Lenovo 4XG7A15870 Xeon Platinum 8268 W/o FAN

Lenovo 4XG7A15870 Intel Xeon Platinum 8268 24-Core Server Processor

Overview

The Lenovo 4XG7A15870 is a factory-new Intel Xeon Platinum 8268 processor option kit for Lenovo ThinkSystem servers, delivering 24 physical cores and 48 threads on the second-generation Intel Xeon Scalable platform. At a 2.9 GHz base clock with a 3.9 GHz Turbo Boost ceiling and a 36 MB L3 cache, this processor is aimed at compute-dense server workloads — virtualization hosts, data analytics, and high-throughput application servers — where core density and sustained clock speed both matter. This is a tray/OEM option kit: it ships without a heatsink or cooling assembly, so budget and plan for a compatible Lenovo heatsink before installation.

Key Features

• 24 Cores / 48 Threads: The Platinum 8268 fits the full 24-core count into a single LGA 3647 socket, giving a two-socket ThinkSystem server 48 physical cores and 96 threads from two CPUs alone. That core density is the primary reason integrators choose this SKU for VMware ESXi or Hyper-V hosts where VM-to-core ratios drive licensing costs.
• 2.9 GHz Base / 3.9 GHz Boost: The 1 GHz spread between base and turbo means lightly-threaded workloads — single-threaded database queries, legacy application logic — get meaningful frequency headroom, while all-core workloads settle at a predictable 2.9 GHz floor. No guessing on sustained throughput under full load.
• 36 MB L3 Cache: A 36 MB last-level cache reduces memory-access latency on working sets that fit within it — relevant for in-memory databases, real-time analytics pipelines, and VMS servers managing large numbers of concurrent video streams where repeated data access patterns are common.
• 205 W TDP: At 205 W thermal design power, this is a high-wattage processor — each populated socket draws up to 205 W under sustained load. Confirm your ThinkSystem server's power supply capacity and cooling infrastructure before deploying, particularly in two-socket configurations where combined CPU TDP alone reaches 410 W.
• 48 Logical Threads (Hyper-Threading): Intel Hyper-Threading presents 48 logical processors to the OS from 24 physical cores. For workloads that benefit from concurrent thread scheduling — virtualization, parallel query execution, multi-session terminal services — this doubles the apparent thread count without additional hardware.
• LGA 3647 (Socket P), 2nd Gen Xeon Scalable (Cascade Lake): The Cascade Lake stepping (B1) on 14nm places this processor in Lenovo's ThinkSystem servers that support 2nd Generation Intel Xeon Scalable CPUs. Verify your specific ThinkSystem model's compatibility matrix before ordering — not all LGA 3647 boards support the full Platinum 8000 series at every TDP.
• UPI Interconnect: Ultra Path Interconnect (UPI) is the processor-to-processor fabric in two-socket configurations. UPI replaces the older QPI bus and provides lower latency and higher bandwidth between sockets — meaningful for workloads with significant cross-NUMA memory traffic.
• 64-Bit Operating Mode: Supports standard 64-bit OS environments including Windows Server, RHEL, SLES, and VMware ESXi — no compatibility concerns on modern enterprise operating systems.
• No Cooler Included: The 4XG7A15870 ships as a processor-only option kit. A separate Lenovo-compatible heatsink rated for 205 W TDP is required. Do not attempt installation without confirming the cooling solution's TDP rating — undersized cooling on a 205 W processor will trigger thermal throttling under load.

Integration and Compatibility

The 4XG7A15870 targets Lenovo ThinkSystem servers built on the 2nd Generation Intel Xeon Scalable platform with LGA 3647 (Socket P) sockets. Typical deployment targets include the ThinkSystem SR650, SR550, SR630, SR850, and SR950 series, though always cross-reference Lenovo's official ServerProven compatibility guide for your exact chassis model and firmware revision before purchasing. The Cascade Lake B1 stepping may require a BIOS update on servers originally shipped with 1st Generation Xeon Scalable (Skylake) support — check current BIOS release notes for your chassis. In two-socket configurations, both processors must be identical for stable operation; mismatched stepping or frequency between sockets is not supported. Memory population rules remain governed by the server chassis, not the CPU alone — consult the server's memory configuration guide for channel and DIMM slot requirements when populating alongside this processor.

