Ryzen Threadripper PRO 9955WX vs EPYC 8434P
Ryzen Threadripper PRO 9955WX
EPYC 8434P
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 Ryzen Threadripper PRO 9955WX
Performance Per Dollar EPYC 8434P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($450) | ⚠️ Higher cost ($3,137) |
| Longevity | ✨ Modern (Shimada Peak (2025) / 4 nm) | ✨ Modern (Siena (2023−2024) / 5 nm) |
💎 Value Proposition
| Insight | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+608%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($450) | ⚠️ Higher cost ($3,137) |
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 Ryzen Threadripper PRO 9955WX and EPYC 8434P
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.
EPYC 8434P
The EPYC 8434P is manufactured by AMD. It was released in 18 September 2023 (2 years ago). It is based on the Siena (2023−2024) architecture. It features 48 cores and 96 threads. Base frequency is 2.5 GHz, with boost up to 3.1 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: SP6. Thermal design power (TDP): 200 Watt. Memory support: DDR5. Passmark benchmark score: 66,490 points. Launch price was $2,700.
Processing Power
The Ryzen Threadripper PRO 9955WX packs 16 cores / 32 threads, while the EPYC 8434P offers 48 cores / 96 threads — the EPYC 8434P has 32 more cores. Boost clocks reach 5.4 GHz on the Ryzen Threadripper PRO 9955WX versus 3.1 GHz on the EPYC 8434P — a 54.1% clock advantage for the Ryzen Threadripper PRO 9955WX (base: 4.5 GHz vs 2.5 GHz). The Ryzen Threadripper PRO 9955WX uses the Shimada Peak (2025) architecture (4 nm), while the EPYC 8434P uses Siena (2023−2024) (5 nm). In PassMark, the Ryzen Threadripper PRO 9955WX scores 67,561 against the EPYC 8434P's 66,490 — a 1.6% lead for the Ryzen Threadripper PRO 9955WX. L3 cache: 64 MB (total) on the Ryzen Threadripper PRO 9955WX vs 128 MB (total) on the EPYC 8434P.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| Cores / Threads | 16 / 32 | 48 / 96+200% |
| Boost Clock | 5.4 GHz+74% | 3.1 GHz |
| Base Clock | 4.5 GHz+80% | 2.5 GHz |
| L3 Cache | 64 MB (total) | 128 MB (total)+100% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm-20% | 5 nm |
| Architecture | Shimada Peak (2025) | Siena (2023−2024) |
| PassMark | 67,561+2% | 66,490 |
| 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 EPYC 8434P uses SP6 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Ryzen Threadripper PRO 9955WX versus 4800 on the EPYC 8434P — the EPYC 8434P supports 199.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen Threadripper PRO 9955WX supports up to 2048 GB of RAM compared to 1152 — 56% more capacity for professional workloads. Memory channels: 8 (Ryzen Threadripper PRO 9955WX) vs 6 (EPYC 8434P). PCIe lanes: 128 (Ryzen Threadripper PRO 9955WX) vs 96 (EPYC 8434P) — the Ryzen Threadripper PRO 9955WX offers 32 more lanes for additional GPUs or NVMe drives. Chipset compatibility: WRX90 (Ryzen Threadripper PRO 9955WX) and SP6 (EPYC 8434P).
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| Socket | sTR5 | SP6 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR5-6400 | 4800+95900% |
| Max RAM Capacity | 2048 GB+186413411% | 1152 |
| RAM Channels | 8+33% | 6 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+33% | 96 |
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 (EPYC 8434P). Direct competitor: Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555; EPYC 8434P rivals Xeon Platinum 8452Y.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | Yes |
| Virtualization | true | VT-x, VT-d |
Value Analysis
The Ryzen Threadripper PRO 9955WX launched at $429 MSRP, while the EPYC 8434P debuted at $1517. At current prices ($450 vs $3137), the Ryzen Threadripper PRO 9955WX is $2687 cheaper. In terms of value (PassMark points per dollar), the Ryzen Threadripper PRO 9955WX delivers 150.1 pts/$ vs 21.2 pts/$ for the EPYC 8434P — making the Ryzen Threadripper PRO 9955WX the 150.5% better value option.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 8434P |
|---|---|---|
| MSRP | $429-72% | $1517 |
| Avg Price (30d) | $450-86% | $3137 |
| Performance per Dollar | 150.1+608% | 21.2 |
| Release Date | 2025 | 2023 |
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