HPE INT Xeon-g 5418Y CPU for HPE OEM - P61448-B21

HPE P61448-B21 Intel Xeon Gold 5418Y 24-Core Server Processor Upgrade

Overview

The HPE P61448-B21 is a 4th Gen Intel Xeon Gold 5418Y processor upgrade designed for HPE OEM server platforms. Clocked at 2.00 GHz base with a 3.80 GHz boost, this 24-core, 48-thread Sapphire Rapids chip targets compute-dense workloads — virtualization hosts, analytics servers, and high-throughput enterprise infrastructure — where thread count and memory bandwidth matter more than raw single-core frequency. If you are speccing a multi-socket HPE server refresh and need a processor that balances core density with a manageable 185W TDP, the P61448-B21 (often searched as P61448 B21) warrants a close look before stepping up to the higher-TDP Gold or Platinum tiers.

This is an OEM-packaged part, sourced and validated for HPE server integration — not a boxed retail unit. That distinction matters at scale: HPE OEM processors ship with the firmware and BIOS compatibility pre-validated for HPE ProLiant and Synergy platforms using the LGA-4677 socket, reducing the risk of a time-consuming compatibility negotiation during a data center refresh.

Key Features

• 24 Cores / 48 Threads: The tetracosa-core configuration handles 48 simultaneous threads — meaningful for hypervisor hosts running large VM counts or containerized workloads where per-core licensing costs make core density directly relevant to software spend.
• 2.00 GHz Base / 3.80 GHz Boost: The 2 GHz base is conservative by design, keeping sustained power draw predictable under mixed loads. The 3.80 GHz boost handles latency-sensitive bursts — database queries, analytics jobs, short-duration compute spikes — without requiring constant full-chip power draw.
• 45 MB L3 Cache: A 45 MB last-level cache reduces main-memory round trips for working datasets that fit within cache bounds. For in-memory databases or analytics engines processing repeated data structures, this directly translates to lower latency and higher throughput without tuning.
• DDR5-4400 / PC5-35200 Support, up to 4 TB: DDR5 at 4400 MT/s delivers roughly double the peak bandwidth of DDR4-3200. Paired with a maximum supported memory footprint of 4 TB, this matters on large-scale virtualization hosts or in-memory workloads where memory bandwidth — not compute — is the bottleneck.
• 185W Thermal Design Power: At 185W TDP, this processor sits in the mid-range of the Xeon Gold 5400 family's power envelope. Plan cooling accordingly — HPE server platforms spec'd for this socket are designed around this thermal budget, but verify your rack's per-U power allocation before ordering multiple units for a dense deployment.
• Intel Virtualization Technology (VT-x): Hardware-assisted virtualization is enabled, supporting hypervisors including VMware ESXi, Microsoft Hyper-V, and KVM without software emulation overhead. This is table-stakes for any VM-centric deployment, but worth confirming when substituting processors mid-lifecycle.
• Socket LGA-4677 (4th Gen Intel Xeon Scalable): The Sapphire Rapids LGA-4677 platform is HPE's current-generation server socket, providing a clear upgrade path within the same socket generation and a known-good ecosystem of validated memory, NIC, and storage combinations for HPE ProLiant platforms.
• 94°C Thermal Specification: The 201.2°F (94°C) junction temperature ceiling gives adequate headroom under sustained load in properly cooled server chassis. If your data center runs ambient temperatures above 25°C or the server chassis airflow is restricted, validate thermal margins with HPE's thermal configurator before finalizing the deployment.

Integration & Compatibility

The P61448-B21 is validated for HPE server platforms using the Intel LGA-4677 socket — the same socket shared across 4th Gen Intel Xeon Scalable (Sapphire Rapids) and select 5th Gen (Emerald Rapids) processor families depending on HPE platform support matrices. Before installing this upgrade, confirm the target HPE server model and BIOS revision against HPE's QuickSpecs or System Memory Configurator for the specific ProLiant or Synergy chassis. Memory must be DDR5 SDRAM; existing DDR4 DIMMs are not compatible with this platform. Maximum supported memory across the platform is 4 TB — achievable with high-density DDR5 RDIMMs or LRDIMMs depending on the server's DIMM slot count and HPE-validated memory list.

