Ryzen 9 9955HX3D vs Ultra 7 255U
Aggregate performance score
Ryzen 9 9955HX3D outperforms Core Ultra 7 255U by a whopping 246% 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 | 890 | 119 |
| 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 | no data | 68.03 |
| Designer | Intel | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Arrow Lake-U (2025) | Fire Range-HX (Zen 5) (2025) |
| Release date | 1 January 2025 (less than a year ago) | 6 January 2025 (less than a year ago) |
Detailed specifications
Core Ultra 7 255U 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 | 12 (Dodeca-Core) | 16 (Hexadeca-Core) |
| Performance-cores | 2 | no data |
| Efficient-cores | 8 | no data |
| Low Power Efficient-cores | 2 | no data |
| Threads | 14 | 32 |
| Base clock speed | 3.8 GHz | 2.5 GHz |
| Boost clock speed | 5.2 GHz | 5.4 GHz |
| L1 cache | no data | 80 KB (per core) |
| L2 cache | no data | 1 MB (per core) |
| L3 cache | 12 MB | 128 MB (shared) |
| Chip lithography | 5 nm | 4 nm |
| Die size | no data | 2x 70.6 mm2 |
| Maximum core temperature | 110 °C | no data |
| Number of transistors | no data | 16,630 million |
| 64 bit support | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Core Ultra 7 255U 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 | FCBGA2049 | FL1 |
| Power consumption (TDP) | 14 MB + 12 MB | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 7 255U and Ryzen 9 9955HX3D. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Speed Shift | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| Thermal Monitoring | + | - |
| Turbo Boost Max 3.0 | - | no data |
| Precision Boost 2 | no data | + |
| Deep Learning Boost | + | - |
| Supported AI Software Frameworks | OpenVINO™, WindowsML, ONNX RT | - |
Security technologies
Core Ultra 7 255U and Ryzen 9 9955HX3D technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core Ultra 7 255U and Ryzen 9 9955HX3D are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 255U and Ryzen 9 9955HX3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | 2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® Graphics | AMD Radeon 610M ( - 2200 MHz) |
| Quick Sync Video | + | - |
| Graphics max frequency | 2.1 GHz | no data |
Graphics interfaces
Available interfaces and connections of Core Ultra 7 255U and Ryzen 9 9955HX3D integrated GPUs.
| Number of displays supported | 4 | no data |
Graphics image quality
Maximum display resolutions supported by Core Ultra 7 255U and Ryzen 9 9955HX3D integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | 4096 x 2304 @ 60Hz (HDMI 2.1 TMDS)7680 x 4320 @ 60Hz (HDMI 2.1 FRL) | no data |
| Max resolution over eDP | 3840 x 2400 @ 120Hz | no data |
| Max resolution over DisplayPort | 7680 x 4320 @ 60Hz | no data |
Graphics API support
APIs supported by Core Ultra 7 255U and Ryzen 9 9955HX3D integrated GPUs, sometimes API versions are included.
| DirectX | 12.2 | no data |
| OpenGL | 4.6 | no data |
Peripherals
Specifications and connection of peripherals supported by Core Ultra 7 255U and Ryzen 9 9955HX3D.
| PCIe version | 4.0 | 5.0 |
| PCI Express lanes | 20 | 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 15 64-bit multi-core
Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.
Pros & cons summary
| Performance score | 10.09 | 34.92 |
| Physical cores | 12 | 16 |
| Threads | 14 | 32 |
| Chip lithography | 5 nm | 4 nm |
| Power consumption (TDP) | 14 Watt | 55 Watt |
Ultra 7 255U has 292.9% lower power consumption.
Ryzen 9 9955HX3D, on the other hand, has a 246.1% higher aggregate performance score, 33.3% more physical cores and 128.6% more threads, and a 25% more advanced lithography process.
The AMD Ryzen 9 9955HX3D is our recommended choice as it beats the Intel Core Ultra 7 255U in performance tests.
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