Lenovo 4XG7A37974 SR590/SR650 Xeon Gold 5220R

Lenovo 4XG7A37974 Xeon Gold 5220R 24-Core Server Processor

Overview

The Lenovo 4XG7A37974 is a factory-sourced 2nd Generation Intel Xeon Gold 5220R processor designed as a drop-in upgrade or primary CPU option for Lenovo ThinkSystem SR590 and SR650 rack servers. Built on Intel's Cascade Lake architecture at 14nm, this 24-core, 24-thread chip runs at a 2.2 GHz base with a 4 GHz Turbo Boost ceiling — making it a practical fit for compute-dense workloads where sustained throughput matters more than single-thread peak. If you're spec'ing a server for network video recorders, virtualization, or analytics offload, this is the processor tier that handles parallel workloads without throttling under sustained load.

This is a Lenovo-qualified component, sourced for the SR590 and SR650 platform specifically. Using platform-validated parts eliminates firmware compatibility guesswork and keeps your server under manufacturer warranty terms — a real consideration for production deployments where an incompatible third-party CPU can void support on a $10,000 chassis.

Key Features

• 24 Cores / 24 Threads at 2.2 GHz Base: Twenty-four physical cores means the OS and hypervisor can distribute workloads across genuine compute resources — not hyperthreaded virtual cores. For VMS analytics, encoding pipelines, or containerized microservices, more physical cores translates to more consistent parallel throughput without contention.
• 4 GHz Turbo Boost: When workloads spike on a subset of cores — database queries, on-demand transcoding, burst alert processing — the processor scales individual cores up to 4 GHz automatically. That 1.8 GHz headroom above base clock is meaningful for latency-sensitive tasks that can't be parallelized.
• 35.75 MB L3 Cache: A larger L3 cache reduces main-memory fetch latency for data sets that fit within the cache footprint. For video analytics engines that repeatedly reference the same detection models or lookup tables, this is the spec that prevents unnecessary memory bus thrashing across 24 cores.
• 150W TDP — Plan Your Thermal Budget: At 150W TDP, this processor draws real power. The SR590 and SR650 are engineered to handle this thermal envelope with their standard cooling configurations, but if you're densely populated with dual CPUs and heavy DIMMs, verify your rack's power delivery and cooling capacity before deployment. A cooler is not included with this kit — the server chassis cooler is expected to be present.
• 1 TB Maximum Memory Support: The 5220R supports up to 1 TB of DDR4 RAM per socket via the LGA 3647 platform. For hypervisor deployments running multiple VMs — a common pattern in enterprise security operations centers — this ceiling gives substantial headroom for memory-hungry workloads without hitting DIMM count limits prematurely.
• Dual UPI Links: The two Ultra Path Interconnect (UPI) links support efficient CPU-to-CPU communication in dual-socket SR650 configurations. If you're building a two-socket server for high-channel-count NVR or analytics, UPI coherency keeps inter-socket latency predictable rather than degrading under cross-CPU memory access patterns.
• LGA 3647 (Socket P) — 2nd Gen Scalable Platform: Socket P is the standard for 2nd Generation Xeon Scalable processors. This means the 4XG7A37974 is compatible with the same memory, PCIe topology, and platform features already validated for the SR590/SR650 — no BIOS surprises, no platform feature gaps compared to a factory-configured unit.
• 64-Bit Operating Mode: Full 64-bit instruction support is expected at this tier, but it matters to confirm for licensing and OS compatibility — particularly for organizations running 64-bit-only hypervisors or enterprise software that checks processor capability flags at install time.

Integration and Compatibility

The 4XG7A37974 is validated for the Lenovo ThinkSystem SR590 and SR650 server platforms. These 1U and 2U rack servers respectively are common in enterprise deployments for their dense I/O, dual-socket capability, and support for NVMe storage — relevant if you're pairing this CPU with high-throughput storage for video surveillance NVR workloads or AI inference pipelines. The SR650 in particular supports dual Xeon Scalable sockets, so the 5220R can be paired in a two-socket configuration for 48 physical cores total.

