EPYC 4345P vs Ryzen 9 5900X
EPYC 4345P
Ryzen 9 5900X
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 4345P
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($329) | ⚠️ Higher cost ($350) |
| Longevity | ✨ Modern (Grado (2025) / 4 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+2%) |
| Upfront Cost | ✅ More affordable ($329) | ⚠️ Higher cost ($350) |
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 4345P and Ryzen 9 5900X
EPYC 4345P
The EPYC 4345P is manufactured by AMD. It was released in 13 May 2025 (less than a year ago). It is based on the Grado (2025) architecture. It features 8 cores and 16 threads. Base frequency is 3.8 GHz, with boost up to 5.5 GHz. L3 cache: 32 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: AM5. Thermal design power (TDP): 65 Watt. Memory support: DDR5. Passmark benchmark score: 36,006 points. Launch price was $329.
Ryzen 9 5900X
The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.
Processing Power
The EPYC 4345P packs 8 cores / 16 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 4 more cores. Boost clocks reach 5.5 GHz on the EPYC 4345P versus 4.8 GHz on the Ryzen 9 5900X — a 13.6% clock advantage for the EPYC 4345P (base: 3.8 GHz vs 3.7 GHz). The EPYC 4345P uses the Grado (2025) architecture (4 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the EPYC 4345P scores 36,006 against the Ryzen 9 5900X's 38,955 — a 7.9% lead for the Ryzen 9 5900X. L3 cache: 32 MB (total) on the EPYC 4345P vs 64 MB on the Ryzen 9 5900X.
| Feature | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 8 / 16 | 12 / 24+50% |
| Boost Clock | 5.5 GHz+15% | 4.8 GHz |
| Base Clock | 3.8 GHz+3% | 3.7 GHz |
| L3 Cache | 32 MB (total) | 64 MB+100% |
| L2 Cache | 1 MB (per core)+100% | 512K (per core) |
| Process | 4 nm-43% | 7 nm, 12 nm |
| Architecture | Grado (2025) | Vermeer (Zen3) (2020−2022) |
| PassMark | 36,006 | 38,955+8% |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | — | 11,888 |
Memory & Platform
The EPYC 4345P uses the AM5 socket (PCIe 4.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 5600 on the EPYC 4345P versus DDR4-3200 on the Ryzen 9 5900X — the EPYC 4345P supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (EPYC 4345P) vs 24 (Ryzen 9 5900X) — the EPYC 4345P offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AM5 (EPYC 4345P) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| Socket | AM5 | AM4 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | 5600+139900% | DDR4-3200 |
| Max RAM Capacity | 128 | 128 GB+104857500% |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28+17% | 24 |
Advanced Features
Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the EPYC 4345P supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V, IOMMU (EPYC 4345P) vs AMD-V (Ryzen 9 5900X). The EPYC 4345P includes integrated graphics (AMD Radeon Graphics), while the Ryzen 9 5900X requires a dedicated GPU. Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: EPYC 4345P rivals Xeon E-2488; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | AMD Radeon Graphics | — |
| Unlocked | No | Yes |
| AVX-512 | Yes | No |
| Virtualization | AMD-V, IOMMU | AMD-V |
| Target Use | — | Workstation |
Value Analysis
The EPYC 4345P launched at $329 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($329 vs $350), the EPYC 4345P is $21 cheaper. In terms of value (PassMark points per dollar), the EPYC 4345P delivers 109.4 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 1.7% better value option.
| Feature | EPYC 4345P | Ryzen 9 5900X |
|---|---|---|
| MSRP | $329-40% | $549 |
| Avg Price (30d) | $329-6% | $350 |
| Performance per Dollar | 109.4 | 111.3+2% |
| Release Date | 2025 | 2020 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on EPYC 4345P and Ryzen 9 5900X
