AMD EPYC 7663 vs AMD EPYC 7643: comparison
Comparison of AMD EPYC 7663 and AMD EPYC 7643: key differences and a full specification table.
Key differences
AMD EPYC 7663 has more cores (56 vs 48) and more threads (112 vs 96).
At the same time, AMD EPYC 7643 has a higher base clock (2.3 GHz vs 2 GHz), a higher maximum clock (3.6 GHz vs 3.5 GHz) and a lower TDP (225 W vs 240 W).
Both processors match on: L3 cache (256 MB), memory channels (8), PCIe version (4).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | AMD EPYC 7663 | AMD EPYC 7643 |
|---|---|---|
| Cores / threads | 56 / 112 | 48 / 96 |
| Max boost clock | 3.5 GHz | 3.6 GHz |
| L3 cache | 256 MB | 256 MB |
| TDP | 240 W | 225 W |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | AMD EPYC 7663 | AMD EPYC 7643 |
|---|---|---|
| General | ||
| Segment | Server | Server |
| Product line | AMD EPYC 7003 Series | AMD EPYC 7003 Series |
| Product family | AMD EPYC | AMD EPYC |
| Launch date | 03/15/2021 | 03/15/2021 |
| Recommended customer price | 6.366 USD | 4.995 USD |
| Target workloads | Analytics, App dev/test, CAE/CFD/FEA, ERM/SCM/CRM apps, High capacity data mgmt (NR/RDBMS), VDI, VM Density | Analytics, App dev/test, CAE/CFD/FEA, ERM/SCM/CRM apps, High capacity data mgmt (NR/RDBMS), VDI, VM Density |
| CPU | ||
| Cores | 56 | 48 |
| Threads | 112 | 96 |
| Base clock | 2 GHz | 2.3 GHz |
| Max boost clock | 3.5 GHz | 3.6 GHz |
| L3 cache | 256 MB | 256 MB |
| TDP | 240 W | 225 W |
| Configurable TDP | 225–240 W | 225–240 W |
| Memory | ||
| Memory types | DDR4 | DDR4 |
| Memory channels | 8 | 8 |
| Max memory speed | 3.2 GHz | 3.2 GHz |
| Max memory bandwidth | 204.8 GB/s | 204.8 GB/s |
| Graphics | ||
| Has integrated graphics | No | No |
| I/O and interfaces | ||
| PCI Express revision | 4 | 4 |
| Package and thermal | ||
| Sockets supported | SP3 | SP3 |
| Max CPU configuration | 2 | 2 |
| Security and virtualization | ||
| Supported technologies | AMD Infinity Guard, AMD Infinity Architecture | AMD Infinity Guard, AMD Infinity Architecture |
| Identifiers | ||
| Product ID (OEM) | 100-000000318 | 100-000000326 |