Core i7-1255U: specs and benchmarks
Aggregate performance score
Core i7-1255U provides acceptable benchmark performance at 8.54% of a leader's which is a 96-core EPYC 9655P.
Summary
Intel started Core i7-1255U sales 23 February 2022. This is an Alder Lake-U architecture notebook processor primarily aimed at office systems. It has 10 cores and 12 threads, and is based on Intel 7 manufacturing technology, with a maximum frequency of 4700 MHz and a locked multiplier.
Compatibility-wise, this is FCBGA1744 processor with a TDP of 15 Watt. It supports DDR4, DDR5 memory.
Primary details
Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in the ranking | 882 | |
| Place by popularity | 37 | |
| Market segment | Laptop | |
| Series | Intel Alder Lake-M | |
| Power efficiency | 53.88 | of 100.00 (Core Ultra 7 164U) |
| Architecture codename | Alder Lake-U (2022) | |
| Release date | 23 February 2022 (2 years ago) |
Detailed specifications
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
| Physical cores | 10 (Deca-Core) | |
| Threads | 12 | |
| Base clock speed | 1.7 GHz | of 4.7 GHz (Ryzen 9 7900X) |
| Boost clock speed | 4.7 GHz | of 6.2 GHz (Core i9-14900KS) |
| L1 cache | 80K (per core) | of 80 KB (EPYC 9965) |
| L2 cache | 1.25 MB (per core) | of 2 MB (Xeon 6980P) |
| L3 cache | 12 MB (shared) | of 1152 MB (EPYC 9684X) |
| Chip lithography | Intel 7 nm | of 3 nm (Core Ultra 9 285K) |
| Maximum core temperature | 100 °C | of 110 °C (Core Ultra 9 185H) |
| 64 bit support | + | |
| Windows 11 compatibility | + |
Compatibility
Information on Core i7-1255U compatibility with other computer components and devices: 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 | of 8 (Xeon Platinum 8454H) |
| Socket | FCBGA1744 | |
| Power consumption (TDP) | 15 Watt | of 3100 ‑ 4500 (Ryzen 7 7435H) |
Technologies and extensions
Technological capabilities and additional instructions supported by Core i7-1255U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | |
| AES-NI | + | |
| FMA | + | |
| AVX | + | |
| Enhanced SpeedStep (EIST) | + | |
| Speed Shift | + | |
| Hyper-Threading Technology | + | |
| TSX | + | |
| Thermal Monitoring | + | |
| Flex Memory Access | + | |
| Deep Learning Boost | + |
Security technologies
Processor technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | |
| EDB | + | |
| Secure Key | + | |
| OS Guard | + |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| VT-d | + | |
| VT-x | + | |
| EPT | + |
Memory specs
Types, maximum amount and channel number of RAM supported by Core i7-1255U's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR4, DDR5 | |
| Maximum memory size | 64 GB | of 6 TiB (EPYC 9654) |
| Max memory channels | 2 | of 12 (Xeon Platinum 9221) |
Graphics specifications
General parameters of a GPU integrated into Core i7-1255U.
| Integrated graphics card | Intel® Iris® Xe Graphics eligible | |
| Quick Sync Video | + | |
| Graphics max frequency | 1.25 GHz | |
| Execution Units | 96 |
Graphics interfaces
Available interfaces and connections of Core i7-1255U's integrated GPU.
| Number of displays supported | 4 |
Graphics image quality
Maximum display resolutions supported by Core i7-1255U's integrated GPU, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | 4096 x 2304 @ 60Hz | |
| Max resolution over eDP | 4096 x 2304 @ 120Hz | |
| Max resolution over DisplayPort | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Core i7-1255U's integrated GPU, sometimes API versions are included.
| DirectX | 12.1 | |
| OpenGL | 4.6 |
Peripherals
Specifications and connection types of supported peripherals.
| PCIe version | 4.0 | of 5.0 (EPYC 9655P) |
| PCI Express lanes | 20 | of 128 (EPYC 9655P) |
Benchmark performance
Single-core and multi-core benchmark results of Core i7-1255U. Overall benchmark performance 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
Send your test results of Core i7-1255U.
AMD equivalent
According to our data, the closest AMD alternative to Core i7-1255U is Ryzen 5 4600U, which is slower by 1% and lower by 6 positions in our ranking.
Here are some closest AMD rivals to Core i7-1255U:
Similar processors
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
Recommended GPUs
People consider these graphics cards to be good for Core i7-1255U, according to our PC configuration statistics.
These are the fastest graphics cards for Core i7-1255U in our user configuration statistics. There is a total of 14991 configurations using Core i7-1255U in our database.
