Ryzen 9 9955HX vs Ryzen 9 7945HX
Aggregate performance score
Ryzen 9 7945HX outperforms Ryzen 9 9955HX by a significant 21% 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 | 122 | 184 |
| 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 | 59.63 | 49.39 |
| Designer | AMD | AMD |
| Manufacturer | TSMC | no data |
| Architecture codename | Dragon Range-HX (Zen 4) (2023−2024) | Fire Range-HX (Zen 5) (2025) |
| Release date | 4 January 2023 (2 years ago) | 6 January 2025 (less than a year ago) |
Detailed specifications
Ryzen 9 7945HX 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 | 2.5 GHz | no data |
| Boost clock speed | 5.4 GHz | 5.4 GHz |
| L1 cache | 64K (per core) | 1.3 MB |
| L2 cache | 1 MB (per core) | 16 MB |
| L3 cache | 64 MB (shared) | 64 MB |
| Chip lithography | CCD = 5 nm, I/O = 6 nm | no data |
| Die size | 2x 71 mm2 | no data |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 13,140 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 7945HX 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.
| Number of CPUs in a configuration | 1 | no data |
| Socket | FL1 | no data |
| Power consumption (TDP) | 55 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7945HX 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 | + | - |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 7945HX and Ryzen 9 9955HX are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7945HX 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) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 7945HX and Ryzen 9 9955HX.
| PCIe version | 5.0 | no data |
| PCI Express lanes | 28 | no data |
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.
Geekbench 5.5 Multi-Core
7-Zip Single
7-Zip
CrossMark Overall
WebXPRT 4 Overall
Blender v3.3 Classroom CPU(-)
Geekbench 6.4 Multi-Core
Geekbench 6.4 Single-Core
Pros & cons summary
| Performance score | 34.24 | 28.36 |
| Recency | 4 January 2023 | 6 January 2025 |
Ryzen 9 7945HX has a 20.7% higher aggregate performance score.
Ryzen 9 9955HX, on the other hand, has an age advantage of 2 years.
The AMD Ryzen 9 7945HX is our recommended choice as it beats the AMD Ryzen 9 9955HX in performance tests.
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