Ryzen 9 9955HX3D vs EPYC 7543
Ryzen 9 9955HX3D
EPYC 7543
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 7543
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($749) | ✅ More affordable ($468) |
| Longevity | ✨ Modern (Fire Range-HX (Zen 5) (2025) / 4 nm) | ✨ Modern (Milan (2021−2023) / 7 nm+) |
💎 Value Proposition
| Insight | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+64%) |
| Upfront Cost | ⚠️ Higher cost ($749) | ✅ More affordable ($468) |
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 7543
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 7543
The EPYC 7543 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 32 cores and 64 threads. Base frequency is 2.8 GHz, with boost up to 3.7 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4-3200. Passmark benchmark score: 62,952 points. Launch price was $3,761.
Processing Power
The Ryzen 9 9955HX3D packs 16 cores / 32 threads, while the EPYC 7543 offers 32 cores / 64 threads — the EPYC 7543 has 16 more cores. Boost clocks reach 5.4 GHz on the Ryzen 9 9955HX3D versus 3.7 GHz on the EPYC 7543 — a 37.4% clock advantage for the Ryzen 9 9955HX3D (base: 2.5 GHz vs 2.8 GHz). The Ryzen 9 9955HX3D uses the Fire Range-HX (Zen 5) (2025) architecture (4 nm), while the EPYC 7543 uses Milan (2021−2023) (7 nm+). In PassMark, the Ryzen 9 9955HX3D scores 61,578 against the EPYC 7543's 62,952 — a 2.2% lead for the EPYC 7543. L3 cache: 128 MB (total) on the Ryzen 9 9955HX3D vs 256 MB (total) on the EPYC 7543.
| Feature | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| Cores / Threads | 16 / 32 | 32 / 64+100% |
| Boost Clock | 5.4 GHz+46% | 3.7 GHz |
| Base Clock | 2.5 GHz | 2.8 GHz+12% |
| L3 Cache | 128 MB (total) | 256 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 | 61,578 | 62,952+2% |
Memory & Platform
The Ryzen 9 9955HX3D uses the FL1 socket (PCIe 5.0), while the EPYC 7543 uses SP3 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 5600 on the Ryzen 9 9955HX3D versus 3200 on the EPYC 7543 — the Ryzen 9 9955HX3D supports 54.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7543 supports up to 4096 of RAM compared to 96 — 190.8% more capacity for professional workloads. Memory channels: 2 (Ryzen 9 9955HX3D) vs 8 (EPYC 7543). PCIe lanes: 28 (Ryzen 9 9955HX3D) vs 128 (EPYC 7543) — the EPYC 7543 offers 100 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FL1 (Ryzen 9 9955HX3D) and SP3 (EPYC 7543).
| Feature | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| Socket | FL1 | SP3 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | 5600+75% | 3200 |
| Max RAM Capacity | 96 | 4096+4167% |
| RAM Channels | 2 | 8+300% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28 | 128+357% |
Advanced Features
Only the Ryzen 9 9955HX3D has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 9955HX3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d, AMD-V (Ryzen 9 9955HX3D) vs VT-x, VT-d (EPYC 7543). The Ryzen 9 9955HX3D includes integrated graphics (AMD Radeon 610M), while the EPYC 7543 requires a dedicated GPU. Direct competitor: Ryzen 9 9955HX3D rivals Core Ultra 9 185H; EPYC 7543 rivals Xeon Platinum 8380.
| Feature | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | AMD Radeon 610M | None |
| Unlocked | Yes | No |
| AVX-512 | Yes | No |
| Virtualization | VT-x, VT-d, AMD-V | VT-x, VT-d |
Value Analysis
The Ryzen 9 9955HX3D launched at $749 MSRP, while the EPYC 7543 debuted at $10257.
| Feature | Ryzen 9 9955HX3D | EPYC 7543 |
|---|---|---|
| MSRP | $749-93% | $10257 |
| Avg Price (30d) | — | $468 |
| Release Date | 2025 | 2021 |
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