Ryzen 9 9955HX3D vs Ryzen 9 8945H
Aggregate performance score
Ryzen 9 9955HX3D outperforms Ryzen 9 8945H by a whopping 104% 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 | 427 | 120 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Hawk Point (Zen 4/4c, Ryzen 8040) | AMD Dragon Range (Zen 4, Ryzen 7045) |
| Power efficiency | no data | 68.09 |
| Designer | AMD | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Hawk Point-HS (Zen 4) (2023−2024) | Fire Range-HX (Zen 5) (2025) |
| Release date | 6 December 2023 (1 year ago) | 6 January 2025 (less than a year ago) |
Detailed specifications
Ryzen 9 8945H and Ryzen 9 9955HX3D 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 | 4 GHz | 2.5 GHz |
| Boost clock speed | 5.2 GHz | 5.4 GHz |
| L1 cache | 512 KB | 80 KB (per core) |
| L2 cache | 8 MB | 1 MB (per core) |
| L3 cache | 16 MB | 128 MB (shared) |
| Chip lithography | 4 nm | 4 nm |
| Die size | 178 mm2 | 2x 70.6 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | no data | 16,630 million |
| 64 bit support | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 9 8945H and Ryzen 9 9955HX3D 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 | FL1 |
| Power consumption (TDP) | 8 MB + 16 MB | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 8945H and Ryzen 9 9955HX3D. 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 9 9955HX3D are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 8945H and Ryzen 9 9955HX3D. 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 | AMD Radeon 780M ( - 2800 MHz) | AMD Radeon 610M ( - 2200 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 8945H and Ryzen 9 9955HX3D.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 28 |
Synthetic benchmarks
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.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Cinebench 15 64-bit multi-core
Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.
Cinebench 15 64-bit single-core
Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.
TrueCrypt AES
TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.
x264 encoding pass 2
x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.
x264 encoding pass 1
x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.
Pros & cons summary
| Performance score | 17.15 | 34.93 |
| Integrated graphics card | 16.35 | 2.74 |
| Recency | 6 December 2023 | 6 January 2025 |
| Physical cores | 8 | 16 |
| Threads | 16 | 32 |
| Power consumption (TDP) | 8 Watt | 55 Watt |
Ryzen 9 8945H has 496.7% faster integrated GPU, and 587.5% lower power consumption.
Ryzen 9 9955HX3D, on the other hand, has a 103.7% higher aggregate performance score, an age advantage of 1 year, and 100% more physical cores and 100% more threads.
The AMD Ryzen 9 9955HX3D is our recommended choice as it beats the AMD Ryzen 9 8945H in performance tests.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
