Xeon 6521P vs Ryzen Threadripper PRO 9955WX
Xeon 6521P
Ryzen Threadripper PRO 9955WX
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 6521P
Performance Per Dollar Ryzen Threadripper PRO 9955WX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($1,250) | ✅ More affordable ($450) |
| Longevity | ✨ Modern (Granite Rapids (2024−2025) / Intel 3 nm) | ✨ Modern (Shimada Peak (2025) / 4 nm) |
💎 Value Proposition
| Insight | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+190%) |
| Upfront Cost | ⚠️ Higher cost ($1,250) | ✅ More affordable ($450) |
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 6521P and Ryzen Threadripper PRO 9955WX
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.
Ryzen Threadripper PRO 9955WX
The Ryzen Threadripper PRO 9955WX is manufactured by AMD. It was released in 23 July 2025 (less than a year ago). It is based on the Shimada Peak (2025) architecture. It features 16 cores and 32 threads. Base frequency is 4.5 GHz, with boost up to 5.4 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: sTR5. Thermal design power (TDP): 350 Watt. Memory support: DDR5. Passmark benchmark score: 67,561 points. Launch price was $1,649.
Processing Power
The Xeon 6521P packs 24 cores / 48 threads, while the Ryzen Threadripper PRO 9955WX offers 16 cores / 32 threads — the Xeon 6521P has 8 more cores. Boost clocks reach 4.1 GHz on the Xeon 6521P versus 5.4 GHz on the Ryzen Threadripper PRO 9955WX — a 27.4% clock advantage for the Ryzen Threadripper PRO 9955WX (base: 2.6 GHz vs 4.5 GHz). The Xeon 6521P uses the Granite Rapids (2024−2025) architecture (Intel 3 nm), while the Ryzen Threadripper PRO 9955WX uses Shimada Peak (2025) (4 nm). In PassMark, the Xeon 6521P scores 64,761 against the Ryzen Threadripper PRO 9955WX's 67,561 — a 4.2% lead for the Ryzen Threadripper PRO 9955WX. L3 cache: 144 MB (total) on the Xeon 6521P vs 64 MB (total) on the Ryzen Threadripper PRO 9955WX.
| Feature | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Cores / Threads | 24 / 48+50% | 16 / 32 |
| Boost Clock | 4.1 GHz | 5.4 GHz+32% |
| Base Clock | 2.6 GHz | 4.5 GHz+73% |
| L3 Cache | 144 MB (total)+125% | 64 MB (total) |
| L2 Cache | 2 MB (per core)+100% | 1 MB (per core) |
| Process | Intel 3 nm-25% | 4 nm |
| Architecture | Granite Rapids (2024−2025) | Shimada Peak (2025) |
| PassMark | 64,761 | 67,561+4% |
| Cinebench R23 Multi | — | 40,000 |
| Geekbench 6 Single | — | 3,016 |
| Geekbench 6 Multi | — | 23,596 |
Memory & Platform
The Xeon 6521P uses the LGA4710 socket (PCIe 5.0), while the Ryzen Threadripper PRO 9955WX uses sTR5 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 6400 on the Xeon 6521P versus DDR5-6400 on the Ryzen Threadripper PRO 9955WX — 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 2048 GB — 66.7% more capacity for professional workloads. Both feature 8-channel memory with ECC support. PCIe lanes: 136 (Xeon 6521P) vs 128 (Ryzen Threadripper PRO 9955WX) — the Xeon 6521P offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: C741 (Xeon 6521P) and WRX90 (Ryzen Threadripper PRO 9955WX).
| Feature | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Socket | LGA4710 | sTR5 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | 6400+127900% | DDR5-6400 |
| Max RAM Capacity | 4096 | 2048 GB+52428700% |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 136+6% | 128 |
Advanced Features
Only the Ryzen Threadripper PRO 9955WX 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: VT-x, VT-d (Xeon 6521P) vs true (Ryzen Threadripper PRO 9955WX). Direct competitor: Xeon 6521P rivals EPYC 9354; Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555.
| Feature | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d | true |
Value Analysis
The Xeon 6521P launched at $1250 MSRP, while the Ryzen Threadripper PRO 9955WX debuted at $429. At current prices ($1250 vs $450), the Ryzen Threadripper PRO 9955WX is $800 cheaper. In terms of value (PassMark points per dollar), the Xeon 6521P delivers 51.8 pts/$ vs 150.1 pts/$ for the Ryzen Threadripper PRO 9955WX — making the Ryzen Threadripper PRO 9955WX the 97.4% better value option.
| Feature | Xeon 6521P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| MSRP | $1250 | $429-66% |
| Avg Price (30d) | $1250 | $450-64% |
| Performance per Dollar | 51.8 | 150.1+190% |
| Release Date | 2025 | 2025 |
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