Ryzen 5 40 vs Ryzen 9 PRO 5945
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 340 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Power efficiency | 12.78 | no data |
| Designer | AMD | AMD |
| Manufacturer | TSMC | TSMC |
| Architecture codename | Vermeer (2020−2025) | Mendocino (2025) |
| Release date | 4 April 2022 (3 years ago) | 1 October 2025 (less than a year ago) |
Detailed specifications
Ryzen 9 PRO 5945 and Ryzen 5 40 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 12 (Dodeca-Core) | 4 (Quad-Core) |
| Threads | 24 | 8 |
| Base clock speed | 3 GHz | 2.8 GHz |
| Boost clock speed | 4.7 GHz | 4.3 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 512 KB (per core) | 512 KB (per core) |
| L3 cache | 64 MB | 4 MB (shared) |
| Chip lithography | 7 nm | 6 nm |
| Die size | 2x 74 mm2 | 100 mm2 |
| Maximum case temperature (TCase) | 95 °C | no data |
| Number of transistors | 8,300 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on Ryzen 9 PRO 5945 and Ryzen 5 40 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | AM4 | FT6 |
| Power consumption (TDP) | 65 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 PRO 5945 and Ryzen 5 40. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 PRO 5945 and Ryzen 5 40 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 PRO 5945 and Ryzen 5 40. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | LPDDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | AMD Radeon 610M |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 PRO 5945 and Ryzen 5 40.
| PCIe version | 4.0 | 3.0 |
| PCI Express lanes | 20 | 4 |
Pros & cons summary
| Recency | 4 April 2022 | 1 October 2025 |
| Physical cores | 12 | 4 |
| Threads | 24 | 8 |
| Chip lithography | 7 nm | 6 nm |
| Power consumption (TDP) | 65 Watt | 15 Watt |
Ryzen 9 PRO 5945 has 200% more physical cores and 200% more threads.
Ryzen 5 40, on the other hand, has an age advantage of 3 years, a 16.7% more advanced lithography process, and 333.3% lower power consumption.
We couldn't decide between AMD Ryzen 9 PRO 5945 and AMD Ryzen 5 40. We've got no test results to judge.
Note that Ryzen 9 PRO 5945 is a desktop processor while Ryzen 5 40 is a notebook one.
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