EPYC 7663 vs EPYC 7643P
EPYC 7663
EPYC 7643P
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 7663
Performance Per Dollar EPYC 7643P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7663 | EPYC 7643P |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($6,366) | ✅ More affordable ($2,722) |
| Longevity | ✨ Modern (Milan (2021−2023) / 7 nm+) | ✨ Modern (Milan (2021−2023) / 7 nm) |
💎 Value Proposition
| Insight | EPYC 7663 | EPYC 7643P |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+120%) |
| Upfront Cost | ⚠️ Higher cost ($6,366) | ✅ More affordable ($2,722) |
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 7663 and EPYC 7643P
EPYC 7663
The EPYC 7663 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 56 cores and 112 threads. Base frequency is 2 GHz, with boost up to 3.5 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 240 Watt. Memory support: DDR4-3200. Passmark benchmark score: 82,120 points. Launch price was $6,366.
EPYC 7643P
The EPYC 7643P is manufactured by AMD. It was released in 5 September 2023 (2 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. Passmark benchmark score: 77,307 points. Launch price was $2,722.
Processing Power
The EPYC 7663 packs 56 cores / 112 threads, while the EPYC 7643P offers 48 cores / 96 threads — the EPYC 7663 has 8 more cores. Boost clocks reach 3.5 GHz on the EPYC 7663 versus 3.6 GHz on the EPYC 7643P — a 2.8% clock advantage for the EPYC 7643P (base: 2 GHz vs 2.3 GHz). Both are built on the Milan (2021−2023) architecture using a 7 nm+ process. In PassMark, the EPYC 7663 scores 82,120 against the EPYC 7643P's 77,307 — a 6% lead for the EPYC 7663. Both processors carry 256 MB (total) of L3 cache.
| Feature | EPYC 7663 | EPYC 7643P |
|---|---|---|
| Cores / Threads | 56 / 112+17% | 48 / 96 |
| Boost Clock | 3.5 GHz | 3.6 GHz+3% |
| Base Clock | 2 GHz | 2.3 GHz+15% |
| L3 Cache | 256 MB (total) | 256 MB (total) |
| L2 Cache | 512 kB (per core) | 512 kB (per core) |
| Process | 7 nm+ | 7 nm |
| Architecture | Milan (2021−2023) | Milan (2021−2023) |
| PassMark | 82,120+6% | 77,307 |
| Geekbench 6 Single | 1,370 | — |
| Geekbench 6 Multi | 12,380 | — |
Memory & Platform
Both processors use the SP3 socket with PCIe 4.0. Maximum memory speed reaches DDR4-3200 on the EPYC 7663 versus 3200 on the EPYC 7643P — the EPYC 7643P supports 199.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4096 GB of RAM. Both feature 8-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP3 (EPYC 7663) and SP3 (EPYC 7643P).
| Feature | EPYC 7663 | EPYC 7643P |
|---|---|---|
| Socket | SP3 | SP3 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | DDR4-3200 | 3200+79900% |
| Max RAM Capacity | 4096 GB+104857500% | 4096 |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128 | 128 |
Advanced Features
Neither processor supports overclocking. Virtualization support: AMD-V (EPYC 7663) vs VT-x, VT-d, SEV (EPYC 7643P). Primary use case: EPYC 7663 targets Server. Direct competitor: EPYC 7663 rivals Xeon Platinum 8380; EPYC 7643P rivals Xeon Platinum 8380.
| Feature | EPYC 7663 | EPYC 7643P |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x, VT-d, SEV |
| Target Use | Server | — |
Value Analysis
The EPYC 7663 launched at $6366 MSRP, while the EPYC 7643P debuted at $2722. At current prices ($6366 vs $2722), the EPYC 7643P is $3644 cheaper. In terms of value (PassMark points per dollar), the EPYC 7663 delivers 12.9 pts/$ vs 28.4 pts/$ for the EPYC 7643P — making the EPYC 7643P the 75.1% better value option.
| Feature | EPYC 7663 | EPYC 7643P |
|---|---|---|
| MSRP | $6366 | $2722-57% |
| Avg Price (30d) | $6366 | $2722-57% |
| Performance per Dollar | 12.9 | 28.4+120% |
| Release Date | 2021 | 2023 |
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