Ryzen Threadripper PRO 9955WX vs EPYC 4585PX
Ryzen Threadripper PRO 9955WX
EPYC 4585PX
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 4585PX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($450) | ⚠️ Higher cost ($826) |
| Longevity | ✨ Modern (Shimada Peak (2025) / 4 nm) | ✨ Modern (Grado (2025) / 4 nm) |
💎 Value Proposition
| Insight | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+76%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($450) | ⚠️ Higher cost ($826) |
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 4585PX
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 4585PX
The EPYC 4585PX is manufactured by AMD. It was released in 13 May 2025 (less than a year ago). It is based on the Grado (2025) architecture. It features 16 cores and 32 threads. Base frequency is 4.3 GHz, with boost up to 5.7 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 170 Watt. Memory support: DDR5. Passmark benchmark score: 70,563 points. Launch price was $699.
Processing Power
Both the Ryzen Threadripper PRO 9955WX and EPYC 4585PX share an identical 16-core/32-thread configuration. Boost clocks reach 5.4 GHz on the Ryzen Threadripper PRO 9955WX versus 5.7 GHz on the EPYC 4585PX — a 5.4% clock advantage for the EPYC 4585PX (base: 4.5 GHz vs 4.3 GHz). The Ryzen Threadripper PRO 9955WX uses the Shimada Peak (2025) architecture (4 nm), while the EPYC 4585PX uses Grado (2025) (4 nm). In PassMark, the Ryzen Threadripper PRO 9955WX scores 67,561 against the EPYC 4585PX's 70,563 — a 4.3% lead for the EPYC 4585PX. L3 cache: 64 MB (total) on the Ryzen Threadripper PRO 9955WX vs 128 MB (total) on the EPYC 4585PX.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| Cores / Threads | 16 / 32 | 16 / 32 |
| Boost Clock | 5.4 GHz | 5.7 GHz+6% |
| Base Clock | 4.5 GHz+5% | 4.3 GHz |
| L3 Cache | 64 MB (total) | 128 MB (total)+100% |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm | 4 nm |
| Architecture | Shimada Peak (2025) | Grado (2025) |
| PassMark | 67,561 | 70,563+4% |
| 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 4585PX uses AM5 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Ryzen Threadripper PRO 9955WX versus 5600 on the EPYC 4585PX — the EPYC 4585PX 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 256 — 155.6% more capacity for professional workloads. Memory channels: 8 (Ryzen Threadripper PRO 9955WX) vs 2 (EPYC 4585PX). PCIe lanes: 128 (Ryzen Threadripper PRO 9955WX) vs 28 (EPYC 4585PX) — the Ryzen Threadripper PRO 9955WX offers 100 more lanes for additional GPUs or NVMe drives. Chipset compatibility: WRX90 (Ryzen Threadripper PRO 9955WX) and AM5 (EPYC 4585PX).
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| Socket | sTR5 | AM5 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR5-6400 | 5600+111900% |
| Max RAM Capacity | 2048 GB+838860700% | 256 |
| RAM Channels | 8+300% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+357% | 28 |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. 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, AMD-V (EPYC 4585PX). The EPYC 4585PX includes integrated graphics (AMD Radeon Graphics), while the Ryzen Threadripper PRO 9955WX requires a dedicated GPU. Direct competitor: Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555; EPYC 4585PX rivals Core Ultra 9 285K.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | AMD Radeon Graphics |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | true | VT-x, VT-d, AMD-V |
Value Analysis
The Ryzen Threadripper PRO 9955WX launched at $429 MSRP, while the EPYC 4585PX debuted at $699. At current prices ($450 vs $826), the Ryzen Threadripper PRO 9955WX is $376 cheaper. In terms of value (PassMark points per dollar), the Ryzen Threadripper PRO 9955WX delivers 150.1 pts/$ vs 85.4 pts/$ for the EPYC 4585PX — making the Ryzen Threadripper PRO 9955WX the 54.9% better value option.
| Feature | Ryzen Threadripper PRO 9955WX | EPYC 4585PX |
|---|---|---|
| MSRP | $429-39% | $699 |
| Avg Price (30d) | $450-46% | $826 |
| Performance per Dollar | 150.1+76% | 85.4 |
| Release Date | 2025 | 2025 |
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