Lenovo 4XG7A37981 Thinksystem SR550/SR590/SR650 Intel Xeon Silver 4210R 10C 100W 2.4GHZ Processor

Lenovo 4XG7A37981 Intel Xeon Silver 4210R 10-Core Server Processor

Overview

The Lenovo 4XG7A37981 is a factory-qualified 2nd Generation Intel Xeon Scalable processor — specifically the Intel Xeon Silver 4210R — designed for direct installation into Lenovo ThinkSystem SR550, SR590, and SR650 rack servers. If you're expanding compute capacity on one of those platforms, this is the Lenovo-sourced option that ensures firmware and thermal compatibility out of the box, eliminating the guesswork that comes with third-party CPU options. The 4210R delivers 10 cores and 20 threads at a 2.4 GHz base clock with a 3.2 GHz boost, keeping TDP at a managed 100W — a deliberate balance between multi-threaded throughput and power-per-rack constraints in dense deployments.

Key Features

• 10 Cores / 20 Threads at 2.4 GHz Base, 3.2 GHz Boost: The 4210R's 20-thread capacity means it handles concurrent workloads — virtualized security applications, VMS host services, database queries — without contention that degrades response times. The 3.2 GHz boost matters most for single-threaded bursts like codec transcoding or real-time alarm correlation.
• 100W Thermal Design Power (TDP): At 100W, this processor slots into the SR550/SR590/SR650 thermal envelope without requiring custom cooling modifications. Note that no cooler is included — the ThinkSystem platform's standard heatsink handles it, but confirm you have the correct heatsink SKU for your chassis configuration before installation.
• 13.75 MB L3 Cache: The on-die cache reduces memory latency for frequently accessed data sets — relevant in VMS deployments where frame buffers and metadata indices benefit from fast local access rather than repeated DRAM round-trips.
• LGA 3647 (Socket P) — Platform Lock-In by Design: LGA 3647 is specific to the Intel Scalable platform. This socket is only compatible with Lenovo ThinkSystem servers built on that architecture — SR550, SR590, SR650 in the case of this part number. Do not attempt to install in SR630 or SR650 V2 (next-gen) without confirming socket compatibility first.
• Up to 1 TB Maximum Memory Support: The 4210R supports up to 1 TB of system RAM per socket, giving the SR550/SR590/SR650 headroom to run memory-intensive workloads — large VM guest fleets, in-memory analytics, or NVR platforms requiring substantial frame buffer allocation — without hitting a memory ceiling prematurely.
• Dual UPI Links: Two Ultra Path Interconnect (UPI) links support high-bandwidth, low-latency inter-socket communication in dual-socket SR590/SR650 configurations. If you're populating both CPU sockets, UPI bandwidth directly affects NUMA performance for cross-socket memory access.
• 14nm Cascade Lake Architecture: The Cascade Lake generation adds hardware mitigations for Spectre/Meltdown variants at the silicon level, reducing the performance overhead that software patches imposed on earlier Skylake-SP systems — particularly relevant in security-conscious enterprise environments where those patches can't be disabled.
• 64-bit Operating Mode: Full 64-bit support is baseline for any modern server workload — this is not a constraint, but confirms compatibility with all current enterprise OS releases (Windows Server, RHEL, Ubuntu Server LTS, VMware ESXi).

Integration & Compatibility

The 4XG7A37981 is explicitly supported on the Lenovo ThinkSystem SR550, SR590, and SR650 — the model number itself encodes that compatibility scope. Lenovo-sourced processors carry firmware validation against the platform's UEFI/XCC management stack, which matters if you're running Lenovo XClarity Administrator for fleet management. Third-party Xeon Silver 4210R CPUs from Intel-direct or other channels may be physically identical but can trigger unsupported-hardware warnings in XCC, or fail to appear in Lenovo's warranty and support portal.

For dual-socket SR590 or SR650 deployments, both CPUs must be identical — same stepping, same Lenovo part number. Mixing 4210R with a different Silver-series SKU in the same chassis is not supported and will prevent POST in most configurations. Confirm your existing installed CPU SKU before ordering a second unit.

