Ryzen 7 7840H vs Ryzen 9 8945H
Aggregate performance score
Ryzen 9 8945H outperforms Ryzen 7 7840H by a small 6% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 8945H and Ryzen 7 7840H processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 307 | 341 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Hawk Point (Zen 4/4c, Ryzen 8040) | no data |
| Power efficiency | 39.87 | 48.32 |
| Architecture codename | Hawk Point-HS (Zen 4) (2023−2024) | Phoenix (2023−2024) |
| Release date | 6 December 2023 (less than a year ago) | January 2023 (1 year ago) |
Detailed specifications
Ryzen 9 8945H and Ryzen 7 7840H 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) | 8 (Octa-Core) |
| Threads | 16 | 16 |
| Base clock speed | 4 GHz | 3.8 GHz |
| Boost clock speed | 5.2 GHz | 5.1 GHz |
| L1 cache | 512 KB | 64K (per core) |
| L2 cache | 8 MB | 1 MB (per core) |
| L3 cache | 16 MB | 16 MB (shared) |
| Chip lithography | 4 nm | 4 nm |
| Die size | 178 mm2 | 178 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | no data | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | + |
Compatibility
Information on Ryzen 9 8945H and Ryzen 7 7840H 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 | no data | 1 |
| Socket | FP7/FP7r2/FP8 | FP8 |
| Power consumption (TDP) | 45 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 8945H and Ryzen 7 7840H. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Ryzen AI, 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 | no data |
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 8945H and Ryzen 7 7840H are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 8945H and Ryzen 7 7840H. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5-5600 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 780M | AMD Radeon 780M |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 8945H and Ryzen 7 7840H.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
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 | 18.96 | 17.87 |
| Power consumption (TDP) | 45 Watt | 35 Watt |
Ryzen 9 8945H has a 6.1% higher aggregate performance score.
Ryzen 7 7840H, on the other hand, has 28.6% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Ryzen 9 8945H and Ryzen 7 7840H.
Should you still have questions on choice between Ryzen 9 8945H and Ryzen 7 7840H, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