Frequently Asked Questions

Q: What HPE server platforms is the P61448-B21 compatible with?

A: The P61448-B21 uses the Intel LGA-4677 socket and is validated for HPE OEM server platforms supporting 4th Gen Intel Xeon Scalable processors. Confirm your specific ProLiant or Synergy chassis model against HPE's QuickSpecs before ordering — not all LGA-4677 platforms support every SKU in the Xeon Gold 5400 family.

Q: Does the P61448-B21 support DDR4 memory?

A: No. The Xeon Gold 5418Y on the LGA-4677 platform requires DDR5 SDRAM (DDR5-4400 / PC5-35200). Existing DDR4 DIMMs are not compatible. Plan for a full memory platform upgrade if migrating from a prior-generation HPE server.

Q: What is the TDP of the P61448-B21 and what does that mean for my rack power budget?

A: The processor carries a 185W Thermal Design Power rating. This is the sustained power draw under typical workloads — plan your per-U power allocation and cooling accordingly, especially in high-density configurations with multiple processors per chassis.

Q: Is the P61448-B21 an OEM part and does it include a heatsink?

A: Yes, this is an OEM-packaged processor upgrade intended for HPE server integration. OEM parts typically do not include a retail heatsink — heatsink and thermal interface are provided by the HPE server chassis. Confirm with HPE's parts documentation for your specific server model.

Q: How many virtual machines can this processor support?

A: VM capacity depends on the hypervisor, VM sizing, and workload profile — not just the processor. The 5418Y provides 24 cores and 48 threads, which supports a significant VM density on a properly provisioned host. Combine with maximum supported DDR5 memory (up to 4 TB per platform) for memory-intensive virtualization environments.

Karl Wilson

The P61448-B21 is one of those processor upgrades that looks straightforward on a spec sheet but has a few deployment details worth getting right before you pull the trigger. The 185W TDP is the number I'd anchor on first — at that power envelope, chassis airflow and per-socket power delivery need to be pre-validated, not assumed, especially in dense HPE ProLiant configurations running dual sockets.

Technical Highlights:

• 24C / 48T at 2.00–3.80 GHz: The base-to-boost spread of 1.8 GHz gives the scheduler room to manage mixed steady-state and burst workloads without aggressive power state thrashing — useful on hypervisor hosts where predictable latency matters more than peak throughput.
• 45 MB L3 Cache: For analytics or caching workloads where the hot dataset fits inside 45 MB, the reduction in DRAM round trips is measurable. This is a larger cache than prior-generation Xeon Gold equivalents in the 5300 family.
• DDR5-4400, 4 TB max: DDR5 at 4400 MT/s is a genuine step up in memory bandwidth over DDR4. The 4 TB platform ceiling means this processor can anchor a serious in-memory database or large-VM-count host without memory becoming the constraint.

Deployment Considerations:

• This is OEM-packaged for HPE platforms — validate the target server model and BIOS version against HPE QuickSpecs before ordering. The LGA-4677 socket is shared with select 5th Gen Xeon SKUs, but firmware compatibility is not automatic across generations.
• The 94°C junction temperature limit is the hard ceiling, not a target operating point. In data centers running above 25°C ambient or with restricted chassis airflow, model the thermal delta carefully — there is less margin than the spec implies under sustained all-core load at 185W.

For an HPE ProLiant DL380 Gen11 or similar dual-socket platform being provisioned as a VMware ESXi host for a security operations center or enterprise video analytics workload, the 5418Y's 24-core density and DDR5 bandwidth make it a credible fit — provided cooling infrastructure and per-socket power are sized to match.