This processor is compatible with rack server platforms built on the Intel Scalable LGA 3647 platform. If you're building out or expanding a Lenovo ThinkSystem server infrastructure, sourcing processors through the Lenovo part number ensures alignment with the platform's thermal and firmware validation matrix. For supporting components, review compatible server memory modules rated for DDR4 on this platform, and ensure your rack infrastructure supports the power draw of your fully populated server configuration.

Frequently Asked Questions

Q: Which Lenovo server models is the 4XG7A37981 compatible with?

A: The 4XG7A37981 is validated for the Lenovo ThinkSystem SR550, SR590, and SR650. These are the only platforms listed in the Lenovo part number description. Do not install in SR630, SR650 V2, or other ThinkSystem models without independently verifying socket and firmware compatibility.

Q: Does the 4XG7A37981 include a heatsink or thermal solution?

A: No. This processor ships as CPU-only. The ThinkSystem SR550/SR590/SR650 uses a platform-specific heatsink that must be ordered separately if not already installed in your chassis.

Q: Can I use two 4XG7A37981 processors in a dual-socket SR590 or SR650?

A: Yes — the SR590 and SR650 support dual-socket Xeon Scalable configurations. Both processors must be the same SKU and stepping. Two units of 4XG7A37981 is a supported configuration, giving you 20 cores and 40 threads total with dual UPI inter-socket links.

Q: What is the base and boost clock speed of the Xeon Silver 4210R?

A: The 4210R runs at 2.4 GHz base frequency with a 3.2 GHz maximum boost frequency, across 10 cores and 20 threads, at a 100W TDP.

Q: How much RAM does the 4XG7A37981 support per socket?

A: The Intel Xeon Silver 4210R supports up to 1 TB of system memory per socket on compatible platforms, giving the SR550/SR590/SR650 substantial headroom for memory-intensive server workloads.

Q: Is this a new processor or a refurbished unit?

A: This is a factory-new, genuine Lenovo-sourced processor — not refurbished, not a pull, and not a grey-market import.

James Everett

The 4XG7A37981 is one of those parts where sourcing discipline matters as much as the spec sheet. The Xeon Silver 4210R at 2.4 GHz base / 3.2 GHz boost with a 100W TDP is a well-understood mid-tier Scalable processor — but the Lenovo part number binding to SR550/SR590/SR650 is what you're actually paying for here. Third-party 4210R units will physically seat in the same socket, but Lenovo's XCC management firmware treats unverified CPU SKUs as unsupported hardware, which surfaces in health dashboards and can affect warranty standing on the chassis.

Technical Highlights:

• 10C/20T at 100W TDP: The 4210R's thread count handles parallelized server workloads efficiently — 20 threads at 100W is roughly 5W per thread, which is favorable for multi-tenant VM hosts running security or surveillance applications where you need headroom across dozens of concurrent processes without blowing your per-chassis power budget.
• 3.2 GHz Boost Frequency: The 800 MHz delta between base and boost (2.4→3.2 GHz) is meaningful for latency-sensitive operations — real-time video analytics processing, alarm event handling, or NVR indexing tasks that don't parallelize well but need fast single-core response.
• 1 TB Max Memory Support: At 1 TB per socket, an SR650 in dual-socket configuration with two of these processors can support up to 2 TB of system RAM — relevant for large-scale VMS platforms or hypervisor hosts running memory-heavy guest OSes where memory over-commitment isn't an option.

Deployment Considerations:

• No heatsink ships with this unit — confirm your SR550/SR590/SR650 chassis already has the correct Lenovo heatsink installed before ordering. The standard and high-performance heatsink SKUs differ for single vs. dual-socket configurations.
• In dual-socket SR590 or SR650 builds, both CPUs must match on stepping, not just model number. Lenovo's UEFI will halt POST if mismatched stepping is detected — order both units from the same fulfillment batch when possible to guarantee stepping alignment.

This processor is the right call for IT teams standardizing on Lenovo ThinkSystem infrastructure who need a mid-range Xeon Scalable option with documented platform compatibility — specifically in SR550/SR590/SR650 expansions where XCC health monitoring and warranty continuity are non-negotiable requirements.