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Intel Xeon 6515P vs Intel Xeon 6521P: Comparison
Intel Xeon 6515P and Intel Xeon 6521P differ on performance cores: Intel Xeon 6515P at 16, Intel Xeon 6521P at 24, which puts Intel Xeon 6521P ahead on that measure. They match on 19 other specifications, including product line, codename and release year. In SPECrate® 2017 Integer (base), 1-chip the Intel Xeon 6521P scores 307 against 192 for the Intel Xeon 6515P, a lead of 37%.
Specs
| Specification |  | |
|---|---|---|
| Product Line | Xeon | Xeon |
| Codename | Granite Rapids | Granite Rapids |
| Release Year | 2024 | 2024 |
| Market Segment | Server | Server |
| Socket | Other | Other |
| Socket Status | Current | Current |
| Process Node | 3 | 3 |
| Performance Cores | 16 | 24 |
| Efficiency Cores | 0 | 0 |
| SMT Enabled | Yes | Yes |
| P-Core Base Clock | 2.3 | 2.6 |
| P-Core Boost Clock | 3.7 | 4.0 |
| Unlocked Multiplier | No | No |
| L3 Cache | 32 MB-33% | 48 |
| Base Power | 145 | 175 |
| Memory Type | DDR5 | DDR5 |
| Memory Channels | 8 | 8 |
| Max Memory Capacity | 2048 | 2048 |
| ECC Support | Yes | Yes |
| Integrated Graphics | No | No |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Architecture | Granite Rapids | Granite Rapids |
| Socket Support | 1S/2S | 1S/2S |
| Max Memory | 2048 GB (8-channel DDR5-6400) | 2048 GB (8-channel DDR5-6400) |
| Cores | 16 | 24 |
| Threads | 32 | 48 |
Benchmarks
Measured results, not specifications. Percentages are the gap to the leading product in each test.
SPECrate® 2017 Integer (base), 1-chip
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
SPECrate 2017 Integer runs ten integer workloads, including a compiler, file compression, a chess engine and route planning, with one copy per hardware thread. The score is throughput against a fixed reference machine, so it reflects multi-core server and workstation work rather than gaming. Each figure is the best result a hardware vendor published on spec.org for a one-chip system, so the server, memory and compiler behind each chip differ.
SPECrate® 2017 Floating Point (base), 1-chip
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
SPECrate 2017 Floating Point runs thirteen scientific and engineering workloads, including weather and climate models, fluid dynamics, molecular dynamics and ray tracing, with one copy per hardware thread. It rewards core count, vector units and memory bandwidth, which is why server chips with many memory channels lead it. Each figure is the best result a hardware vendor published on spec.org for a one-chip system, so the server, memory and compiler behind each chip differ.
SPEC®, SPECrate® and SPECspeed® are registered trademarks of the Standard Performance Evaluation Corporation. Copied by permission of the Standard Performance Evaluation Corporation (SPEC). Results retrieved from www.spec.org on 23 Sept 2026.
Verdict
Intel Xeon 6515P
8.4 / 10 Expert Rating
The Intel Xeon 6515P is a well-balanced mainstream Xeon 6 P-core chip for general enterprise virtualization and database workloads.
Intel Xeon 6521P
8.4 / 10 Expert Rating
The Intel Xeon 6521P is a well-balanced mainstream Xeon 6 P-core chip for general enterprise virtualization and database workloads.