i9-12900HX vs i7-1255U
Aggregate performance score
Core i9-12900HX outperforms Core i7-1255U by a whopping 149% based on our aggregate benchmark results.
Primary details
Comparing Core i7-1255U and Core i9-12900HX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 896 | 259 |
| Place by popularity | 74 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Alder Lake-M | no data |
| Power efficiency | 53.78 | 36.52 |
| Architecture codename | Alder Lake-U (2022) | Alder Lake-HX (2022) |
| Release date | 23 February 2022 (2 years ago) | 10 May 2022 (2 years ago) |
Detailed specifications
Core i7-1255U and Core i9-12900HX 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 | 24 |
| Base clock speed | 1.7 GHz | 2.3 GHz |
| Boost clock speed | 4.7 GHz | 5 GHz |
| L1 cache | 80K (per core) | 80K (per core) |
| L2 cache | 1.25 MB (per core) | 1.25 MB (per core) |
| L3 cache | 12 MB (shared) | 30 MB (shared) |
| Chip lithography | 10 nm | Intel 7 nm |
| Die size | no data | 215 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Core i7-1255U and Core i9-12900HX 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 | FCBGA1964 |
| Power consumption (TDP) | 15 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-1255U and Core i9-12900HX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| FMA | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Hyper-Threading Technology | no data | + |
| TSX | + | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Turbo Boost Max 3.0 | no data | + |
| Deep Learning Boost | - | + |
Security technologies
Core i7-1255U and Core i9-12900HX technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-1255U and Core i9-12900HX are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Core i9-12900HX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4, DDR5 | DDR4, DDR5 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 76.8 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz) | Intel UHD Graphics for 12th Gen Intel Processors |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.55 GHz |
| Execution Units | no data | 32 |
Graphics interfaces
Available interfaces and connections of Core i7-1255U and Core i9-12900HX integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Core i7-1255U and Core i9-12900HX integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz |
| Max resolution over eDP | no data | 5120 x 3200 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Core i7-1255U and Core i9-12900HX integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.1 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Core i7-1255U and Core i9-12900HX.
| PCIe version | 4.0 | 5.0 and 4.0 |
| PCI Express lanes | 20 | 20 |
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. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
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.
Geekbench 5.5 Multi-Core
Blender(-)
Geekbench 5.5 Single-Core
7-Zip Single
7-Zip
WebXPRT 3
CrossMark Overall
WebXPRT 4 Overall
Blender v3.3 Classroom CPU(-)
Pros & cons summary
| Performance score | 8.53 | 21.24 |
| Integrated graphics card | 9.47 | 5.58 |
| Recency | 23 February 2022 | 10 May 2022 |
| Physical cores | 10 | 16 |
| Threads | 12 | 24 |
| Power consumption (TDP) | 15 Watt | 55 Watt |
i7-1255U has 69.7% faster integrated GPU, and 266.7% lower power consumption.
i9-12900HX, on the other hand, has a 149% higher aggregate performance score, an age advantage of 2 months, and 60% more physical cores and 100% more threads.
The Core i9-12900HX is our recommended choice as it beats the Core i7-1255U in performance tests.
Should you still have questions on choice between Core i7-1255U and Core i9-12900HX, ask them in Comments section, and we shall answer.
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