Lenovo 4XG7A63458 SR650 V2 Gold 6338T 24C 165W 2.1GHZ

Lenovo 4XG7A63458 Intel Xeon Gold 6338T 24-Core Server Processor

Overview

The Lenovo 4XG7A63458 is an Intel Xeon Gold 6338T processor designed for deployment in the Lenovo ThinkSystem SR650 V2 rack server. Built on Intel's 3rd Generation Xeon Scalable architecture (Ice Lake, 10 nm), this 24-core, 48-thread CPU runs at a 2.1 GHz base clock with a 3.4 GHz boost frequency — delivering the parallel compute headroom that enterprise server platforms demand for workloads like video analytics processing, database engines, and virtualization hosts. At 165W TDP, it sits in the upper mid-range of the Lenovo ThinkSystem processor lineup, offering a deliberate balance between thread count and per-core frequency that suits throughput-oriented workloads over single-threaded latency-sensitive tasks.

Key Features

• 24 Cores / 48 Threads: With 24 physical cores and 48 logical threads via Hyper-Threading, this processor handles heavily concurrent workloads — think VMs running simultaneously, parallel analytics pipelines, or multi-stream media processing — without forcing a core-count upgrade to a higher TDP tier.
• 2.1 GHz Base / 3.4 GHz Boost: The 2.1 GHz base clock is conservative enough to sustain full 24-core utilization within the 165W TDP envelope. When workloads concentrate on fewer cores, the 3.4 GHz boost kicks in — useful for OS scheduling, database query optimization, or any task where single-thread speed matters.
• Asymmetric Core Configuration: Intel's Speed Select Technology on the 6338T segments cores into 8 high-priority cores running at 2.3 GHz and 16 low-priority cores at 1.9 GHz. This lets the OS scheduler and platform firmware route latency-sensitive threads to faster cores without manual tuning — a meaningful operational simplification in mixed-workload deployments.
• 36 MB Intel Smart Cache: The 36 MB last-level cache reduces main-memory accesses on data-intensive workloads. For applications that repeatedly touch the same working sets — real-time analytics, in-memory lookup tables, or streaming media buffers — this cache depth can noticeably reduce latency spikes under sustained load.
• 48 Threads at LGA 4189 Socket: The LGA 4189 socket is specific to 3rd Gen Intel Xeon Scalable (Ice Lake-SP) platforms. Confirm your SR650 V2 board revision supports this socket before ordering — not all SR650 variants share the same socket generation.
• 11.2 GT/s System Bus: The 11.2 GT/s UPI (Ultra Path Interconnect) bus rate governs CPU-to-CPU and CPU-to-chipset bandwidth in dual-socket configurations. If the SR650 V2 is provisioned with two processors, both must match — mismatched UPI rates force the faster chip to negotiate down.
• 10 nm Ice Lake Lithography: Intel's 10 nm process node delivers improved instructions-per-clock efficiency compared to the prior 14 nm Cascade Lake generation. The practical result is more compute throughput per watt, which matters when you're running this processor 24/7 in a data center where power and cooling costs accumulate.
• 165W TDP: At 165W, this processor requires confirmed thermal headroom in the SR650 V2 chassis. Verify your cooling configuration (fan speed policy, ambient temperature) against Lenovo's thermal design guidelines for this SKU before deployment in high-ambient or restricted-airflow environments.

Integration & Compatibility

The 4XG7A63458 is a server processor upgrade qualified for the Lenovo ThinkSystem SR650 V2 platform. Processor compatibility in enterprise servers is tightly controlled — confirm compatibility against Lenovo's SR650 V2 product compatibility matrix before purchasing, particularly for dual-socket configurations where both processor SKUs must be identical. The LGA 4189 socket is not backward-compatible with 2nd Gen Xeon Scalable (Cascade Lake) motherboards. This processor supports 64-bit operating modes, making it compatible with all current enterprise Linux distributions, Windows Server editions, and VMware ESXi hypervisors that support the 3rd Gen Xeon Scalable platform. For deployments running network video recorder software or AI-driven analytics engines on a Lenovo server platform, the 48-thread count provides meaningful headroom for concurrent stream processing without saturating available CPU resources.

