Ryzen 5 PRO 8645HS vs Ryzen 9 7900
Primary details
Comparing Ryzen 9 7900 and Ryzen 5 PRO 8645HS processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 118 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 68.22 | no data |
| Market segment | Desktop processor | Server |
| Architecture codename | Raphael (Zen4) | Hawk Point |
| Release date | 14 January 2023 (1 year ago) | 16 April 2024 (less than a year ago) |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 7900 and Ryzen 5 PRO 8645HS 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) | 6 (Hexa-Core) |
| Threads | 24 | 12 |
| Base clock speed | 3.7 GHz | 4.3 GHz |
| Boost clock speed | 5.4 GHz | 5 GHz |
| L1 cache | 768 KB | 64 KB (per core) |
| L2 cache | 12 MB | 1 MB (per core) |
| L3 cache | 64 MB | 16 MB (shared) |
| Chip lithography | 5 nm | 4 nm |
| Die size | 262 mm2 | 178 mm2 |
| Maximum core temperature | 95 °C | no data |
| Maximum case temperature (TCase) | 47 °C | no data |
| Number of transistors | 9.9 Million | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | Yes | No |
Compatibility
Information on Ryzen 9 7900 and Ryzen 5 PRO 8645HS 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 | AM5 (LGA 1718) | FP7 |
| Power consumption (TDP) | 65 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7900 and Ryzen 5 PRO 8645HS. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 5 nm, 0.650 - 1.475V | no data |
| AES-NI | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 7900 and Ryzen 5 PRO 8645HS are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7900 and Ryzen 5 PRO 8645HS. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5200 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon Graphics (Ryzen 7000) | AMD Radeon 760M |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 7900 and Ryzen 5 PRO 8645HS.
| PCIe version | 5.0 | 4.0 |
| PCI Express lanes | 24 | 20 |
Pros & cons summary
| Integrated graphics card | 4.34 | 15.24 |
| Recency | 14 January 2023 | 16 April 2024 |
| Physical cores | 12 | 6 |
| Threads | 24 | 12 |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 65 Watt | 45 Watt |
Ryzen 9 7900 has 100% more physical cores and 100% more threads.
Ryzen 5 PRO 8645HS, on the other hand, has 251.2% faster integrated GPU, an age advantage of 1 year, a 25% more advanced lithography process, and 44.4% lower power consumption.
We couldn't decide between Ryzen 9 7900 and Ryzen 5 PRO 8645HS. We've got no test results to judge.
Note that Ryzen 9 7900 is a desktop processor while Ryzen 5 PRO 8645HS is a server/workstation one.
Should you still have questions on choice between Ryzen 9 7900 and Ryzen 5 PRO 8645HS, ask them in Comments section, and we shall answer.
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