Lenovo 4XG7A72942 ST650 V2 Gold 6338T 24C 165W 2.1GHZ

Lenovo 4XG7A72942 Intel Xeon Gold 6338T 24-Core Processor Option for ThinkSystem ST650 V2

Overview

The Lenovo 4XG7A72942 is a factory processor option that installs the Intel Xeon Gold 6338T into the ThinkSystem ST650 V2 tower server — a 24-core, 48-thread 3rd Generation Intel Xeon Scalable part running at 2.1 GHz base with a 3.4 GHz boost ceiling. At 165W TDP and socketed on LGA 4189, this is the processor you specify when you need a high thread count in a tower form factor for workloads like multi-channel video analytics, large-dataset VMS backend processing, or compute-intensive surveillance inference tasks that would saturate a lower-core-count option.

The 6338T's differentiated priority-core architecture — 8 high-priority cores at 2.3 GHz and 16 efficiency cores at 1.9 GHz — makes it particularly well-suited to mixed workloads where a handful of latency-sensitive tasks (live stream decode, alert processing) run alongside bulk background jobs (recording writes, analytics batch inference). Browse the Lenovo server and compute catalog for compatible ThinkSystem platforms and accessories.

Key Features

• 24 Cores / 48 Threads: 48 logical processors give the OS and hypervisor enough headroom to run a large VMS service, multiple analytics containers, and database processes concurrently without contention — relevant when a single ST650 V2 is carrying 64+ camera channels with edge analytics enabled.
• 2.1 GHz Base / 3.4 GHz Boost: The 1.3 GHz burst headroom means latency-sensitive decode tasks ramp quickly when a motion event spikes demand, then throttle back — useful in surveillance deployments where channel load is bursty rather than flat.
• Priority Core Architecture (8 High / 16 Low): High-priority cores clock at 2.3 GHz; efficiency cores run at 1.9 GHz. Schedulers that are priority-core-aware (Windows Server, RHEL 8+, VMware vSphere 7+) will route foreground tasks to the faster cores automatically, reducing the need to manually pin processes. This is the spec to verify if your VMS or analytics platform explicitly lists priority-core support.
• 36 MB L3 Cache: A 36 MB cache pool across 24 cores keeps frequently accessed frame buffers, model weights, and index structures close to compute — reducing main-memory round trips on analytics-heavy loads where repeated access patterns are common.
• 165W TDP: This is not a low-power part. At 165W, the ST650 V2's thermal and power delivery subsystems need to be provisioned accordingly — confirm your rack PDU circuit, UPS capacity, and server cooling configuration before deploying in a dense or thermally constrained environment.
• LGA 4189 Socket / 3rd Gen Intel Xeon Scalable: Platform-generation lock-in is real — LGA 4189 is specific to Ice Lake-SP Xeon Scalable. This processor is compatible with ST650 V2 motherboards designed for this socket; it will not drop into earlier or later Lenovo ThinkSystem generations.
• 11.2 GT/s System Bus: Higher system bus bandwidth supports memory-intensive workloads where the processor is pulling large data sets (video frames, AI model inference tensors) from DRAM at sustained rates. Pair with appropriate memory configuration for the ST650 V2 to avoid bus saturation.
• 10 nm Lithography: Intel's 10 nm Ice Lake-SP process gives better performance-per-watt than the previous 14 nm generation — meaningful when comparing this generation against older Xeon Scalable options in the same wattage band.

Integration and Compatibility

The 4XG7A72942 is engineered and validated for the Lenovo ThinkSystem ST650 V2 tower server. Lenovo processor options are factory-integrated or field-installed via the server's processor socket — confirm the ST650 V2 configuration guide for your specific chassis revision and motherboard stepping before ordering. Dual-processor ST650 V2 configurations require a second processor option and appropriate memory population. If you are running a network video recorder workload on the ST650 V2 platform, the 24-core count gives ample headroom for concurrent recording, analytics, and playback streams. For AI-based video analytics platforms that leverage Intel OpenVINO or similar inference frameworks, the Ice Lake-SP generation introduces DL Boost (VNNI instruction support), which can meaningfully accelerate INT8 inference compared to prior Xeon generations — verify with your analytics vendor whether this acceleration path is enabled in their software stack. Refer to server and compute options available for compatible ThinkSystem accessories and storage expansion.

Frequently Asked Questions

Q: What server is the Lenovo 4XG7A72942 compatible with?

A: The 4XG7A72942 is a processor option validated for the Lenovo ThinkSystem ST650 V2 tower server. It uses the LGA 4189 socket and is part of the 3rd Generation Intel Xeon Scalable (Ice Lake-SP) platform. It is not cross-compatible with earlier or later ThinkSystem generations that use different socket standards.

Q: What is the base and boost clock speed of the Xeon Gold 6338T in this kit?

A: The Intel Xeon Gold 6338T operates at 2.1 GHz base frequency with a maximum boost of 3.4 GHz. The processor also features a priority-core structure: 8 high-priority cores run at 2.3 GHz and 16 efficiency cores run at 1.9 GHz.

Q: How does the priority core architecture affect VMS or analytics workloads?

A: The 6338T splits its 24 cores into 8 high-priority cores (2.3 GHz) and 16 efficiency cores (1.9 GHz). Operating systems and hypervisors that are priority-core-aware — including Windows Server, RHEL 8+, and VMware vSphere 7+ — will schedule latency-sensitive tasks on the faster cores automatically. For VMS or analytics deployments, this means live decode and alert processing can get preferential core access without manual CPU affinity configuration.

Q: Is the 4XG7A72942 suitable for a multi-channel video analytics server?

A: Yes. The 24 cores and 48 threads provide substantial concurrent processing capacity. The Ice Lake-SP generation also supports Intel DL Boost (VNNI instructions), which can accelerate INT8 deep learning inference used by AI-based video analytics platforms — confirm with your analytics vendor whether their software leverages this capability.

Q: What is the TDP of this processor, and does it affect power planning?

A: The Xeon Gold 6338T has a 165W TDP. In a tower server like the ST650 V2, this requires appropriate circuit capacity at the rack PDU level and sufficient UPS headroom. In a dual-processor ST650 V2 configuration, plan for up to 330W of processor-only thermal draw before accounting for storage, memory, and peripheral loads.

Q: Can this processor be field-installed, or does it need to be factory-configured?

A: Lenovo processor options for the ThinkSystem ST650 V2 can be factory-installed at time of order or field-installed into a compatible server chassis by a qualified technician. Confirm the ST650 V2 chassis revision and motherboard stepping compatibility with Lenovo's configuration guide before field installation.