Frequently Asked Questions

Q: Which Lenovo server platform is the 4XG7A63458 compatible with?

A: The 4XG7A63458 is qualified for the Lenovo ThinkSystem SR650 V2. It uses the LGA 4189 socket specific to 3rd Generation Intel Xeon Scalable (Ice Lake-SP) processors. Always verify against Lenovo's official SR650 V2 compatibility matrix before ordering.

Q: Can the 4XG7A63458 be used in a dual-socket SR650 V2 configuration?

A: Yes, the SR650 V2 supports dual-socket configurations. However, both processors must be identical SKUs — mixing different Xeon models in a dual-socket server is not supported. Also note that both processors must share the same 11.2 GT/s UPI bus rate for the interconnect to operate at full bandwidth.

Q: What is the TDP of the Xeon Gold 6338T in the 4XG7A63458?

A: The Intel Xeon Gold 6338T operates at a 165W TDP. Ensure the SR650 V2 chassis cooling configuration — fan policy, airflow path, and ambient temperature — meets Lenovo's thermal requirements for this processor before deployment.

Q: Does the 4XG7A63458 support Hyper-Threading?

A: Yes. The Intel Xeon Gold 6338T features 24 physical cores with Hyper-Threading enabled, delivering 48 logical threads to the operating system. This is beneficial for heavily multi-threaded workloads such as virtualization, analytics, and concurrent video processing tasks.

Q: Is this processor compatible with 2nd Gen Xeon Scalable (Cascade Lake) motherboards?

A: No. The LGA 4189 socket used by 3rd Gen Intel Xeon Scalable processors is not backward-compatible with LGA 3647 sockets used by 2nd Gen Cascade Lake processors. Confirm your server's socket type before purchasing.

Q: What operating systems are supported by the 4XG7A63458?

A: The Intel Xeon Gold 6338T supports 64-bit operating modes, making it compatible with current enterprise operating systems including Windows Server, major Linux distributions (RHEL, SLES, Ubuntu Server), and VMware ESXi on platforms that support the 3rd Gen Xeon Scalable architecture.

Ted Perry

The 4XG7A63458 is one of the more interesting processor choices in the SR650 V2 lineup because of its asymmetric core architecture — Intel's Speed Select Technology splits the 24 cores into 8 high-priority cores at 2.3 GHz and 16 low-priority cores at 1.9 GHz, which is genuinely useful when your workload mixes latency-sensitive foreground tasks with background batch processing on the same physical host.

Technical Highlights:

• 48 Threads at 165W: You're getting 48 logical threads within a 165W envelope — a solid thread-per-watt ratio that makes this processor a reasonable fit for high-density virtualization hosts where power budget per rack unit is a constraint.
• 3.4 GHz Boost on Lightly Loaded Cores: The 3.4 GHz turbo frequency is 1.3 GHz above the base clock — meaningful for OS-level scheduling, query optimization, and any process that doesn't scale linearly with core count.
• 36 MB Last-Level Cache: For workloads with predictable, repeated data access patterns — such as analytics engines scanning fixed data sets or media servers buffering active streams — 36 MB of shared cache reduces round-trips to DRAM, keeping latency flatter under sustained load.

Deployment Considerations:

• Dual-socket SR650 V2 builds require two identical 4XG7A63458 units — budget for the pair if the workload justifies it, and order both at the same time to avoid stock mismatches that delay commissioning.
• At 165W, this is a high-TDP processor — verify the SR650 V2 chassis fan configuration and data center ambient temperature before deployment. Lenovo's thermal design guidelines for this SKU are not optional reading in restricted-airflow environments.

This processor is a practical fit for SR650 V2 deployments running mixed virtualization and analytics workloads — particularly where the asymmetric core speed configuration can be exploited by an OS or hypervisor that supports Intel Speed Select Technology thread classification.