EPYC 7643 vs EPYC 9354
EPYC 7643
EPYC 9354
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 EPYC 9354
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7643 | EPYC 9354 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($2,750) | ✅ More affordable ($2,498) |
| Longevity | ✨ Modern (Milan (2021−2023) / 7 nm+) | ✨ Modern (Genoa (2022−2023) / 5 nm, 6 nm) |
💎 Value Proposition
| Insight | EPYC 7643 | EPYC 9354 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+7%) |
| Upfront Cost | ⚠️ Higher cost ($2,750) | ✅ More affordable ($2,498) |
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 EPYC 9354
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.
EPYC 9354
The EPYC 9354 is manufactured by AMD. It was released in 10 November 2022 (3 years ago). It is based on the Genoa (2022−2023) architecture. It features 32 cores and 64 threads. Base frequency is 3.25 GHz, with boost up to 3.8 GHz. L3 cache: 256 MB (total). L2 cache: 1 MB (per core). Built on 5 nm, 6 nm process technology. Socket: SP5. Thermal design power (TDP): 280 Watt. Memory support: DDR5-4800. Passmark benchmark score: 73,892 points. Launch price was $3,420.
Processing Power
The EPYC 7643 packs 48 cores / 96 threads, while the EPYC 9354 offers 32 cores / 64 threads — the EPYC 7643 has 16 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643 versus 3.8 GHz on the EPYC 9354 — a 5.4% clock advantage for the EPYC 9354 (base: 2.3 GHz vs 3.25 GHz). The EPYC 7643 uses the Milan (2021−2023) architecture (7 nm+), while the EPYC 9354 uses Genoa (2022−2023) (5 nm, 6 nm). In PassMark, the EPYC 7643 scores 76,050 against the EPYC 9354's 73,892 — a 2.9% lead for the EPYC 7643. Both processors carry 256 MB (total) of L3 cache.
| Feature | EPYC 7643 | EPYC 9354 |
|---|---|---|
| Cores / Threads | 48 / 96+50% | 32 / 64 |
| Boost Clock | 3.6 GHz | 3.8 GHz+6% |
| Base Clock | 2.3 GHz | 3.25 GHz+41% |
| L3 Cache | 256 MB (total) | 256 MB (total) |
| L2 Cache | 512 kB (per core) | 1 MB (per core)+100% |
| Process | 7 nm+ | 5 nm, 6 nm-29% |
| Architecture | Milan (2021−2023) | Genoa (2022−2023) |
| PassMark | 76,050+3% | 73,892 |
| Geekbench 6 Single | 1,671 | — |
| Geekbench 6 Multi | 15,000 | — |
Memory & Platform
The EPYC 7643 uses the SP3 socket (PCIe 4.0), while the EPYC 9354 uses SP5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-3200 on the EPYC 7643 versus 4800 on the EPYC 9354 — the EPYC 9354 supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 9354 supports up to 6144 of RAM compared to 4 TB — 199.7% more capacity for professional workloads. Memory channels: 8 (EPYC 7643) vs 12 (EPYC 9354). Both provide 128 PCIe lanes. Chipset compatibility: SP3 (EPYC 7643) and SP5 (EPYC 9354).
| Feature | EPYC 7643 | EPYC 9354 |
|---|---|---|
| Socket | SP3 | SP5 |
| PCIe Generation | PCIe 4.0 | PCIe 5.0+25% |
| Max RAM Speed | DDR4-3200 | 4800+119900% |
| Max RAM Capacity | 4 TB+69904967% | 6144 |
| RAM Channels | 8 | 12+50% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128 | 128 |
Advanced Features
Neither processor supports overclocking. Only the EPYC 9354 supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (EPYC 7643) vs VT-x, VT-d, SEV-SNP (EPYC 9354). Primary use case: EPYC 7643 targets Server. Direct competitor: EPYC 7643 rivals EPYC 7443P; EPYC 9354 rivals Xeon Platinum 8468.
| Feature | EPYC 7643 | EPYC 9354 |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | No | Yes |
| Virtualization | AMD-V | VT-x, VT-d, SEV-SNP |
| Target Use | Server | — |
Value Analysis
The EPYC 7643 launched at $4995 MSRP, while the EPYC 9354 debuted at $3420. At current prices ($2750 vs $2498), the EPYC 9354 is $252 cheaper. In terms of value (PassMark points per dollar), the EPYC 7643 delivers 27.7 pts/$ vs 29.6 pts/$ for the EPYC 9354 — making the EPYC 9354 the 6.7% better value option.
| Feature | EPYC 7643 | EPYC 9354 |
|---|---|---|
| MSRP | $4995 | $3420-32% |
| Avg Price (30d) | $2750 | $2498-9% |
| Performance per Dollar | 27.7 | 29.6+7% |
| Release Date | 2021 | 2022 |
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