EPYC 7662 vs EPYC 7643
EPYC 7662
EPYC 7643
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 7662
Performance Per Dollar EPYC 7643
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 7662 | EPYC 7643 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($1,266) | ⚠️ Higher cost ($2,750) |
| Longevity | ✨ Modern (Zen 2 (2017−2020) / 7 nm, 14 nm) | ✨ Modern (Milan (2021−2023) / 7 nm+) |
💎 Value Proposition
| Insight | EPYC 7662 | EPYC 7643 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+107%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($1,266) | ⚠️ Higher cost ($2,750) |
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 7662 and EPYC 7643
EPYC 7662
The EPYC 7662 is manufactured by AMD. It was released in 2020-02-19. It is based on the Zen 2 (2017−2020) architecture. It features 64 cores and 128 threads. Base frequency is 2 GHz, with boost up to 3.3 GHz. L3 cache: 256 MB. L2 cache: 32 MB. Built on 7 nm, 14 nm process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4-3200. Passmark benchmark score: 72,298 points. Launch price was $6,700.
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.
Processing Power
The EPYC 7662 packs 64 cores / 128 threads, while the EPYC 7643 offers 48 cores / 96 threads — the EPYC 7662 has 16 more cores. Boost clocks reach 3.3 GHz on the EPYC 7662 versus 3.6 GHz on the EPYC 7643 — a 8.7% clock advantage for the EPYC 7643 (base: 2 GHz vs 2.3 GHz). The EPYC 7662 uses the Zen 2 (2017−2020) architecture (7 nm, 14 nm), while the EPYC 7643 uses Milan (2021−2023) (7 nm+). In PassMark, the EPYC 7662 scores 72,298 against the EPYC 7643's 76,050 — a 5.1% lead for the EPYC 7643. L3 cache: 256 MB on the EPYC 7662 vs 256 MB (total) on the EPYC 7643.
| Feature | EPYC 7662 | EPYC 7643 |
|---|---|---|
| Cores / Threads | 64 / 128+33% | 48 / 96 |
| Boost Clock | 3.3 GHz | 3.6 GHz+9% |
| Base Clock | 2 GHz | 2.3 GHz+15% |
| L3 Cache | 256 MB | 256 MB (total) |
| L2 Cache | 32 MB+6300% | 512 kB (per core) |
| Process | 7 nm, 14 nm | 7 nm+ |
| Architecture | Zen 2 (2017−2020) | Milan (2021−2023) |
| PassMark | 72,298 | 76,050+5% |
| Geekbench 6 Single | — | 1,671 |
| Geekbench 6 Multi | — | 15,000 |
Memory & Platform
Both processors use the SP3 socket with PCIe 4.0. Maximum memory speed reaches 3200 on the EPYC 7662 versus DDR4-3200 on the EPYC 7643 — the EPYC 7662 supports 199.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 7662 supports up to 4096 of RAM compared to 4 TB — 199.6% more capacity for professional workloads. Both feature 8-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP3 (EPYC 7662) and SP3 (EPYC 7643).
| Feature | EPYC 7662 | EPYC 7643 |
|---|---|---|
| Socket | SP3 | SP3 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| Max RAM Speed | 3200+79900% | DDR4-3200 |
| Max RAM Capacity | 4096 | 4 TB+104857500% |
| RAM Channels | 8 | 8 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128 | 128 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x, VT-d (EPYC 7662) vs AMD-V (EPYC 7643). Primary use case: EPYC 7643 targets Server. Direct competitor: EPYC 7662 rivals Xeon Platinum 8280; EPYC 7643 rivals EPYC 7443P.
| Feature | EPYC 7662 | EPYC 7643 |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d | AMD-V |
| Target Use | — | Server |
Value Analysis
The EPYC 7662 launched at $6150 MSRP, while the EPYC 7643 debuted at $4995. At current prices ($1266 vs $2750), the EPYC 7662 is $1484 cheaper. In terms of value (PassMark points per dollar), the EPYC 7662 delivers 57.1 pts/$ vs 27.7 pts/$ for the EPYC 7643 — making the EPYC 7662 the 69.5% better value option.
| Feature | EPYC 7662 | EPYC 7643 |
|---|---|---|
| MSRP | $6150 | $4995-19% |
| Avg Price (30d) | $1266-54% | $2750 |
| Performance per Dollar | 57.1+106% | 27.7 |
| Release Date | 2020 | 2021 |
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