Lenovo 4XG7A38079 SR650 Xeon Gold 6240R

Lenovo 4XG7A38079 Intel Xeon Gold 6240R Processor Option for ThinkSystem SR650

Overview

The Lenovo 4XG7A38079 is an Intel Xeon Gold 6240R processor option kit engineered for deployment in the Lenovo ThinkSystem SR650 2-socket rack server. Built on Intel's 2nd Generation Xeon Scalable (Cascade Lake) architecture at 14nm, the 6240R delivers 24 cores and 48 threads at a 2.4GHz base clock with a 4.0GHz Turbo Boost frequency — providing the computational headroom needed for virtualized security workloads, multi-stream video analytics, AI inference at the edge, and dense NVR or VMS server builds. If your SR650 deployment is running a single processor and you need to maximize throughput for expanding camera counts or heavier analytics pipelines, the 4XG7A38079 is the direct upgrade path.

For teams building or expanding Lenovo server infrastructure, this processor option integrates cleanly into existing SR650 chassis without additional chassis modifications.

Key Features

• 24 Cores / 48 Threads (Intel Xeon Gold 6240R): Forty-eight logical processors give hypervisors like VMware vSphere or Microsoft Hyper-V ample headroom to schedule concurrent workloads — run your VMS, analytics engine, and database tier on the same server without CPU contention choking throughput during peak camera activity.
• 2.4GHz Base / 4.0GHz Turbo Boost: The 1.6GHz spread between base and boost means lightly threaded tasks (real-time motion detection, single-stream transcoding) get the clock speed they need, while sustained all-core workloads (mass export, batch analytics, multi-tenant VM consolidation) maintain a solid 2.4GHz floor. Real-world: you won't see the clock-speed cliff that plagues older Broadwell-era Xeon options under mixed load.
• 35.75MB L3 Cache: A large last-level cache reduces main-memory round trips on working sets that fit — video frame buffers, analytics model parameters, and index structures for motion databases all benefit. Less cache thrashing means more consistent frame decode latency under load.
• 165W Thermal Design Power (TDP): At 165W TDP, this processor sits in the high-performance tier of the SR650's supported CPU range. The SR650 chassis is rated to handle this thermal envelope with its standard cooling configuration, but verify your data center's per-rack power allocation — two of these in a dual-socket SR650 draws a meaningful chunk of a 30A circuit before you count DIMMs, drives, and NICs.
• Up to 1TB DDR4 Memory Support: The 6240R supports up to 1TB of DDR4-SDRAM across the SR650's memory slots. For VMS deployments running large in-memory video indexes or AI inference workloads that keep model weights in RAM, this ceiling matters — it means you won't be forced to a higher-tier platform just to break the 768GB memory barrier found on some prior-gen Xeon options.
• LGA 3647 (Socket P) — Platform Lock-In Clarity: This processor is physically and electrically keyed to the Socket P ecosystem. It will only seat in SR650 motherboards with the LGA 3647 socket. Do not attempt to install in SR630 or SR550 variants without confirming socket compatibility in Lenovo's official compatibility matrix — the socket looks similar across 1S and 2S ThinkSystem platforms but board-level power delivery differs.
• 48 Hardware Threads via Hyper-Threading: Intel's Hyper-Threading doubles the logical core count to 48. For I/O-bound security workloads (network packet processing, disk write queues for high-bitrate recording, concurrent RTSP stream ingestion) where threads frequently wait on I/O, HTT meaningfully increases useful throughput without adding physical cores.
• UPI Interconnect (Ultra Path Interconnect): In a dual-socket SR650 configuration, UPI handles CPU-to-CPU cache coherency and NUMA communication. High-speed UPI reduces the latency penalty of cross-socket memory access — relevant if your workload spans both sockets (e.g., a VMS process on socket 0 accessing video buffers allocated by an analytics service on socket 1).
• 64-bit Operating Modes: Supports all modern 64-bit operating systems including Windows Server 2019/2022 and RHEL/CentOS/Ubuntu LTS — no compatibility surprises when deploying standard enterprise NVR or VMS server operating environments.

Integration & Compatibility

The 4XG7A38079 is a Lenovo-qualified option kit validated specifically for the ThinkSystem SR650 platform. Installation requires the SR650 chassis with an available LGA 3647 processor socket, compatible cooling hardware (processor heat sink — verify Lenovo's SR650 configurator for the correct heat sink part number at 165W TDP), and BIOS firmware at a revision that supports 2nd Generation Xeon Scalable processors. Check Lenovo's ServerProven compatibility database before procurement if you are upgrading an older SR650 that shipped with a 1st Generation Xeon Scalable CPU — a BIOS update to a compatible revision is typically required.

