AMD Ryzen 9 PRO 7945 vs AMD Ryzen 5 PRO 7645: comparison
Comparison of AMD Ryzen 9 PRO 7945 and AMD Ryzen 5 PRO 7645: key differences and a full specification table.
Key differences
AMD Ryzen 9 PRO 7945 has more cores (12 vs 6), more threads (24 vs 12), a higher maximum clock (5.4 GHz vs 5.1 GHz) and a larger L3 cache (64 MB vs 32 MB).
At the same time, AMD Ryzen 5 PRO 7645 has a higher base clock (3.8 GHz vs 3.7 GHz).
Both processors match on: TDP (65 W), process node (5 nm), maximum memory size (128 GB), memory channels (2), PCIe version (5), maximum integrated graphics clock (2.2 GHz).
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 Ryzen 9 PRO 7945 | AMD Ryzen 5 PRO 7645 |
|---|---|---|
| Cores / threads | 12 / 24 | 6 / 12 |
| Max boost clock | 5.4 GHz | 5.1 GHz |
| L3 cache | 64 MB | 32 MB |
| TDP | 65 W | 65 W |
| Process | 5 nm | 5 nm |
| Integrated graphics | AMD Radeon Graphics | AMD Radeon Graphics |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | AMD Ryzen 9 PRO 7945 | AMD Ryzen 5 PRO 7645 |
|---|---|---|
| General | ||
| Codename | Raphael | Raphael |
| Segment | Desktop | Desktop |
| Architecture | "Zen 4" | "Zen 4" |
| Process | 5 nm | 5 nm |
| Dies per package | 2 | 2 |
| Unlocked for overclocking | No | No |
| Operating system support | Windows 11 - 64-Bit Edition, Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit | Windows 11 - 64-Bit Edition, Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit |
| Regional availability | Global | Global |
| Consumer oriented | Yes | Yes |
| Commercial oriented | Yes | Yes |
| Recommended cooling | AMD Wraith Spire | AMD Wraith Spire |
| CPU | ||
| Cores | 12 | 6 |
| Threads | 24 | 12 |
| Multithreading (SMT/HT) | Yes | Yes |
| Base clock | 3.7 GHz | 3.8 GHz |
| Max boost clock | 5.4 GHz | 5.1 GHz |
| L1 cache | 768 KB | 384 KB |
| L2 cache | 12 MB | 6 MB |
| L3 cache | 64 MB | 32 MB |
| TDP | 65 W | 65 W |
| Instruction set | x86-64 | x86-64 |
| Instruction set extensions | AES, AMD-V, AVX, AVX2, AVX512, FMA3, MMX(+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3, x86-64 | AES, AMD-V, AVX, AVX2, AVX512, FMA3, MMX(+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3, x86-64 |
| Boost technology | Precision Boost 2 | Precision Boost 2 |
| Memory | ||
| Max memory size | 128 GB | 128 GB |
| Memory types | DDR5 | DDR5 |
| Memory channels | 2 | 2 |
| ECC memory supported | Yes | Yes |
| Memory speed (text) | 2x1R | DDR5-5200 | | | 2x2R | DDR5-5200 | | | 4x1R | DDR5-3600 | | | 4x2R | DDR5-3600 | 2x1R | DDR5-5200 | | | 2x2R | DDR5-5200 | | | 4x1R | DDR5-3600 | | | 4x2R | DDR5-3600 |
| Memory form factor | UDIMM | UDIMM |
| Graphics | ||
| Integrated graphics | AMD Radeon Graphics | AMD Radeon Graphics |
| Has integrated graphics | Yes | Yes |
| Graphics max frequency | 2.2 GHz | 2.2 GHz |
| Graphics units | 2 | 2 |
| DisplayPort over USB-C | Yes | Yes |
| I/O and interfaces | ||
| PCI Express revision | 5 | 5 |
| PCI Express lanes | 28 | 28 |
| USB 2.0 ports | 1 | 1 |
| USB 3.2 Gen 2 ports | 4 | 4 |
| NVMe support | Boot, RAID0, RAID1, RAID10 | Boot, RAID0, RAID1, RAID10 |
| Compatible chipsets | A620, X670E, X670, B650E, B650 | A620, X670E, X670, B650E, B650 |
| USB Type-C support | Yes | Yes |
| USB 3.2 Gen 1 ports | 0 | 0 |
| Package and thermal | ||
| Sockets supported | AM5 | AM5 |
| TJUNCTION | 95 °C | 95 °C |
| Die size | 71 mm² | 71 mm² |
| I/O die process | 6 nm | 6 nm |
| I/O die size | 122 mm² | 122 mm² |
| Security and virtualization | ||
| Supported technologies | AMD PRO technologies | AMD PRO technologies |
| AMD PRO technologies | Yes | Yes |
| Technologies | ||
| Precision Boost Overdrive | No | No |
| AMD EXPO memory profiles | No | No |
| Curve Optimizer | No | No |
| Identifiers | ||
| Product ID (OEM) | 100-000000598 | 100-000000600 |
| Product ID (MPK) | 100-100000598MPK | 100-100000600MPK |