EPYC 7443 vs Ryzen 9 9955HX
EPYC 7443
Ryzen 9 9955HX
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 7443
Performance Per Dollar
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7443 | Ryzen 9 9955HX |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($1,800) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Milan (2021−2023) / 7 nm+) | ✨ Modern (Fire Range-HX (Zen 5) (2025) / 4 nm) |
💎 Value Proposition
| Insight | EPYC 7443 | Ryzen 9 9955HX |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($1,800) | ✅ More affordable ($0) |
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.
League of Legends
Valorant
Technical Specifications
Side-by-side comparison of EPYC 7443 and Ryzen 9 9955HX
EPYC 7443
The EPYC 7443 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: 56,743 points. Launch price was $2,010.
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.
Processing Power
The EPYC 7443 packs 24 cores / 48 threads, while the Ryzen 9 9955HX offers 16 cores / 32 threads — the EPYC 7443 has 8 more cores. Boost clocks reach 4 GHz on the EPYC 7443 versus 5.4 GHz on the Ryzen 9 9955HX — a 29.8% clock advantage for the Ryzen 9 9955HX (base: 2.85 GHz vs 2.5 GHz). The EPYC 7443 uses the Milan (2021−2023) architecture (7 nm+), while the Ryzen 9 9955HX uses Fire Range-HX (Zen 5) (2025) (4 nm). In PassMark, the EPYC 7443 scores 56,743 against the Ryzen 9 9955HX's 55,711 — a 1.8% lead for the EPYC 7443. L3 cache: 128 MB (total) on the EPYC 7443 vs 64 MB (total) on the Ryzen 9 9955HX.
| Feature | EPYC 7443 | Ryzen 9 9955HX |
|---|---|---|
| Cores / Threads | 24 / 48+50% | 16 / 32 |
| Boost Clock | 4 GHz | 5.4 GHz+35% |
| Base Clock | 2.85 GHz+14% | 2.5 GHz |
| L3 Cache | 128 MB (total)+100% | 64 MB (total) |
| L2 Cache | 512 kB (per core) | 1 MB (per core)+100% |
| Process | 7 nm+ | 4 nm-43% |
| Architecture | Milan (2021−2023) | Fire Range-HX (Zen 5) (2025) |
| PassMark | 56,743+2% | 55,711 |
| Cinebench R23 Multi | — | 38,010 |
| Geekbench 6 Single | — | 3,219 |
| Geekbench 6 Multi | — | 19,563 |
Memory & Platform
The EPYC 7443 uses the SP3 socket (PCIe 4.0), while the Ryzen 9 9955HX uses FL1 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 3200 on the EPYC 7443 versus DDR5-5600 on the Ryzen 9 9955HX — the EPYC 7443 supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7443 supports up to 4096 of RAM compared to 96 GB — 190.8% more capacity for professional workloads. Memory channels: 8 (EPYC 7443) vs 2 (Ryzen 9 9955HX). PCIe lanes: 128 (EPYC 7443) vs 28 (Ryzen 9 9955HX) — the EPYC 7443 offers 100 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7443) and AMD FL1 (Ryzen 9 9955HX).
| Feature | EPYC 7443 | Ryzen 9 9955HX |
|---|---|---|
| Socket | SP3 | FL1 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | 3200+63900% | DDR5-5600 |
| Max RAM Capacity | 4096 | 96 GB+2457500% |
| RAM Channels | 8+300% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+357% | 28 |
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: VT-x, VT-d (EPYC 7443) vs true (Ryzen 9 9955HX). The Ryzen 9 9955HX includes integrated graphics (Radeon 610M), while the EPYC 7443 requires a dedicated GPU. Direct competitor: EPYC 7443 rivals Xeon Platinum 8362; Ryzen 9 9955HX rivals Core Ultra 9 275HX.
| Feature | EPYC 7443 | Ryzen 9 9955HX |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | Radeon 610M |
| Unlocked | No | Yes |
| AVX-512 | No | Yes |
| Virtualization | VT-x, VT-d | true |
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