Ryzen Threadripper PRO 9955WX
Xeon 6521P
Ryzen Threadripper PRO 9955WX vs Xeon 6521P Performance Spectrum
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.
Ryzen Threadripper PRO 9955WX vs Xeon 6521P FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Among Us
Apex Legends
ARC Raiders
Baldur's Gate 3
Call of Duty: Black Ops 6
Ryzen Threadripper PRO 9955WX vs Xeon 6521P: Pros, Cons & Final Verdict
See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.
Ryzen Threadripper PRO 9955WX
2025Why buy it
- ✅Better for gaming: +23.7% higher average FPS across 50 shared CPU benchmark tests.
- ✅Costs $821 less on MSRP ($429 MSRP vs $1,250 MSRP).
- ✅Delivers 204.0% more PassMark for each dollar spent, at 157.5 vs 51.8 PassMark/$ ($429 MSRP vs $1,250 MSRP).
Trade-offs
- ❌Smaller total L3 cache (64 MB vs 144 MB).
- ❌55.6% higher power demand at 350W vs 225W.
Xeon 6521P
2025Why buy it
- ✅+125% larger total L3 cache (144 MB vs 64 MB).
- ✅Draws 225W instead of 350W, a 125W reduction.
- ✅6.3% more PCIe lanes (136 vs 128) for storage and expansion-heavy builds.
Trade-offs
- ❌Worse for gaming: lower average FPS than Ryzen Threadripper PRO 9955WX across 50 shared CPU benchmark tests.
- ❌Lower PassMark (64,761 vs 67,561).
- ❌Lower PassMark per dollar, at 51.8 vs 157.5 PassMark/$ ($1,250 MSRP vs $429 MSRP).
Quick Answers
So, is Ryzen Threadripper PRO 9955WX better than Xeon 6521P?
Which one is better for gaming?
Which one is better for streaming, content creation, and heavy multitasking?
Which one is the smarter buy today, not just the cheaper CPU?
Which one is more future-proof for 2026 and beyond?
Ryzen Threadripper PRO 9955WX vs Xeon 6521P Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
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.
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 Ryzen Threadripper PRO 9955WX packs 16 cores / 32 threads, while the Xeon 6521P offers 24 cores / 48 threads — the Xeon 6521P has 8 more cores. Boost clocks reach 5.4 GHz on the Ryzen Threadripper PRO 9955WX versus 4.1 GHz on the Xeon 6521P — a 27.4% clock advantage for the Ryzen Threadripper PRO 9955WX (base: 4.5 GHz vs 2.6 GHz). The Ryzen Threadripper PRO 9955WX uses the Shimada Peak (2025) architecture (4 nm), while the Xeon 6521P uses Granite Rapids (2024−2025) (Intel 3 nm). In PassMark, the Ryzen Threadripper PRO 9955WX scores 67,561 against the Xeon 6521P's 64,761 — a 4.2% lead for the Ryzen Threadripper PRO 9955WX. L3 cache: 64 MB (total) on the Ryzen Threadripper PRO 9955WX vs 144 MB (total) on the Xeon 6521P.
| Feature | Ryzen Threadripper PRO 9955WX | Xeon 6521P |
|---|---|---|
| Cores / Threads | 16 / 32 | 24 / 48+50% |
| Boost Clock | 5.4 GHz+32% | 4.1 GHz |
| Base Clock | 4.5 GHz+73% | 2.6 GHz |
| L3 Cache | 64 MB (total) | 144 MB (total)+125% |
| L2 Cache | 1 MB (per core) | 2 MB (per core)+100% |
| Process | 4 nm | Intel 3 nm-25% |
| Architecture | Shimada Peak (2025) | Granite Rapids (2024−2025) |
| PassMark | 67,561+4% | 64,761 |
| Cinebench R23 Multi | 40,000 | — |
| Geekbench 6 Single | 3,016 | — |
| Geekbench 6 Multi | 23,596 | — |
Memory & Platform
The Ryzen Threadripper PRO 9955WX uses the sTR5 socket (PCIe 4.0), while the Xeon 6521P uses LGA4710 (PCIe 5.0) — making them incompatible on the same motherboard. Both support up to DDR5-6400 memory speed. The Xeon 6521P supports up to 4096 GB of RAM compared to 2048 GB — 100% more capacity for professional workloads. Both feature 8-channel memory with ECC support. PCIe lanes: 128 (Ryzen Threadripper PRO 9955WX) vs 136 (Xeon 6521P) — the Xeon 6521P offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: WRX90 (Ryzen Threadripper PRO 9955WX) and C741 (Xeon 6521P).
| Feature | Ryzen Threadripper PRO 9955WX | Xeon 6521P |
|---|---|---|
| Socket | sTR5 | LGA4710 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | DDR5-6400 | 6400 |
| Max RAM Capacity | 2048 GB | 4096 GB+100% |
| RAM Channels | 8 | 8 |
| ECC Support | Yes | Yes |
| PCIe Lanes | 128 | 136+6% |
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: true (Ryzen Threadripper PRO 9955WX) vs VT-x, VT-d (Xeon 6521P). Direct competitor: Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555; Xeon 6521P rivals EPYC 9354.
| Feature | Ryzen Threadripper PRO 9955WX | 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
At launch, the Ryzen Threadripper PRO 9955WX was priced at $429, while the Xeon 6521P came in at $1250. On launch pricing ($429 vs $1250), Ryzen Threadripper PRO 9955WX was $821 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen Threadripper PRO 9955WX delivers 157.5 pts/$ vs 51.8 pts/$ for the Xeon 6521P — making the Ryzen Threadripper PRO 9955WX the 101% better value option.
| Feature | Ryzen Threadripper PRO 9955WX | Xeon 6521P |
|---|---|---|
| MSRP | $429-66% | $1250 |
| Performance per Dollar | 157.5+204% | 51.8 |
| Release Date | 2025 | 2025 |
Affiliate Disclosure
ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.
Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Ryzen Threadripper PRO 9955WX and Xeon 6521P
