EPYC 4584PX vs Ryzen 9 9955HX3D
EPYC 4584PX
Ryzen 9 9955HX3D
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 4584PX
Performance Per Dollar Ryzen 9 9955HX3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($1,517) | ✅ More affordable ($749) |
| Longevity | ✨ Modern (Raphael (2023−2025) / 5 nm) | ✨ Modern (Fire Range-HX (Zen 5) (2025) / 4 nm) |
💎 Value Proposition
| Insight | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+107%) |
| Upfront Cost | ⚠️ Higher cost ($1,517) | ✅ More affordable ($749) |
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 4584PX and Ryzen 9 9955HX3D
EPYC 4584PX
The EPYC 4584PX is manufactured by AMD. It was released in 21 May 2024 (1 year ago). It is based on the Raphael (2023−2025) architecture. It features 16 cores and 32 threads. Base frequency is 4.2 GHz, with boost up to 5.7 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5. Passmark benchmark score: 60,169 points. Launch price was $699.
Ryzen 9 9955HX3D
The Ryzen 9 9955HX3D is manufactured by AMD. It was released in 2025-01-01. It is based on the Fire Range-HX (Zen 5) (2025) architecture. It features 16 cores and 32 threads. Base frequency is 2.5 GHz, with boost up to 5.4 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: FL1. Thermal design power (TDP): 55 Watt. Memory support: DDR5. Passmark benchmark score: 61,578 points. Launch price was $700.
Processing Power
Both the EPYC 4584PX and Ryzen 9 9955HX3D share an identical 16-core/32-thread configuration. Boost clocks reach 5.7 GHz on the EPYC 4584PX versus 5.4 GHz on the Ryzen 9 9955HX3D — a 5.4% clock advantage for the EPYC 4584PX (base: 4.2 GHz vs 2.5 GHz). The EPYC 4584PX uses the Raphael (2023−2025) architecture (5 nm), while the Ryzen 9 9955HX3D uses Fire Range-HX (Zen 5) (2025) (4 nm). In PassMark, the EPYC 4584PX scores 60,169 against the Ryzen 9 9955HX3D's 61,578 — a 2.3% lead for the Ryzen 9 9955HX3D. Both processors carry 128 MB (total) of L3 cache.
| Feature | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| Cores / Threads | 16 / 32 | 16 / 32 |
| Boost Clock | 5.7 GHz+6% | 5.4 GHz |
| Base Clock | 4.2 GHz+68% | 2.5 GHz |
| L3 Cache | 128 MB (total) | 128 MB (total) |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 5 nm | 4 nm-20% |
| Architecture | Raphael (2023−2025) | Fire Range-HX (Zen 5) (2025) |
| PassMark | 60,169 | 61,578+2% |
Memory & Platform
The EPYC 4584PX uses the AM5 socket (PCIe 4.0), while the Ryzen 9 9955HX3D uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 5200 on the EPYC 4584PX versus 5600 on the Ryzen 9 9955HX3D — the Ryzen 9 9955HX3D supports 7.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 4584PX supports up to 256 of RAM compared to 96 — 90.9% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 28 PCIe lanes. Chipset compatibility: AM5 (EPYC 4584PX) and FL1 (Ryzen 9 9955HX3D).
| Feature | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| Socket | AM5 | FL1 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | 5200 | 5600+8% |
| Max RAM Capacity | 256+167% | 96 |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28 | 28 |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support VT-x, VT-d, AMD-V virtualization. Both include integrated graphics — AMD Radeon Graphics (EPYC 4584PX) and AMD Radeon 610M (Ryzen 9 9955HX3D) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Direct competitor: EPYC 4584PX rivals Ryzen 9 7950X; Ryzen 9 9955HX3D rivals Core Ultra 9 185H.
| Feature | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | AMD Radeon Graphics | AMD Radeon 610M |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d, AMD-V | VT-x, VT-d, AMD-V |
Value Analysis
The EPYC 4584PX launched at $1517 MSRP, while the Ryzen 9 9955HX3D debuted at $749.
| Feature | EPYC 4584PX | Ryzen 9 9955HX3D |
|---|---|---|
| MSRP | $1517 | $749-51% |
| Avg Price (30d) | $1517 | — |
| Release Date | 2024 | 2025 |
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