HPE INT Xeon-s 4416+ CPU for HPE OEM - P61447-B21

HPE P61447-B21 Intel Xeon Silver 4416+ 20-Core Server Processor

Overview

The HPE P61447-B21 is a factory-pulled Intel Xeon Silver 4416+ processor provisioned for HPE OEM server platforms. Built on Intel's Sapphire Rapids architecture with the FCLGA4677 socket, this 20-core CPU targets mid-tier rack servers handling mixed enterprise workloads — virtualization hosts, application servers, and data-intensive compute nodes where you need more cores than a basic dual-socket entry config but don't want to pay for Gold-tier thermal envelopes. This is a refurbished unit; cosmetic wear is possible, but the processor has been tested and is confirmed operational. P61447-B21 (often searched as P61447 B21) is HPE's OPN for this SKU, meaning it ships as an HPE-qualified component and is not a retail boxed Intel part.

Key Features

• 20 Cores, 2.00 GHz Base / 3.90 GHz Turbo: The wide core count handles dense VM stacks effectively — a hypervisor running 20 single-vCPU guests can pin one thread per core with no oversubscription. The 3.90 GHz turbo headroom means lightly threaded tasks (single-session RDP, SQL OLTP queries) still get competitive single-thread performance rather than idling at base clock.
• 37.5 MB L3 Cache: Large last-level cache reduces main-memory round-trips for working sets that fit within it — relevant for in-memory databases, caching tiers, and analytics workloads where DDR5 latency would otherwise be the bottleneck on repeated access patterns.
• DDR5-4000 Support, 8-Channel Memory Controller: Eight independent DDR5 channels running up to 4000 MT/s deliver substantial memory bandwidth compared to prior-generation DDR4 platforms. In practice this matters for memory-bandwidth-bound workloads: NUMA-aware VMs, large Java heaps, or security video analytics engines ingesting multiple high-resolution streams simultaneously. Note: full 4000 MT/s is the 1DPC (one DIMM per channel) ceiling; 2DPC configurations drop to a lower validated frequency.
• ECC Memory Support: Error-correcting memory is non-negotiable in server deployments. ECC catches and corrects single-bit errors silently, preventing the kind of silent data corruption or unexpected reboots that surface in non-ECC desktop-class builds running server workloads.
• AVX-512 / AVX2 / AMX Instruction Extensions: Intel Advanced Matrix Extensions (AMX) provide hardware acceleration for matrix multiply operations — the dominant compute pattern in AI inference and deep-learning training. If your workload includes on-server analytics, object classification, or any neural-network inference pipeline, AMX tiles can deliver significantly higher throughput than scalar or AVX2 paths without a discrete accelerator.
• 64-bit Instruction Set with SSE4.2: Full x86-64 compatibility means any enterprise software stack — VMware ESXi, Windows Server, RHEL, containerized Linux workloads — runs without recompilation or emulation overhead.
• FCLGA4677 Socket: This processor seats in Intel's fourth-generation Xeon Scalable socket, used across HPE ProLiant Gen11 platforms and other Sapphire Rapids server designs. Before ordering, verify your specific ProLiant model's QVL — not every Gen11 chassis ships with the same voltage regulator configuration.

Integration & Compatibility

The P61447-B21 is an HPE OEM part, qualified against HPE's server firmware and platform validation matrix. It is intended for HPE ProLiant platforms supporting the FCLGA4677 socket (Sapphire Rapids generation). Mixing processor generations or socket types within a chassis is not supported. For dual-socket configurations, both installed processors must be identical part numbers — mismatched SKUs are not supported by Intel or HPE firmware. DDR5 DIMMs must be validated against the specific ProLiant model's memory compatibility list; raw DDR5 modules from prior-generation suppliers are not guaranteed to train at rated speeds in all slot configurations.

This unit carries a 90-day operational warranty. There is no HPE manufacturer warranty on refurbished OEM processor units of this type — buyers requiring active HPE support contracts should provision new-build processors through an HPE Care Pack agreement instead.

Frequently Asked Questions

Q: What server platforms is the P61447-B21 compatible with?

