Ryzen 9 9955HX vs Ryzen 9 7940HX
Aggregate performance score
Ryzen 9 9955HX outperforms Ryzen 9 7940HX by a small 8% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 136 | 110 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Dragon Range (Zen 4, Ryzen 7045) | AMD Dragon Range (Zen 4, Ryzen 7045) |
| Power efficiency | 59.35 | 63.84 |
| Designer | AMD | AMD |
| Architecture codename | Dragon Range-HX (Zen 4) (2023−2024) | Fire Range-HX (Zen 5) (2025) |
| Release date | 17 January 2024 (1 year ago) | 6 January 2025 (less than a year ago) |
Detailed specifications
Ryzen 9 7940HX and Ryzen 9 9955HX 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 | 16 (Hexadeca-Core) | 16 (Hexadeca-Core) |
| Threads | 32 | 32 |
| Base clock speed | 2.4 GHz | no data |
| Boost clock speed | 5.2 GHz | 5.4 GHz |
| L1 cache | 1 MB | 1.3 MB |
| L2 cache | 16 MB | 16 MB |
| L3 cache | 64 MB | 64 MB |
| Chip lithography | 5 nm | no data |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 9900 Million | no data |
| 64 bit support | + | + |
Compatibility
Information on Ryzen 9 7940HX and Ryzen 9 9955HX 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.
| Socket | FL1 | no data |
| Power consumption (TDP) | 55 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7940HX and Ryzen 9 9955HX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 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 | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7940HX and Ryzen 9 9955HX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 610M (400 - 2200 MHz) | AMD Radeon 610M ( - 2200 MHz) |
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.
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. Other than that, Passmark measures multi-core performance.
Geekbench 6.4 Multi-Core
Pros & cons summary
| Performance score | 33.86 | 36.42 |
| Recency | 17 January 2024 | 6 January 2025 |
Ryzen 9 9955HX has a 7.6% higher aggregate performance score, and an age advantage of 11 months.
Given the minimal performance differences, no clear winner can be declared between AMD Ryzen 9 7940HX and AMD Ryzen 9 9955HX.
Other comparisons
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