Ryzen 9 9955HX vs EPYC 7443P
Ryzen 9 9955HX
EPYC 7443P
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
Performance Per Dollar EPYC 7443P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 9955HX | EPYC 7443P |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($1,045) |
| Longevity | ✨ Modern (Fire Range-HX (Zen 5) (2025) / 4 nm) | ✨ Modern (Milan (2021−2023) / 7 nm+) |
💎 Value Proposition
| Insight | Ryzen 9 9955HX | EPYC 7443P |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($1,045) |
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 9955HX and EPYC 7443P
Ryzen 9 9955HX
The Ryzen 9 9955HX 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: 64 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: 55,711 points. Launch price was $650.
EPYC 7443P
The EPYC 7443P is manufactured by AMD. It was released in 15 March 2021 (4 years ago). It is based on the Milan (2021−2023) architecture. It features 24 cores and 48 threads. Base frequency is 2.85 GHz, with boost up to 4 GHz. L3 cache: 128 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 200 Watt. Memory support: DDR4-3200. Passmark benchmark score: 56,808 points. Launch price was $1,337.
Processing Power
The Ryzen 9 9955HX packs 16 cores / 32 threads, while the EPYC 7443P offers 24 cores / 48 threads — the EPYC 7443P has 8 more cores. Boost clocks reach 5.4 GHz on the Ryzen 9 9955HX versus 4 GHz on the EPYC 7443P — a 29.8% clock advantage for the Ryzen 9 9955HX (base: 2.5 GHz vs 2.85 GHz). The Ryzen 9 9955HX uses the Fire Range-HX (Zen 5) (2025) architecture (4 nm), while the EPYC 7443P uses Milan (2021−2023) (7 nm+). In PassMark, the Ryzen 9 9955HX scores 55,711 against the EPYC 7443P's 56,808 — a 1.9% lead for the EPYC 7443P. L3 cache: 64 MB (total) on the Ryzen 9 9955HX vs 128 MB (total) on the EPYC 7443P.
| Feature | Ryzen 9 9955HX | EPYC 7443P |
|---|---|---|
| Cores / Threads | 16 / 32 | 24 / 48+50% |
| Boost Clock | 5.4 GHz+35% | 4 GHz |
| Base Clock | 2.5 GHz | 2.85 GHz+14% |
| L3 Cache | 64 MB (total) | 128 MB (total)+100% |
| L2 Cache | 1 MB (per core)+100% | 512 kB (per core) |
| Process | 4 nm-43% | 7 nm+ |
| Architecture | Fire Range-HX (Zen 5) (2025) | Milan (2021−2023) |
| PassMark | 55,711 | 56,808+2% |
| Cinebench R23 Multi | 38,010 | — |
| Geekbench 6 Single | 3,219 | — |
| Geekbench 6 Multi | 19,563 | — |
Memory & Platform
The Ryzen 9 9955HX uses the FL1 socket (PCIe 5.0), while the EPYC 7443P uses SP3 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5600 on the Ryzen 9 9955HX versus 3200 on the EPYC 7443P — the EPYC 7443P supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7443P supports up to 4096 of RAM compared to 96 GB — 190.8% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 9955HX) vs 8 (EPYC 7443P). PCIe lanes: 28 (Ryzen 9 9955HX) vs 128 (EPYC 7443P) — the EPYC 7443P offers 100 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD FL1 (Ryzen 9 9955HX) and SP3 (EPYC 7443P).
| Feature | Ryzen 9 9955HX | EPYC 7443P |
|---|---|---|
| Socket | FL1 | SP3 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | DDR5-5600 | 3200+63900% |
| Max RAM Capacity | 96 GB+2457500% | 4096 |
| RAM Channels | 2 | 8+300% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28 | 128+357% |
Advanced Features
Only the Ryzen 9 9955HX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 9955HX supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: true (Ryzen 9 9955HX) vs VT-x, VT-d (EPYC 7443P). The Ryzen 9 9955HX includes integrated graphics (Radeon 610M), while the EPYC 7443P requires a dedicated GPU. Direct competitor: Ryzen 9 9955HX rivals Core Ultra 9 275HX; EPYC 7443P rivals Xeon Platinum 8362.
| Feature | Ryzen 9 9955HX | EPYC 7443P |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | Radeon 610M | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | true | VT-x, VT-d |
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