Quick Verdict
The Xeon 6516P-B balances core count, I/O, and on-die accelerators for edge and network platforms, making it a strong fit for single-socket appliances that need PCIe Gen 5 and integrated QuickAssist. General-purpose data-center buyers may prefer the LGA4710-based 6700/6500P series for socket flexibility.
Overview
Launch
2025
Status
LaunchedGeneration
6th Gen Xeon (Granite Rapids-D)
Market
Server/Network/Edge
The Intel Xeon 6516P-B is a 20-core, 40-thread server processor built on the Intel 3 process, part of the Xeon 6 family (Granite Rapids-D) with quad-channel DDR5, 48 PCIe lanes (CPCIe 5.0), and integrated accelerators for networking and edge workloads.
The Intel Xeon 6516P-B targets single-socket servers and edge appliances with 20 performance cores, up to 3.5 GHz boost, 80 MB L3 cache, and 145 W TDP. It supports quad-channel DDR5-4800 (up to 1.
13 TB), 48 PCIe lanes (32 Gen 5 + 16 Gen 4), and features Intel QuickAssist Technology, vRAN Boost, DSA, and AMX for networking and AI workloads.
Specifications
Performance
With 20 cores and robust I/O, the 6516P-B is well-suited for consolidating VMs, especially where QAT and DSA offload workloads.
Intel 3 and targeted single-socket design aim to improve performance-per-watt versus prior generations, but independent data is limited.
- •Intel AMX enabled for matrix operations.
- •AVX-512 with two FMA units per core.
- •Suited as a host CPU for GPU-accelerated AI and on-CPU inference.
Architecture
Intel 3
Process Node
Granite Rapids-D
Codename
20C / 40T
Core Config
80 MB
L3 Cache
145 W
TDP
Architecture Overview
Granite Rapids-D is Xeon 6’s performance-core microarchitecture tailored for single-socket server and edge platforms, fabricated on Intel 3 and packaged as an SoC with accelerators.
CPU Design
The 6516P-B uses 20 P-cores (no E-cores) with Hyper-Threading, a unified 80 MB L3 cache, and AVX-512 plus AMX instructions to improve throughput for vector and matrix workloads.【turn1fetch0】
Memory Subsystem
Quad-channel DDR5 memory up to 4800 MT/s supports up to 1.13 TB per system with ECC, enabling higher bandwidth and larger memory footprints than DDR4-based servers.【turn1fetch0】
PCIe & I/O
The CPU provides 48 PCIe lanes: 32 lanes of Gen 5 and 16 lanes of Gen 4, allowing fast NVMe storage, NICs, and accelerators without a separate PCH.【turn1fetch0】
Overclocking
The 6516P-B multiplier is locked; frequencies are managed via Intel Turbo Boost 2.0 and platform power policies.
- Shift to Intel 3 process improves efficiency over prior 14 nm and 10 nm server generations.
- PCIe Gen 5 lanes double bandwidth versus Gen 3.
- AMX and integrated accelerators reduce reliance on external cards for AI and networking.
Key Highlights
- 20 performance cores with Hyper-Threading
- Intel 3 manufacturing for better performance-per-watt
- Quad-channel DDR5-4800 with up to 1.13 TB support
- 48 PCIe lanes (32 Gen 5 + 16 Gen 4)
- Integrated Intel QuickAssist Technology
- Intel vRAN Boost for RAN workloads
- DSA and DLB accelerators on-die
- Intel AMX for AI inference workloads
- Comprehensive security features (TDX, SGX, TME)
- Strong I/O and accelerator set for edge appliances
- BGA4368 package is not socket-upgradeable
- No integrated graphics
- Locked multiplier
- Single-socket only
- Limited public benchmark data as of early 2026
History
Intel unveiled the Xeon 6 family with performance-cores on February 24, 2025, positioning it as a broad portfolio spanning data center, AI, and network/edge workloads.【turn5fetch0】 As part of this rollout, Intel introduced Granite Rapids-D variants like the 6516P-B that integrate accelerators directly into the CPU to meet telecom and edge appliance requirements. Built on the Intel 3 process, these SoCs reflect Intel’s shift toward higher performance-per-watt and specialized on-die accelerators for vRAN, security, and AI.
