Ryzen 9 7945HX3D vs Ryzen 7 7840H
Aggregate performance score
Ryzen 9 7945HX3D outperforms Ryzen 7 7840H by a whopping 103% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 7 7840H and Ryzen 9 7945HX3D processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 349 | 99 |
| 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 | 48.13 | 62.20 |
| Architecture codename | Phoenix (2023−2024) | Dragon Range-HX (Zen 4) (2023−2024) |
| Release date | January 2023 (1 year ago) | 27 July 2023 (1 year ago) |
Detailed specifications
Ryzen 7 7840H and Ryzen 9 7945HX3D 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 | 8 (Octa-Core) | 16 (Hexadeca-Core) |
| Threads | 16 | 32 |
| Base clock speed | 3.8 GHz | 2.3 GHz |
| Boost clock speed | 5.1 GHz | 5.4 GHz |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 16 MB (shared) | 128 MB (shared) |
| Chip lithography | 4 nm | 5 nm |
| Die size | 178 mm2 | 2x 71 mm2 |
| Maximum core temperature | no data | 89 °C |
| Number of transistors | 25,000 million | 17,840 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 7 7840H and Ryzen 9 7945HX3D 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 | FP8 | FL1 |
| Power consumption (TDP) | 35 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 7 7840H and Ryzen 9 7945HX3D. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 7 7840H and Ryzen 9 7945HX3D are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 7 7840H and Ryzen 9 7945HX3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5600 | DDR5-5200 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon 780M | AMD Radeon 610M (400 - 2200 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 7 7840H and Ryzen 9 7945HX3D.
| PCIe version | 4.0 | 5.0 |
| PCI Express lanes | 20 | 28 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 17.80 | 36.15 |
| Integrated graphics card | 18.32 | 2.85 |
| Physical cores | 8 | 16 |
| Threads | 16 | 32 |
| Chip lithography | 4 nm | 5 nm |
| Power consumption (TDP) | 35 Watt | 55 Watt |
Ryzen 7 7840H has 542.8% faster integrated GPU, a 25% more advanced lithography process, and 57.1% lower power consumption.
Ryzen 9 7945HX3D, on the other hand, has a 103.1% higher aggregate performance score, and 100% more physical cores and 100% more threads.
The Ryzen 9 7945HX3D is our recommended choice as it beats the Ryzen 7 7840H in performance tests.
Should you still have questions on choice between Ryzen 7 7840H and Ryzen 9 7945HX3D, ask them in Comments section, and we shall answer.
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