Ryzen 9 9950X3D vs i7-1255U
Primary details
Comparing Core i7-1255U and Ryzen 9 9950X3D processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 895 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Alder Lake-M | no data |
| Power efficiency | 53.78 | no data |
| Architecture codename | Alder Lake-U (2022) | Granite Ridge (2024−2025) |
| Release date | 23 February 2022 (2 years ago) | 2025 (recently) |
Detailed specifications
Core i7-1255U and Ryzen 9 9950X3D 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 | 10 (Deca-Core) | 16 (Hexadeca-Core) |
| Threads | 12 | 32 |
| Base clock speed | 1.7 GHz | 4 GHz |
| Boost clock speed | 4.7 GHz | 5.6 GHz |
| L1 cache | 80K (per core) | 80 KB (per core) |
| L2 cache | 1.25 MB (per core) | 1 MB (per core) |
| L3 cache | 12 MB (shared) | 128 MB (shared) |
| Chip lithography | 10 nm | 4 nm |
| Die size | no data | 2x 70.6 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | no data | 16,630 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Core i7-1255U and Ryzen 9 9950X3D 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 | 1 |
| Socket | Intel BGA 1744 | AM5 |
| Power consumption (TDP) | 15 Watt | 170 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-1255U and Ryzen 9 9950X3D. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| TSX | + | - |
| Precision Boost 2 | no data | + |
Security technologies
Core i7-1255U and Ryzen 9 9950X3D technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-1255U and Ryzen 9 9950X3D are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Ryzen 9 9950X3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4, DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz) | AMD Radeon Graphics |
Peripherals
Specifications and connection of peripherals supported by Core i7-1255U and Ryzen 9 9950X3D.
| PCIe version | 4.0 | 5.0 |
| PCI Express lanes | 20 | 24 |
Pros & cons summary
| Integrated graphics card | 9.21 | 1.98 |
| Physical cores | 10 | 16 |
| Threads | 12 | 32 |
| Chip lithography | 10 nm | 4 nm |
| Power consumption (TDP) | 15 Watt | 170 Watt |
i7-1255U has 365.2% faster integrated GPU, and 1033.3% lower power consumption.
Ryzen 9 9950X3D, on the other hand, has 60% more physical cores and 166.7% more threads, and a 150% more advanced lithography process.
We couldn't decide between Core i7-1255U and Ryzen 9 9950X3D. We've got no test results to judge.
Be aware that Core i7-1255U is a notebook processor while Ryzen 9 9950X3D is a desktop one.
Should you still have questions on choice between Core i7-1255U and Ryzen 9 9950X3D, ask them in Comments section, and we shall answer.
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