Lenovo 4XG7A63442 SR650 V2 Gold 5318S 24C 165W 2.1GHZ

Lenovo 4XG7A63442 Intel Xeon Gold 5318S 24-Core Processor Option for ThinkSystem SR650 V2

Overview

The Lenovo 4XG7A63442 is a factory-configured processor option kit delivering the Intel Xeon Gold 5318S to the ThinkSystem SR650 V2 two-socket rack server. With 24 cores, 48 threads, a 2.1 GHz base clock, and a 165W TDP, this third-generation Intel Xeon Scalable processor targets compute-intensive enterprise workloads — virtualization hosts, VMS recording servers, AI-inference pipelines, and data-intensive analytics platforms — where thread count and sustained throughput per socket matter more than single-threaded peak speed. If you are configuring or expanding an SR650 V2 and need validated, channel-sourced processor hardware, the 4XG7A63442 is the correct Lenovo OEM part number to specify.

Key Features

• 24 Cores / 48 Threads: The 5318S delivers 24 physical cores per socket, exposing 48 logical threads to the OS via Hyper-Threading. On a dual-socket SR650 V2, that scales to 48 physical cores and 96 threads — enough headroom to run dozens of concurrent VMs or high-channel-count VMS workloads without contention.
• 2.1 GHz Base / 3.4 GHz Boost Frequency: The 2.1 GHz base frequency keeps power consumption predictable under sustained all-core load, while the 3.4 GHz Turbo Boost ceiling handles latency-sensitive single-threaded bursts — relevant when a VMS performs concurrent motion-search queries or when a database executes complex joins.
• Asymmetric Core Architecture — 8 High-Priority + 16 Standard Cores: The 5318S implements a tiered core design: 8 high-priority cores run at 2.3 GHz sustained while 16 standard cores hold at 1.8 GHz. OS and hypervisor schedulers that are aware of this topology (VMware vSphere 7+, Windows Server 2022, Linux kernel 5.12+) can pin latency-critical threads to the faster cores, improving responsiveness in mixed workload environments without manual affinity tuning.
• 36 MB L3 Cache: 36 MB of last-level cache across 24 cores reduces DRAM fetch latency on working sets that fit — a meaningful advantage for in-memory analytics, video frame buffering, and edge AI inference tasks where random-access latency is the bottleneck.
• 165W TDP: At 165W, the 5318S sits within the standard SR650 V2 thermal envelope. Verify your chassis cooling configuration (fan policy, ambient temperature, airflow path) before deploying at full utilization — Lenovo's XClarity tooling can validate the thermal margin for your specific configuration.
• 48-Lane PCIe 4.0 via LGA 4189 Socket: The LGA 4189 (Socket P+) platform doubles PCIe bandwidth versus Gen 3, benefiting GPU accelerators, high-throughput NVMe storage arrays, and 25/100GbE NICs that saturate PCIe 3.0 links. This is the socket shared across all third-generation Xeon Scalable SR650 V2 processors, ensuring platform compatibility with other OPT kits in the same family.
• 11.2 GT/s UPI System Bus: The 11.2 GT/s UltraPath Interconnect rate governs inter-socket bandwidth in dual-CPU deployments. For memory-bound workloads in a two-socket configuration — database joins, large-model inference, multi-stream video analytics — this bus rate sets the ceiling on NUMA cross-socket transfers. Plan NUMA-aware memory allocation in your hypervisor to minimize cross-socket traffic.
• 10 nm Intel 3rd-Gen Process Node: The Ice Lake Xeon Scalable 10 nm fabrication node delivers improved instructions-per-clock over prior Cascade Lake generations and adds native support for Intel DL Boost (VNNI), which accelerates INT8 and BF16 deep-learning inference workloads on-chip — no discrete accelerator required for moderate inference throughput.
• 64-Bit Operating Mode / 48-Thread OS Exposure: Supports all current 64-bit server operating systems and hypervisors. No additional licensing or BIOS flags are required beyond standard SR650 V2 firmware at the revision level that supports third-generation Xeon Scalable processors.

Integration & Compatibility

The 4XG7A63442 is validated for the Lenovo ThinkSystem SR650 V2 platform. It occupies one of the two server processor sockets (LGA 4189) and must be paired with appropriate DDR4 registered ECC memory at speeds supported by the 5318S memory controller. When populating both sockets in an SR650 V2, both processors should be identical or within the same thermal and bus-speed tier to avoid asymmetric performance profiles under NUMA scheduling. Consult the rack server configuration guide for validated memory population rules — the 5318S supports up to 8 memory channels per socket, and populating all channels maximizes memory bandwidth for throughput-sensitive workloads. For environments deploying network video recorders or AI-driven analytics at scale, verifying XClarity Controller firmware compatibility with third-generation Xeon Scalable before deployment is strongly recommended.