A: The P61447-B21 uses the FCLGA4677 socket and is designed for HPE OEM platforms supporting Intel Sapphire Rapids (4th Gen Xeon Scalable) processors, such as applicable HPE ProLiant Gen11 servers. Always verify compatibility against HPE's QuickSpecs for your specific chassis model before installing.

Q: Is this a new or refurbished processor?

A: This unit is refurbished. It has been tested and confirmed operational. Cosmetic wear may be present. There is no HPE manufacturer warranty; a 90-day operational warranty applies.

Q: What memory type does the P61447-B21 support?

A: It supports DDR5 up to 4000 MT/s across 8 memory channels. The 4000 MT/s maximum applies to 1 DIMM per channel (1DPC) configurations; 2DPC configurations run at a lower validated speed. ECC is supported and required for server deployments.

Q: Can the P61447-B21 be used in a dual-socket server?

A: Yes, provided the target chassis supports dual FCLGA4677 sockets. Both processors in a dual-socket config must be the same part number — mixed SKU pairings are not supported.

Q: What is the warranty on the P61447-B21?

A: This refurbished unit carries a 90-day operational warranty. No HPE manufacturer warranty applies to this OEM refurbished component.

Q: Does the P61447-B21 support AI or machine learning workloads?

A: Yes. The Xeon Silver 4416+ includes Intel Advanced Matrix Extensions (AMX), which provide hardware-level acceleration for matrix multiply operations — the core compute pattern in AI inference and deep-learning workloads. For demanding AI training tasks, a Gold- or Platinum-tier Xeon with higher TDP and more cores may be more appropriate.

Ted Perry

I've deployed Sapphire Rapids processors across a range of ProLiant Gen11 chassis builds, and the P61447-B21 sits in a useful middle tier — the 20-core Xeon Silver 4416+ at 2.00 GHz base gives you meaningful thread density without the power and cost premium of a Gold 6400 series SKU. The key number to hold onto here is the 3.90 GHz turbo ceiling: in mixed-load environments where most VMs are lightly threaded, that headroom translates to snappy interactive performance even when aggregate CPU utilization looks modest on the dashboard.

Technical Highlights:

• AMX on a Silver-tier SKU: Intel Advanced Matrix Extensions landing in the Silver line means you can run lightweight inference workloads — think ONVIF-analytics offload, small classification models, or video metadata extraction — on the host CPU without provisioning a GPU. Don't expect training throughput, but for edge inference at moderate scale, this is a legitimate option.
• 8-Channel DDR5-4000: Eight memory channels is the full Sapphire Rapids memory bus. At 1DPC with DDR5-4000 DIMMs, aggregate bandwidth is substantial — relevant if you're running in-memory caching layers or video analytics pipelines that stream large frame buffers. Drop to 2DPC and validate the speed against HPE's QVL; you may land at DDR5-3200 depending on DIMM density.
• 37.5 MB L3 Cache: For a 20-core part, 37.5 MB works out to just under 2 MB per core — enough to absorb moderate working sets per VM. Compare this to entry Xeon Bronze parts where cache-per-core drops meaningfully; this ratio matters for database query engines that re-scan the same index pages repeatedly.

Deployment Considerations:

• This is an HPE OEM part — it will not appear in Intel's boxed processor database and carries HPE firmware hooks. It seats correctly only in validated HPE ProLiant FCLGA4677 platforms; pull the Gen11 QuickSpecs for your specific chassis before purchasing, especially for blade/modular form factors where TDP constraints differ from tower/rack.
• Refurbished processor: the 90-day warranty window is short for a production server deployment. Plan accordingly — either pair with a chassis under active HPE support coverage or maintain a spare processor in inventory for critical uptime SLAs.

The P61447-B21 is the right call for a cost-conscious Gen11 ProLiant refresh where you need 20 threads per socket, DDR5 bandwidth, and AMX capability without stepping up to Gold-tier acquisition cost — well-suited for virtualization consolidation nodes or analytics-adjacent workloads where budget is the binding constraint.