLGA4189) sockets, supporting dual CPUs onboard and expandable to quad-socket configurations. Designed for mission-critical workloads, it delivers:

• Up to 112 cores

• Up to 18TB combined memory

• 250W CPU support

• High-speed UPI mesh interconnect

• Extensive NVMe and PCIe expansion

This makes it ideal for enterprise databases, virtualization clusters, SAP HANA, and large-scale in-memory computing environments.