Frequently Asked Questions

Q: What server platform is the Lenovo 4XG7A63442 designed for?

A: The 4XG7A63442 is a processor option kit validated for the Lenovo ThinkSystem SR650 V2 two-socket rack server. It installs into the LGA 4189 (Socket P+) processor socket and requires SR650 V2 firmware that supports third-generation Intel Xeon Scalable processors.

Q: How many cores and threads does the Intel Xeon Gold 5318S provide?

A: The 5318S delivers 24 physical cores and 48 threads per socket via Intel Hyper-Threading. In a dual-socket SR650 V2 configuration with two 4XG7A63442 units, the system exposes 48 physical cores and 96 logical threads to the operating system.

Q: What is the TDP of the 5318S processor in this kit?

A: The Intel Xeon Gold 5318S has a rated TDP of 165W. Confirm that your SR650 V2 cooling configuration — fan policy, ambient temperature, and airflow path — supports this thermal load before deploying at sustained full utilization.

Q: Does the 5318S support Intel DL Boost for AI inference workloads?

A: Yes. The 5318S is a third-generation Intel Xeon Scalable (Ice Lake) processor manufactured on the 10 nm node, which includes native Intel DL Boost (VNNI instruction set) for accelerating INT8 and BF16 deep-learning inference on-chip — no discrete GPU accelerator is required for moderate inference throughput.

Q: What PCIe generation does the LGA 4189 platform support?

A: The LGA 4189 socket used by the 5318S supports PCIe 4.0, which doubles bandwidth per lane compared to PCIe 3.0. This benefits high-throughput NVMe storage arrays, 25/100GbE network adapters, and GPU accelerators that saturate PCIe 3.0 links.

Q: Can two 4XG7A63442 processor kits be installed in the same SR650 V2?

A: Yes — the SR650 V2 supports two LGA 4189 sockets. Installing two identical 5318S processors enables a symmetric NUMA configuration, which is the recommended approach for virtualization hosts and memory-bandwidth-intensive workloads. Mixed processor configurations (different models in the two sockets) may result in asymmetric performance and are generally not recommended.

Jerry Tildsen

The 4XG7A63442 is one of the more interesting processor options in the SR650 V2 lineup — the 5318S brings a tiered core design (8 high-priority cores at 2.3 GHz, 16 standard cores at 1.8 GHz) that most buyers overlook when comparing raw GHz numbers. For workloads that mix latency-sensitive foreground tasks with background batch processing, that asymmetry is useful. I reach for this SKU when a customer needs 24-core density at 165W without climbing into the higher-TDP bins.

Technical Highlights:

• 36 MB L3 Cache / 24 Cores: 1.5 MB of L3 per core keeps frequently accessed working sets off DRAM — meaningful for in-memory databases, video analytics frame buffers, and inference pipelines where repeated random access to a moderate-sized dataset would otherwise saturate memory bandwidth.
• 11.2 GT/s UPI Bus: In a dual-socket SR650 V2, UPI is the NUMA inter-socket fabric. At 11.2 GT/s, cross-socket memory fetches are fast enough to run most VM workloads without strict NUMA pinning, but for latency-critical applications — real-time analytics, low-latency messaging — NUMA-aware placement still pays dividends.
• 10 nm Ice Lake + Intel DL Boost (VNNI): Native INT8/BF16 vector operations via VNNI mean you can run lightweight inference models (object detection, anomaly scoring, NLP classification) directly on the CPU at reasonable throughput — no GPU required for moderate batch sizes. That matters for air-gapped environments where adding a GPU card is impractical.

Deployment Considerations:

• Verify SR650 V2 XClarity Controller and UEFI firmware supports third-generation Xeon Scalable before installing. Lenovo publishes a validated firmware matrix per processor OPT kit — check it before the maintenance window, not during.
• The 165W TDP is the ceiling, not the floor. Under light virtualization loads the 5318S will run well below that, but plan cooling for peak: sustained all-core AVX-512 workloads (ML training, large-scale compression) will push the full envelope and require adequate fan policy and chassis airflow.

This is the right processor option for SR650 V2 deployments running high-channel VMS platforms, multi-tenant virtualization hosts, or CPU-bound analytics pipelines where 24 cores at a controlled 165W envelope is the target — particularly in dense rack deployments where per-server power budgets are constrained.