EPYC 7643 vs Ryzen 7 3700X
EPYC 7643
Ryzen 7 3700X
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 7643
Performance Per Dollar Ryzen 7 3700X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($2,750) | ✅ More affordable ($140) |
| Longevity | ✨ Modern (Milan (2021−2023) / 7 nm+) | ✨ Modern (Matisse (Zen 2) (2019−2020) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+479%) |
| Upfront Cost | ⚠️ Higher cost ($2,750) | ✅ More affordable ($140) |
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 7643 and Ryzen 7 3700X
EPYC 7643
The EPYC 7643 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 48 cores and 96 threads. Base frequency is 2.3 GHz, with boost up to 3.6 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: 76,050 points. Launch price was $4,995.
Ryzen 7 3700X
The Ryzen 7 3700X is manufactured by AMD. It was released in 7 July 2019 (6 years ago). It is based on the Matisse (Zen 2) (2019−2020) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 4.4 GHz. L3 cache: 32 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 65 Watt. Memory support: DDR4 Dual-channel. Passmark benchmark score: 22,430 points. Launch price was $329.
Processing Power
The EPYC 7643 packs 48 cores / 96 threads, while the Ryzen 7 3700X offers 8 cores / 16 threads — the EPYC 7643 has 40 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643 versus 4.4 GHz on the Ryzen 7 3700X — a 20% clock advantage for the Ryzen 7 3700X (base: 2.3 GHz vs 3.6 GHz). The EPYC 7643 uses the Milan (2021−2023) architecture (7 nm+), while the Ryzen 7 3700X uses Matisse (Zen 2) (2019−2020) (7 nm, 12 nm). In PassMark, the EPYC 7643 scores 76,050 against the Ryzen 7 3700X's 22,430 — a 108.9% lead for the EPYC 7643. L3 cache: 256 MB (total) on the EPYC 7643 vs 32 MB on the Ryzen 7 3700X.
| Feature | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| Cores / Threads | 48 / 96+500% | 8 / 16 |
| Boost Clock | 3.6 GHz | 4.4 GHz+22% |
| Base Clock | 2.3 GHz | 3.6 GHz+57% |
| L3 Cache | 256 MB (total)+700% | 32 MB |
| L2 Cache | 512 kB (per core) | 512K (per core) |
| Process | 7 nm+ | 7 nm, 12 nm |
| Architecture | Milan (2021−2023) | Matisse (Zen 2) (2019−2020) |
| PassMark | 76,050+239% | 22,430 |
| Geekbench 6 Single | 1,671 | — |
| Geekbench 6 Multi | 15,000 | — |
Memory & Platform
The EPYC 7643 uses the SP3 socket (PCIe 4.0), while the Ryzen 7 3700X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR4-3200 memory speed. The Ryzen 7 3700X supports up to 128 GB of RAM compared to 4 TB — 187.9% more capacity for professional workloads. Memory channels: 8 (EPYC 7643) vs 2 (Ryzen 7 3700X). PCIe lanes: 128 (EPYC 7643) vs 24 (Ryzen 7 3700X) — the EPYC 7643 offers 104 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP3 (EPYC 7643) and AMD 500 series,AMD 400 series,AMD 300 series (Ryzen 7 3700X).
| Feature | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| Socket | SP3 | AM4 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR4-3200 | DDR4-3200 |
| Max RAM Capacity | 4 TB+3100% | 128 GB |
| RAM Channels | 8+300% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128+433% | 24 |
Advanced Features
Virtualization: AMD-V (EPYC 7643) / not specified (Ryzen 7 3700X). Primary use case: EPYC 7643 targets Server. Direct competitor: EPYC 7643 rivals EPYC 7443P.
| Feature | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | AMD-V | — |
| Target Use | Server | — |
Value Analysis
The EPYC 7643 launched at $4995 MSRP, while the Ryzen 7 3700X debuted at $329. At current prices ($2750 vs $140), the Ryzen 7 3700X is $2610 cheaper. In terms of value (PassMark points per dollar), the EPYC 7643 delivers 27.7 pts/$ vs 160.2 pts/$ for the Ryzen 7 3700X — making the Ryzen 7 3700X the 141.1% better value option.
| Feature | EPYC 7643 | Ryzen 7 3700X |
|---|---|---|
| MSRP | $4995 | $329-93% |
| Avg Price (30d) | $2750 | $140-95% |
| Performance per Dollar | 27.7 | 160.2+478% |
| Release Date | 2021 | 2019 |
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