Quick Verdict
A strong 16‑core Granite Rapids‑SP CPU for single‑socket servers and workstations, offering excellent memory bandwidth, PCIe 5.0, and AMX/AVX‑512 acceleration, but with a 150 W TDP and a price that only makes sense in platforms that fully exploit its I/O and memory.
Overview
Launch
2025
Status
LaunchedGeneration
Xeon 6 (Granite Rapids‑SP)
Market
1P/2P Server, High‑End Workstation
The Intel Xeon 6515P is a 16‑core, 32‑thread server and workstation processor from Intel’s Xeon 6 Granite Rapids‑SP family, built on Intel 3 chiplets with 72 MB of L3 cache, 8‑channel DDR5‑6400, and 88 PCIe 5.0 lanes, targeting single‑socket and dual‑socket compute‑intensive workloads.
With 16 P‑cores, 32 threads, 72 MB of L3, 8‑channel DDR5‑6400, and 88 PCIe 5.0 lanes, the Xeon 6515P is built for demanding server and workstation workloads in a single socket. Its Intel 3 chiplet design and Redwood Cove cores deliver solid single‑threaded performance and strong multi‑threaded throughput, especially for databases, virtualization, and AI inference.
The 150 W TDP is manageable in 1U servers with good cooling, but you’re paying for I/O and memory capacity that only makes sense if your workload actually uses them.
Specifications
Performance
Strong multi‑threaded integer and throughput performance; SPEC CPU2017 integer rate around 19000–19500 for 1P configurations shows excellent server throughput.
Excellent for consolidating VMs on a single socket thanks to high core count, memory bandwidth, and VT‑x/VT‑d/EPT support.
Capable for light GPU‑accelerated tasks, but not a gaming‑first CPU; most gaming workloads don’t exploit its I/O and memory advantages.
Intel 3 improves efficiency over 14 nm Xeons, but 150 W TDP for 16 cores is still higher than some 5th‑gen EPYC alternatives.
- •Not designed for gaming; single‑threaded performance is good but not class‑leading.
- •High PCIe lane count is overkill for most gaming GPUs.
- •Better suited as a host CPU for GPU‑accelerated game servers or cloud gaming.
- •AMX and AVX‑512 provide strong CPU‑based AI acceleration.
- •Best suited for inference and small‑to‑medium models; not a replacement for GPUs in large‑scale training.
- •Popular for LLM inference on CPU‑only stacks and OpenVINO‑optimized workloads.
Architecture
Intel 3 (compute dies)
Process Node
Granite Rapids
Codename
16C / 32T
Core Config
72 MB
L3 Cache
150 W
TDP
Architecture Overview
The Xeon 6515P is part of Intel’s Granite Rapids‑SP family, which uses a chiplet design with compute dies on the Intel 3 process and separate I/O dies. Redwood Cove P‑cores bring improved branch prediction and larger L1 instruction caches compared to earlier Xeons, while retaining AVX‑512 and adding AMX for matrix workloads.
CPU Design
16 Redwood Cove P‑cores with 2 MB L2 per core and a 72 MB shared L3 cache distributed across the mesh. The chip uses Intel’s mesh interconnect to keep latency low and bandwidth high between cores, memory controllers, and PCIe controllers.
Memory Subsystem
8‑channel DDR5‑6400 memory controllers are located on the compute dies, delivering up to 4 TB capacity per socket and very high sustained bandwidth for memory‑bound workloads.
PCIe & I/O
88 PCIe 5.0 lanes are exposed from the package, allowing multiple high‑end GPUs, NVMe SSDs, and SmartNICs in a single socket. Multi‑socket configurations can scale total lane count further.
Overclocking
The multiplier is locked; frequency is managed by Intel Turbo Boost 2.0 and platform power limits. There is no manual overclocking headroom.
- Intel 3 process vs 14 nm, improving performance and efficiency.
- Higher DDR5 speed (6400 vs 4800 MT/s) and more channels (8 vs 8 but with higher bandwidth).
- More PCIe lanes (88 vs 80) and PCIe 5.0 vs 4.0.
- AMX and enhanced AVX‑512 vs AVX‑512 only.
Key Highlights
- 16 P‑cores with strong single‑threaded performance
- 88 PCIe 5.0 lanes for dense GPU/NVMe configs
- 8‑channel DDR5‑6400 with up to 4 TB capacity
- AMX + AVX‑512 for AI and HPC
- Good single‑socket performance without dual‑socket complexity
- 150 W TDP may require strong cooling in 1U servers
- Premium price for I/O and memory that only matters if you use them
- No integrated graphics
- Locked multiplier, no manual overclocking
History
The Xeon 6515P emerged as part of Intel’s Granite Rapids‑SP rollout in early 2025, filling the 16‑core niche in the Xeon 6 6500P line. It targets customers who want modern P‑core performance and PCIe 5.0 density without jumping to the larger Xeon 6900P socket.
Early systems from Dell, HPE, and others adopted the 6515P for single‑socket servers aimed at virtualization, databases, and AI inference. As cloud providers roll out Granite Rapids‑based instances, the 6515P represents a balanced midpoint between lower‑core E‑parts and larger 86‑core P‑core SKUs, offering enough I/O and memory bandwidth for many workloads while keeping socket complexity low.
Improvements over Previous Generation
- Intel 3 process vs 14 nm, improving performance and efficiency.