The BGA4368 package indicates a focus on embedded and single-socket platforms where long lifecycle and integration matter more than socket replacability.
Improvements over Previous Generation
- Shift to Intel 3 process improves efficiency over prior 14 nm and 10 nm server generations.
- PCIe Gen 5 lanes double bandwidth versus Gen 3.
- AMX and integrated accelerators reduce reliance on external cards for AI and networking.
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Building or upgrading single-socket edge/network servers that need PCIe Gen 5, DDR5, and built-in accelerators (QAT/vRAN Boost).
Avoid if…
- You require a socketed upgrade path (6516P-B is BGA4368).
- You need multi-socket scalability.
- Your workload depends heavily on unlocked overclocking.
Use Cases
Interesting Facts
The 6516P-B is part of Intel’s Xeon 6 Granite Rapids-D family, which uses BGA packages for embedded and edge designs.【turn1fetch0】【turn9fetch0】
It integrates both vRAN Boost and Intel QuickAssist Technology, reducing the need for offload cards in telecom gateways.【turn1fetch0】
Intel lists two AVX-512 FMA units per core, enhancing throughput for HPC and AI workloads.【turn1fetch0】
Max memory size is documented as 1.13 TB with DDR5-4800 across four channels.【turn1fetch0】
PCIe configuration includes 32 lanes of Gen 5 and 16 lanes of Gen 4 for mixed-speed devices.【turn1fetch0】
Launched alongside Xeon 6700P/6500P series in February 2025 as part of the broader Xeon 6 rollout.【turn5fetch0】
Supports Intel Trust Domain Extensions (TDX) for confidential computing use cases.【turn1fetch0】
Use Conditions specify Communications Commercial Temperature, indicating telecom-grade validation.【turn1fetch0】
Embedded options are available, enabling long lifecycle designs.【turn1fetch0】
Codenamed Granite Rapids-D, positioning it alongside other Xeon 6 SP/AP variants in Intel’s portfolio.【turn9fetch0】
People Also Ask
What is the TDP of the Xeon 6516P-B?
The TDP is 145 W according to Intel ARK.
Does the Xeon 6516P-B support DDR5?
Yes, it supports quad-channel DDR5 up to 4800 MT/s.
How many PCIe lanes does the Xeon 6516P-B have?
It has 48 PCIe lanes: 32 at Gen 5 and 16 at Gen 4.
Is the Xeon 6516P-B socketed?
No, it uses an FCBGA4368 package and is designed for soldered-down embedded/edge platforms.
What accelerators are integrated into the 6516P-B?
Intel QuickAssist Technology, vRAN Boost, DLB, and DSA are integrated, along with AMX support.
When did Intel launch the Xeon 6516P-B?
Intel announced Xeon 6 processors with P-cores on February 24, 2025; ARK lists Q1’25 launch.
What codename is the 6516P-B?
Intel ARK references 'Products formerly Granite Rapids-D.'
Does the Xeon 6516P-B have integrated graphics?
No, there is no integrated GPU; a discrete GPU is required if graphics output is needed.
What process node is the 6516P-B built on?
It is fabricated using Intel’s Intel 3 process.
Is the Xeon 6516P-B multiplier unlocked?
No, the processor does not feature an unlocked multiplier.
Frequently Asked Questions
What socket does the Xeon 6516P-B use?
It uses an FCBGA4368 package (BGA), meaning it is not socketed and is intended for integrated designs.
Can the Xeon 6516P-B be used in multi-socket systems?
No, Intel ARK specifies '1S Only' scalability.
Does the 6516P-B support ECC memory?
Yes, ECC memory is supported.
What is the maximum memory capacity?
Up to 1.13 TB dependent on memory type, per Intel ARK.
What is the maximum turbo frequency?
The maximum turbo frequency is 3.5 GHz.
Does it support Intel AMX?
Yes, Intel Advanced Matrix Extensions (AMX) are supported.
What is the base clock of the 6516P-B?
The processor base frequency is 2.3 GHz.
Does it support Intel vRAN Boost?
Yes, Intel vRAN Boost is included.
Is Optane persistent memory supported?
No, Intel Optane Persistent Memory is not supported.
What security features are present?
It includes TDX, SGX, TME (Multi-Key and Total), TXT, Boot Guard, and Mode-based Execute Control, among others.