Ryzen 9 9955HX3D vs EPYC 4584PX
Ryzen 9 9955HX3D
EPYC 4584PX
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 9 9955HX3D
Performance Per Dollar EPYC 4584PX
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($749) | ⚠️ Higher cost ($1,517) |
| Longevity | ✨ Modern (Fire Range-HX (Zen 5) (2025) / 4 nm) | ✨ Modern (Raphael (2023−2025) / 5 nm) |
💎 Value Proposition
| Insight | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+107%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($749) | ⚠️ Higher cost ($1,517) |
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 9 9955HX3D and EPYC 4584PX
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.
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.
Processing Power
Both the Ryzen 9 9955HX3D and EPYC 4584PX share an identical 16-core/32-thread configuration. Boost clocks reach 5.4 GHz on the Ryzen 9 9955HX3D versus 5.7 GHz on the EPYC 4584PX — a 5.4% clock advantage for the EPYC 4584PX (base: 2.5 GHz vs 4.2 GHz). The Ryzen 9 9955HX3D uses the Fire Range-HX (Zen 5) (2025) architecture (4 nm), while the EPYC 4584PX uses Raphael (2023−2025) (5 nm). In PassMark, the Ryzen 9 9955HX3D scores 61,578 against the EPYC 4584PX's 60,169 — a 2.3% lead for the Ryzen 9 9955HX3D. Both processors carry 128 MB (total) of L3 cache.
| Feature | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| Cores / Threads | 16 / 32 | 16 / 32 |
| Boost Clock | 5.4 GHz | 5.7 GHz+6% |
| Base Clock | 2.5 GHz | 4.2 GHz+68% |
| L3 Cache | 128 MB (total) | 128 MB (total) |
| L2 Cache | 1 MB (per core) | 1 MB (per core) |
| Process | 4 nm-20% | 5 nm |
| Architecture | Fire Range-HX (Zen 5) (2025) | Raphael (2023−2025) |
| PassMark | 61,578+2% | 60,169 |
Memory & Platform
The Ryzen 9 9955HX3D uses the FL1 socket (PCIe 5.0), while the EPYC 4584PX uses AM5 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 5600 on the Ryzen 9 9955HX3D versus 5200 on the EPYC 4584PX — 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: FL1 (Ryzen 9 9955HX3D) and AM5 (EPYC 4584PX).
| Feature | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| Socket | FL1 | AM5 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | 5600+8% | 5200 |
| Max RAM Capacity | 96 | 256+167% |
| 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 610M (Ryzen 9 9955HX3D) and AMD Radeon Graphics (EPYC 4584PX) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Direct competitor: Ryzen 9 9955HX3D rivals Core Ultra 9 185H; EPYC 4584PX rivals Ryzen 9 7950X.
| Feature | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | AMD Radeon 610M | AMD Radeon Graphics |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | Yes |
| Virtualization | VT-x, VT-d, AMD-V | VT-x, VT-d, AMD-V |
Value Analysis
The Ryzen 9 9955HX3D launched at $749 MSRP, while the EPYC 4584PX debuted at $1517.
| Feature | Ryzen 9 9955HX3D | EPYC 4584PX |
|---|---|---|
| MSRP | $749-51% | $1517 |
| Avg Price (30d) | — | $1517 |
| Release Date | 2025 | 2024 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Ryzen 9 9955HX3D and EPYC 4584PX