- Higher DDR5 speed (6400 vs 4800 MT/s) and more channels (8 vs 8 but with higher bandwidth).
- More PCIe lanes (88 vs 80) and PCIe 5.0 vs 4.0.
- AMX and enhanced AVX‑512 vs AVX‑512 only.
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Single‑socket servers or workstations that need maximum memory bandwidth, many PCIe 5.0 lanes, and AMX/AVX‑512 for AI or HPC.
Avoid if…
- Building a pure gaming PC
- Workloads that don’t benefit from >64 GB RAM or >40 PCIe lanes
- TDP‑sensitive platforms that cannot cool 150 W per socket
Use Cases
Interesting Facts
The 6515P uses Intel’s chiplet Xeon 6 design with separate compute and I/O dies on Intel 3.
SPEC CPU2017 integer rate results for 1P 6515P servers are around 19000–19500, indicating strong throughput.
It targets the same LGA4710 socket as Xeon 6700E (Sierra Forest) but with P‑cores instead of E‑cores.
Cloud providers use Granite Rapids‑SP CPUs like this for r8i‑class instances optimized for compute‑heavy workloads.
The 88‑lane PCIe 5.0 configuration is notably higher than typical mainstream desktop CPUs.
Redwood Cove cores are an evolution of the Golden Cove/Raptor Cove architecture from Meteor Lake, adapted for server workloads.
Intel’s Xeon 6000P series can scale from 16 up to 86 P‑cores in the same socket family.
AMX on Xeon 6 is tuned for BF16 and INT8 inference, making these CPUs competitive for CPU‑only AI stacks.
Granite Rapids‑SP was announced as part of Intel’s Xeon 6 Performance‑core rollout in early 2025.
OVH and other providers use Xeon 6515P‑class CPUs in single‑socket Scale servers for HPC, AI inference, and databases.
People Also Ask
Is Intel Xeon 6515P good for virtualization?
Yes. With 16 cores, 32 threads, 8‑channel DDR5, and VT‑x/VT‑d/EPT, it is excellent for consolidating VMs on a single socket.
How much memory does Xeon 6515P support?
Up to 4 TB of DDR5‑6400 in an 8‑channel configuration, depending on the DIMM types and population rules.
How many PCIe lanes does Xeon 6515P have?
88 PCIe 5.0 lanes directly from the CPU, which is very high for a single‑socket server or workstation.
Is Xeon 6515P good for AI inference?
It is a strong CPU for AI inference thanks to AMX and AVX‑512, especially for LLMs and vision models on CPU‑only or OpenVINO‑based stacks.
Does Xeon 6515P have integrated graphics?
No, it has no integrated GPU. You need a discrete GPU or ASPEED‑style BMC for display.
What socket does Xeon 6515P use?
FCLGA4710, the same LGA4710 socket used by other Xeon 6700E / 6500P / 6700P processors.
Can Xeon 6515P be overclocked?
No. The multiplier is locked; frequency is controlled by Intel Turbo Boost 2.0 and platform power limits.
Is Xeon 6515P better than EPYC 9115?
It depends. The 6515P offers more PCIe lanes and AMX; EPYC 9115 typically has better power efficiency and more memory channels. For heavy I/O and AI on Intel stacks, 6515P can be better; for pure throughput per watt, EPYC 9115 often wins.
What process node is Xeon 6515P built on?
Its compute dies use Intel’s Intel 3 process, while the I/O dies are on a different, older node.
Is Xeon 6515P suitable for gaming?
It can game, but it is overkill and not cost‑effective. Gaming workloads don’t fully use its I/O and memory bandwidth; mainstream desktop CPUs are usually a better value.
Frequently Asked Questions
What is the Xeon 6515P’s TDP?
150 W. This is the standard TDP for the SKU; actual power can be higher under heavy all‑core load depending on BIOS settings.
Does Xeon 6515P support ECC memory?
Yes. Intel’s specs list ECC DDR5 support, which is essential for server and workstation data integrity.
What generation is Xeon 6515P?
It belongs to Intel’s Xeon 6 family, Granite Rapids‑SP generation, using Redwood Cove P‑cores on the Intel 3 process.
Can Xeon 6515P run Windows 11?
Yes, with a compatible chipset and BIOS. However, for servers, Linux is more common; for workstations, both Windows and Linux are supported.
What chipsets work with Xeon 6515P?
Server platforms using the Intel C7400 series chipset (Birch Stream) for Xeon 6 6500P/6700P are designed for this CPU.
Is Xeon 6515P unlocked for overclocking?
No. The CPU multiplier is locked; you cannot manually overclock it beyond Intel Turbo Boost behavior.
How does Xeon 6515P compare to Xeon 6511P?
The 6515P has a higher all‑core turbo (3.8 GHz vs 4.2 GHz peak on 6511P but lower base), while 6511P can reach 4.2 GHz on a few cores. Choose based on whether you prefer sustained all‑core frequency or single‑core peaks.
Is Xeon 6515P good for databases?
Yes. 8‑channel DDR5‑6400 and large L3 cache make it well suited for in‑memory databases and analytics workloads.
Does Xeon 6515P support CXL?
Xeon 6 supports CXL 2.0 on the platform level; whether CXL is exposed depends on the server motherboard and firmware.
What cooling is recommended for Xeon 6515P?
A high‑performance air cooler or 240 mm+ AIO in workstation chassis; for 1U servers, a robust passive heatsink with strong chassis airflow is required.