Frequently Asked Questions

Q: Does the Lenovo 4XG7A15870 include a heatsink or cooling fan?

A: No. The 4XG7A15870 ships as a processor-only option kit — no heatsink, fan, or thermal solution is included. A separate Lenovo-compatible cooling assembly rated for 205 W TDP must be ordered and installed before the system is powered on.

Q: What socket does the 4XG7A15870 use?

A: The Xeon Platinum 8268 uses the LGA 3647 (Socket P) interface. This socket is specific to Intel's Xeon Scalable platform — it is not compatible with consumer or HEDT desktop sockets.

Q: Is the 4XG7A15870 compatible with 1st Generation Xeon Scalable ThinkSystem servers?

A: The Platinum 8268 is a 2nd Generation Intel Xeon Scalable (Cascade Lake) processor. Some ThinkSystem platforms support both generations via BIOS updates, but compatibility is server-model-specific. Always verify against Lenovo's ServerProven list for your exact chassis and firmware version.

Q: What is the TDP of the Xeon Platinum 8268?

A: The rated Thermal Design Power is 205 W. In a two-socket server configuration, both populated sockets together draw up to 410 W at CPU TDP — factor this into your power supply and cooling capacity planning.

Q: Can two 4XG7A15870 processors be installed in a dual-socket ThinkSystem server?

A: Yes, provided the server platform supports dual-socket Xeon Scalable configurations. Both installed processors must be identical in model, stepping, and frequency. Mixed-processor configurations in the same chassis are not supported by Intel or Lenovo for this platform.

Q: What is the maximum Turbo Boost frequency of the Xeon Platinum 8268?

A: The processor boosts to a maximum of 3.9 GHz under lightly-threaded workloads. Under full 24-core load, sustained frequency will be at or near the 2.9 GHz base clock.

Karl Wilson

The 4XG7A15870 is worth understanding clearly before you order: it is a processor option kit, not a standalone product, and the 205 W TDP is the detail that most often trips up first-time deployments of this chip. I have seen racks spec'd for Platinum 8268 dual-socket builds where the cooling kits were ordered for 150 W standard heatsinks — everything looked fine until the server hit sustained load and thermal throttling dropped all-core frequency. Specify the high-performance heatsink from Lenovo's options list if your workload keeps all 24 cores busy.

Technical Highlights:

• 24 Cores / 48 Threads at LGA 3647: In a dual-socket ThinkSystem SR650, this gives you 48 physical cores and 96 logical processors — a meaningful VM density advantage for VMware environments where per-core licensing is a real cost factor.
• 3.9 GHz Turbo Boost: The 1 GHz gap from base to boost is useful for mixed workloads where some threads run light while others run heavy — the scheduler parks idle threads and boosts active ones without manual configuration.
• 36 MB L3 Cache: For VMS NVR server deployments running analytics on a high channel count, the larger L3 reduces repeated main-memory fetches on working sets that stay warm — latency-sensitive decode pipelines benefit noticeably compared to lower-cache SKUs in the same family.

Deployment Considerations:

• This SKU ships without a cooler — plan for a Lenovo-compatible 205 W heatsink in your BOM before the chassis arrives on-site. Installing without a rated cooling solution risks CPU damage and voids support coverage.
• Cascade Lake B1 stepping may require a BIOS update on ThinkSystem servers that originally shipped with Skylake (1st Gen) processors. Pull the latest firmware package from Lenovo's support portal before seating the CPU.

The 4XG7A15870 is the right call for a high-density Lenovo ThinkSystem virtualization host or a compute-heavy VMS analytics server where you need 24 cores per socket and the platform is already standardized on LGA 3647 Cascade Lake infrastructure.