Xeon 6520P vs Xeon 6521P
Xeon 6520P
Xeon 6521P
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon 6520P
Performance Per Dollar Xeon 6521P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon 6520P | Xeon 6521P |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($1,295) | ✅ More affordable ($1,250) |
| Longevity | ✨ Modern (Granite Rapids (2024−2025) / Intel 3 nm) | ✨ Modern (Granite Rapids (2024−2025) / Intel 3 nm) |
💎 Value Proposition
| Insight | Xeon 6520P | Xeon 6521P |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+5%) |
| Upfront Cost | ⚠️ Higher cost ($1,295) | ✅ More affordable ($1,250) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Xeon 6520P and Xeon 6521P
Xeon 6520P
The Xeon 6520P is manufactured by Intel. It was released in 24 February 2025 (less than a year ago). It is based on the Granite Rapids (2024−2025) architecture. It features 24 cores and 48 threads. Base frequency is 2.4 GHz, with boost up to 4 GHz. L3 cache: 144 MB (total). L2 cache: 2 MB (per core). Built on Intel 3 nm process technology. Socket: LGA4710. Thermal design power (TDP): 210 Watt. Memory support: DDR5(6400MT/s). Passmark benchmark score: 64,010 points. Launch price was $1,295.
Xeon 6521P
The Xeon 6521P is manufactured by Intel. It was released in 24 February 2025 (less than a year ago). It is based on the Granite Rapids (2024−2025) architecture. It features 24 cores and 48 threads. Base frequency is 2.6 GHz, with boost up to 4.1 GHz. L3 cache: 144 MB (total). L2 cache: 2 MB (per core). Built on Intel 3 nm process technology. Socket: LGA4710. Thermal design power (TDP): 225 Watt. Memory support: DDR5(6400MT/s). Passmark benchmark score: 64,761 points. Launch price was $1,250.
Processing Power
Both the Xeon 6520P and Xeon 6521P share an identical 24-core/48-thread configuration. Boost clocks reach 4 GHz on the Xeon 6520P versus 4.1 GHz on the Xeon 6521P — a 2.5% clock advantage for the Xeon 6521P (base: 2.4 GHz vs 2.6 GHz). Both are built on the Granite Rapids (2024−2025) architecture using a Intel 3 nm process. In PassMark, the Xeon 6520P scores 64,010 against the Xeon 6521P's 64,761 — a 1.2% lead for the Xeon 6521P. Both processors carry 144 MB (total) of L3 cache.
| Feature | Xeon 6520P | Xeon 6521P |
|---|---|---|
| Cores / Threads | 24 / 48 | 24 / 48 |
| Boost Clock | 4 GHz | 4.1 GHz+2% |
| Base Clock | 2.4 GHz | 2.6 GHz+8% |
| L3 Cache | 144 MB (total) | 144 MB (total) |
| L2 Cache | 2 MB (per core) | 2 MB (per core) |
| Process | Intel 3 nm | Intel 3 nm |
| Architecture | Granite Rapids (2024−2025) | Granite Rapids (2024−2025) |
| PassMark | 64,010 | 64,761+1% |
| Geekbench 6 Single | 1,900 | — |
| Geekbench 6 Multi | 25,000 | — |
Memory & Platform
Both processors use the LGA4710 socket with PCIe 5.0. Maximum memory speed reaches DDR5-6400 on the Xeon 6520P versus 6400 on the Xeon 6521P — the Xeon 6521P supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon 6521P supports up to 4096 of RAM compared to 4 TB — 199.6% more capacity for professional workloads. Both feature 8-channel memory with ECC support. PCIe lanes: 88 (Xeon 6520P) vs 136 (Xeon 6521P) — the Xeon 6521P offers 48 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FCLGA4710 (Xeon 6520P) and C741 (Xeon 6521P).
| Feature | Xeon 6520P | Xeon 6521P |
|---|---|---|
| Socket | LGA4710 | LGA4710 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-6400 | 6400+127900% |
| Max RAM Capacity | 4 TB+104857500% | 4096 |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 88 | 136+55% |
Advanced Features
Neither processor supports overclocking. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support VT-x, VT-d virtualization. Primary use case: Xeon 6520P targets Server. Direct competitor: Xeon 6520P rivals EPYC 9254; Xeon 6521P rivals EPYC 9354.
| Feature | Xeon 6520P | Xeon 6521P |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | VT-x, VT-d |
| Target Use | Server | — |
Value Analysis
The Xeon 6520P launched at $1295 MSRP, while the Xeon 6521P debuted at $1250. At current prices ($1295 vs $1250), the Xeon 6521P is $45 cheaper. In terms of value (PassMark points per dollar), the Xeon 6520P delivers 49.4 pts/$ vs 51.8 pts/$ for the Xeon 6521P — making the Xeon 6521P the 4.7% better value option.
| Feature | Xeon 6520P | Xeon 6521P |
|---|---|---|
| MSRP | $1295 | $1250-3% |
| Avg Price (30d) | $1295 | $1250-3% |
| Performance per Dollar | 49.4 | 51.8+5% |
| Release Date | 2025 | 2025 |
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