Pairing this processor with appropriate server memory — specifically DDR4 RDIMMs or LRDIMMs validated for the SR650 — is essential to achieving the platform's rated memory bandwidth. The 6240R supports DDR4 memory controllers natively; mismatched or unvalidated DIMMs can result in reduced clock speeds or instability. For rack server builds supporting multi-channel video surveillance or AI-at-the-edge workloads, provisioning adequate DRAM alongside this processor upgrade is not optional — it is the primary determinant of sustained throughput.

If your deployment involves a high-density storage configuration for long-retention video archives, confirm that the SR650's storage backplane and HBA are also supported at the firmware revision required by the Xeon Gold 6240R BIOS baseline. Mixed-generation firmware stacks on the SR650 are a documented source of degraded NVMe performance that can show up as dropped frames in recording pipelines.

Frequently Asked Questions

Q: What server platform is the Lenovo 4XG7A38079 compatible with?

A: The 4XG7A38079 is a processor option kit validated for the Lenovo ThinkSystem SR650 2-socket rack server. It uses the LGA 3647 (Socket P) interface and is not interchangeable across other ThinkSystem platforms without verifying Lenovo's ServerProven compatibility matrix for the specific chassis model and BIOS revision.

Q: How many cores and threads does the Xeon Gold 6240R provide?

A: The Intel Xeon Gold 6240R delivers 24 physical cores and 48 threads via Intel Hyper-Threading Technology, running at a 2.4GHz base frequency with a maximum Turbo Boost frequency of 4.0GHz.

Q: What is the TDP of the Xeon Gold 6240R and does the SR650 support it?

A: The 6240R has a 165W Thermal Design Power rating. The ThinkSystem SR650 is designed to support high-TDP processors in this range; however, you should confirm the correct heat sink part number for 165W operation via Lenovo's SR650 configuration documentation, as the required cooling hardware may differ from lower-TDP processor options.

Q: How much memory does the Xeon Gold 6240R support?

A: The processor supports up to 1TB of DDR4-SDRAM. Achieving this maximum requires populating the SR650 memory slots with validated DDR4 RDIMM or LRDIMM modules per Lenovo's memory compatibility guide for the SR650 platform.

Q: Is a BIOS update required to install the 4XG7A38079 in an existing SR650?

A: If the SR650 was originally configured with a 1st Generation Intel Xeon Scalable processor, a BIOS firmware update is typically required before installing a 2nd Generation Xeon Scalable processor such as the 6240R. Consult Lenovo's firmware update matrix for the SR650 to identify the minimum required BIOS revision before installation.

Q: What is the processor codename and manufacturing node for the Xeon Gold 6240R?

A: The Intel Xeon Gold 6240R is built on Intel's Cascade Lake architecture using a 14nm manufacturing process. It is part of Intel's 2nd Generation Xeon Scalable product family.

James Everett

The 4XG7A38079 is the processor upgrade I'd reach for when an SR650 deployment has outgrown its original CPU configuration — specifically, when you're running a VMS like Milestone or Genetec on a virtualized stack and the analytics pipeline is starving for threads. The Xeon Gold 6240R's 48-thread count at a 4.0GHz boost ceiling gives you genuine headroom for mixed I/O and compute workloads on a single 2U chassis, which is exactly what a dense IP camera environment demands.

Technical Highlights:

• 24 Cores / 48 Threads: In virtualized VMS environments, more threads mean fewer scheduling stalls when concurrent camera streams compete for CPU time — 48 logical processors handle significantly more parallel decode and analytics tasks than the 24-thread Xeon Silver options in the same socket class.
• 4.0GHz Turbo Boost: Single-threaded bursts at 4.0GHz matter for real-time motion detection algorithms that aren't fully parallelized — the 6240R's boost headroom is 1.6GHz above base, which translates to measurably lower per-frame latency on alert-triggered recording workflows.
• 1TB DDR4 Memory Ceiling: Security deployments running in-memory video indexes or deep learning inference models benefit from this ceiling — it eliminates the need to scale out to a second server just to break a memory barrier that a lower-tier Cascade Lake option would impose.

Deployment Considerations:

• At 165W TDP, confirm the SR650 is equipped with the correct high-performance heat sink for this processor tier before installation — the standard heat sink shipped with lower-TDP CPUs is not adequate and will trigger thermal throttling under sustained load.
• If upgrading from a 1st Generation Xeon Scalable CPU, a BIOS firmware update on the SR650 is required before the system will POST with the 6240R installed — skipping this step will result in a non-booting server, not a graceful error.

This processor option is best positioned in SR650 deployments serving as consolidated VMS servers for 100+ camera environments, or as the compute backbone in AI-driven video analytics nodes where sustained multi-threaded throughput and large memory addressability are the binding constraints.