Ryzen 9 7840HX vs Ryzen 5 8645HS
Primary details
Comparing Ryzen 5 8645HS and Ryzen 9 7840HX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 499 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | no data | AMD Dragon Range (Zen 4, Ryzen 7045) |
| Power efficiency | 30.22 | no data |
| Architecture codename | Hawk Point-HS (Zen 4) (2023−2024) | Dragon Range-HX (Zen 4) (2023−2024) |
| Release date | 6 December 2023 (less than a year ago) | 17 January 2024 (less than a year ago) |
Detailed specifications
Ryzen 5 8645HS and Ryzen 9 7840HX 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 | 6 (Hexa-Core) | 12 (Dodeca-Core) |
| Threads | 12 | 24 |
| Base clock speed | 4.3 GHz | 2.9 GHz |
| Boost clock speed | 5 GHz | 5.1 GHz |
| L1 cache | 64 KB (per core) | 768 KB |
| L2 cache | 1 MB (per core) | 12 MB |
| L3 cache | 16 MB (shared) | 64 MB |
| Chip lithography | 4 nm | 5 nm |
| Die size | 178 mm2 | no data |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | 25,000 million | 9900 Million |
| 64 bit support | + | + |
Compatibility
Information on Ryzen 5 8645HS and Ryzen 9 7840HX 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 | no data |
| Socket | FP8 | FL1 |
| Power consumption (TDP) | 45 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 5 8645HS and Ryzen 9 7840HX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3 | MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME |
| AES-NI | + | + |
| FMA | - | + |
| AVX | + | + |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 5 8645HS and Ryzen 9 7840HX are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 5 8645HS and Ryzen 9 7840HX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon 760M ( - 2600 MHz) | AMD Radeon 610M (400 - 2200 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 5 8645HS and Ryzen 9 7840HX.
| PCIe version | 4.0 | no data |
| PCI Express lanes | 20 | no data |
Pros & cons summary
| Integrated graphics card | 14.90 | 2.85 |
| Recency | 6 December 2023 | 17 January 2024 |
| Physical cores | 6 | 12 |
| Threads | 12 | 24 |
| Chip lithography | 4 nm | 5 nm |
| Power consumption (TDP) | 45 Watt | 55 Watt |
Ryzen 5 8645HS has 422.8% faster integrated GPU, a 25% more advanced lithography process, and 22.2% lower power consumption.
Ryzen 9 7840HX, on the other hand, has an age advantage of 1 month, and 100% more physical cores and 100% more threads.
We couldn't decide between Ryzen 5 8645HS and Ryzen 9 7840HX. We've got no test results to judge.
Should you still have questions on choice between Ryzen 5 8645HS and Ryzen 9 7840HX, ask them in Comments section, and we shall answer.
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