EPYC 8434P vs Ryzen Threadripper PRO 9955WX
EPYC 8434P
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 EPYC 8434P
Performance Per Dollar Ryzen Threadripper PRO 9955WX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 8434P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($3,137) | ✅ More affordable ($450) |
| Longevity | ✨ Modern (Siena (2023−2024) / 5 nm) | ✨ Modern (Shimada Peak (2025) / 4 nm) |
💎 Value Proposition
| Insight | EPYC 8434P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+608%) |
| Upfront Cost | ⚠️ Higher cost ($3,137) | ✅ 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 EPYC 8434P and Ryzen Threadripper PRO 9955WX
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.
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 EPYC 8434P packs 48 cores / 96 threads, while the Ryzen Threadripper PRO 9955WX offers 16 cores / 32 threads — the EPYC 8434P has 32 more cores. Boost clocks reach 3.1 GHz on the EPYC 8434P versus 5.4 GHz on the Ryzen Threadripper PRO 9955WX — a 54.1% clock advantage for the Ryzen Threadripper PRO 9955WX (base: 2.5 GHz vs 4.5 GHz). The EPYC 8434P uses the Siena (2023−2024) architecture (5 nm), while the Ryzen Threadripper PRO 9955WX uses Shimada Peak (2025) (4 nm). In PassMark, the EPYC 8434P scores 66,490 against the Ryzen Threadripper PRO 9955WX's 67,561 — a 1.6% lead for the Ryzen Threadripper PRO 9955WX. L3 cache: 128 MB (total) on the EPYC 8434P vs 64 MB (total) on the Ryzen Threadripper PRO 9955WX.
| Feature | EPYC 8434P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Cores / Threads | 48 / 96+200% | 16 / 32 |
| Boost Clock | 3.1 GHz | 5.4 GHz+74% |
| Base Clock | 2.5 GHz | 4.5 GHz+80% |
| L3 Cache | 128 MB (total)+100% | 64 MB (total) |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 5 nm | 4 nm-20% |
| Architecture | Siena (2023−2024) | Shimada Peak (2025) |
| PassMark | 66,490 | 67,561+2% |
| Cinebench R23 Multi | — | 40,000 |
| Geekbench 6 Single | — | 3,016 |
| Geekbench 6 Multi | — | 23,596 |
Memory & Platform
The EPYC 8434P uses the SP6 socket (PCIe 4.0), while the Ryzen Threadripper PRO 9955WX uses sTR5 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 4800 on the EPYC 8434P versus DDR5-6400 on the Ryzen Threadripper PRO 9955WX — 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: 6 (EPYC 8434P) vs 8 (Ryzen Threadripper PRO 9955WX). PCIe lanes: 96 (EPYC 8434P) vs 128 (Ryzen Threadripper PRO 9955WX) — the Ryzen Threadripper PRO 9955WX offers 32 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP6 (EPYC 8434P) and WRX90 (Ryzen Threadripper PRO 9955WX).
| Feature | EPYC 8434P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| Socket | SP6 | sTR5 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | 4800+95900% | DDR5-6400 |
| Max RAM Capacity | 1152 | 2048 GB+186413411% |
| RAM Channels | 6 | 8+33% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 96 | 128+33% |
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 (EPYC 8434P) vs true (Ryzen Threadripper PRO 9955WX). Direct competitor: EPYC 8434P rivals Xeon Platinum 8452Y; Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555.
| Feature | EPYC 8434P | 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 EPYC 8434P launched at $1517 MSRP, while the Ryzen Threadripper PRO 9955WX debuted at $429. At current prices ($3137 vs $450), the Ryzen Threadripper PRO 9955WX is $2687 cheaper. In terms of value (PassMark points per dollar), the EPYC 8434P delivers 21.2 pts/$ vs 150.1 pts/$ for the Ryzen Threadripper PRO 9955WX — making the Ryzen Threadripper PRO 9955WX the 150.5% better value option.
| Feature | EPYC 8434P | Ryzen Threadripper PRO 9955WX |
|---|---|---|
| MSRP | $1517 | $429-72% |
| Avg Price (30d) | $3137 | $450-86% |
| Performance per Dollar | 21.2 | 150.1+608% |
| Release Date | 2023 | 2025 |
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