From a server components and platform compatibility standpoint, this processor fits within the broader 2nd Gen Xeon Scalable ecosystem — meaning existing DDR4 RDIMM and LRDIMM memory already in the SR590/SR650 remains compatible. No platform-level memory or PCIe changes are required when upgrading from a lower-tier Cascade Lake CPU within the same socket generation. If you're evaluating CPU options for datacenter builds or upgrading existing Lenovo infrastructure, confirm current UEFI/BIOS firmware versions support the 5220R before scheduling maintenance windows — Lenovo's firmware release notes for SR590/SR650 document the minimum required firmware per CPU model.

Frequently Asked Questions

Q: What servers is the Lenovo 4XG7A37974 compatible with?

A: The 4XG7A37974 is specifically validated for the Lenovo ThinkSystem SR590 and SR650 server platforms. It uses the LGA 3647 (Socket P) interface and is part of the 2nd Generation Intel Xeon Scalable (Cascade Lake) platform supported by those servers.

Q: Does the 4XG7A37974 include a heatsink or cooler?

A: No. The 4XG7A37974 does not include a cooler. The ThinkSystem SR590 and SR650 use server chassis-integrated cooling solutions. Confirm that the appropriate heatsink for your chassis configuration is already installed before deploying this CPU.

Q: What is the TDP of the Xeon Gold 5220R, and what does that mean for power planning?

A: The Xeon Gold 5220R has a 150W Thermal Design Power (TDP). In a dual-socket SR650 configuration, plan for up to 300W of CPU thermal load alone. Ensure your rack PDU, UPS, and chassis cooling are rated to handle this alongside memory, storage, and PCIe devices.

Q: How many cores and threads does the 5220R provide?

A: The 5220R delivers 24 physical cores and 24 threads. Unlike some Xeon tiers that use Hyper-Threading to double thread counts, this processor runs one thread per core — relevant for workloads where physical core count is the performance constraint, such as parallel video analytics or VM density.

Q: What is the maximum RAM this processor supports?

A: Each 5220R socket supports up to 1 TB of memory. In a dual-socket SR650, the combined platform can support up to 2 TB of DDR4 RAM, dependent on DIMM configuration and LRDIMM availability.

Q: What is the processor's boost clock speed?

A: The Xeon Gold 5220R boosts to 4 GHz on active cores under Intel Turbo Boost. The base clock is 2.2 GHz across all 24 cores under full load.

Karl Wilson

The 4XG7A37974 is a purpose-sourced Lenovo component — and that distinction matters more than it sounds. The Xeon Gold 5220R's 24 physical cores at 150W TDP put it squarely in the sustained-throughput tier of the Cascade Lake lineup, and pairing it as a Lenovo-validated part for the SR590/SR650 means you're not guessing on BIOS microcode compatibility or thermal validation. I've seen third-party CPU sourcing create firmware headaches that cost more in engineering time than the margin saved on the component.

Technical Highlights:

• 24 Physical Cores: No Hyper-Threading inflation — 24 real cores means 24 parallel execution contexts. For analytics workloads or dense VM environments, this is the compute you can actually count on versus thread-count marketing.
• 4 GHz Turbo / 35.75 MB Cache: The combination of burst headroom and large L3 cache is what separates this from entry-tier Scalable chips. Workloads with hot data sets — detection model inference, active alert correlation — stay in cache rather than round-tripping to DDR4.
• 1 TB Memory Ceiling per Socket: At 1 TB per socket, the SR650 in dual-CPU config can reach 2 TB total. For hypervisors running 30–40 security application VMs, this headroom avoids memory overcommit ratios that degrade real-time analytics latency.

Deployment Considerations:

• No cooler is included — this assumes the SR590 or SR650 chassis heatsink is already in place. If you're adding a second CPU to an SR650 that shipped single-socket, verify the second-socket heatsink is present before scheduling the install.
• At 150W TDP, confirm your rack PDU branch circuit and UPS runtime calculations account for the full dual-CPU thermal envelope, plus NVMe drives and PCIe cards — this is a real planning gap in dense builds that gets missed until the UPS trips under load.

This processor fits best in SR650 dual-socket builds where the workload justifies 48 physical cores — think high-channel-count VMS servers running server-side analytics, or enterprise virtualization hosts consolidating multiple security application workloads onto a single well-supported Lenovo platform.