Xeon w9-3475X vs Xeon 6521P
Xeon w9-3475X
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 w9-3475X
Performance Per Dollar Xeon 6521P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($3,930) | ✅ More affordable ($1,250) |
| Longevity | ✨ Modern (Sapphire Rapids (2023−2024) / Intel 7 nm) | ✨ Modern (Granite Rapids (2024−2025) / Intel 3 nm) |
💎 Value Proposition
| Insight | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+213%) |
| Upfront Cost | ⚠️ Higher cost ($3,930) | ✅ 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 w9-3475X and Xeon 6521P
Xeon w9-3475X
The Xeon w9-3475X is manufactured by Intel. It was released in 15 February 2023 (2 years ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 36 cores and 72 threads. Base frequency is 2.2 GHz, with boost up to 4.8 GHz. L3 cache: 82.5 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 300 Watt. Memory support: DDR5-4800. Passmark benchmark score: 65,077 points. Launch price was $3,739.
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
The Xeon w9-3475X packs 36 cores / 72 threads, while the Xeon 6521P offers 24 cores / 48 threads — the Xeon w9-3475X has 12 more cores. Boost clocks reach 4.8 GHz on the Xeon w9-3475X versus 4.1 GHz on the Xeon 6521P — a 15.7% clock advantage for the Xeon w9-3475X (base: 2.2 GHz vs 2.6 GHz). The Xeon w9-3475X uses the Sapphire Rapids (2023−2024) architecture (Intel 7 nm), while the Xeon 6521P uses Granite Rapids (2024−2025) (Intel 3 nm). In PassMark, the Xeon w9-3475X scores 65,077 against the Xeon 6521P's 64,761 — a 0.5% lead for the Xeon w9-3475X. L3 cache: 82.5 MB on the Xeon w9-3475X vs 144 MB (total) on the Xeon 6521P.
| Feature | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| Cores / Threads | 36 / 72+50% | 24 / 48 |
| Boost Clock | 4.8 GHz+17% | 4.1 GHz |
| Base Clock | 2.2 GHz | 2.6 GHz+18% |
| L3 Cache | 82.5 MB | 144 MB (total)+75% |
| L2 Cache | 2 MB (per core) | 2 MB (per core) |
| Process | Intel 7 nm | Intel 3 nm-57% |
| Architecture | Sapphire Rapids (2023−2024) | Granite Rapids (2024−2025) |
| PassMark | 65,077 | 64,761 |
| Geekbench 6 Single | 1,814 | — |
| Geekbench 6 Multi | 44,869 | — |
Memory & Platform
The Xeon w9-3475X uses the LGA4677 socket (PCIe 5.0), while the Xeon 6521P uses LGA4710 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800 on the Xeon w9-3475X versus 6400 on the Xeon 6521P — the Xeon 6521P supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4096 GB of RAM. Both feature 8-channel memory with ECC support. PCIe lanes: 112 (Xeon w9-3475X) vs 136 (Xeon 6521P) — the Xeon 6521P offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: W790 (Xeon w9-3475X) and C741 (Xeon 6521P).
| Feature | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| Socket | LGA4677 | LGA4710 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-4800 | 6400+127900% |
| Max RAM Capacity | 4096 GB+104857500% | 4096 |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 112 | 136+21% |
Advanced Features
Only the Xeon w9-3475X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: true (Xeon w9-3475X) vs VT-x, VT-d (Xeon 6521P). Direct competitor: Xeon w9-3475X rivals Threadripper PRO 7965WX; Xeon 6521P rivals EPYC 9354.
| Feature | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | Yes |
| Virtualization | true | VT-x, VT-d |
Value Analysis
The Xeon w9-3475X launched at $3739 MSRP, while the Xeon 6521P debuted at $1250. At current prices ($3930 vs $1250), the Xeon 6521P is $2680 cheaper. In terms of value (PassMark points per dollar), the Xeon w9-3475X delivers 16.6 pts/$ vs 51.8 pts/$ for the Xeon 6521P — making the Xeon 6521P the 103.1% better value option.
| Feature | Xeon w9-3475X | Xeon 6521P |
|---|---|---|
| MSRP | $3739 | $1250-67% |
| Avg Price (30d) | $3930 | $1250-68% |
| Performance per Dollar | 16.6 | 51.8+212% |
| Release Date | 2023 | 2025 |
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