i7-8665UE vs i7-1255U
Aggregate performance score
Core i7-1255U outperforms Core i7-8665UE by a whopping 162% based on our aggregate benchmark results.
Primary details
Comparing Core i7-1255U and Core i7-8665UE processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 903 | 1617 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Alder Lake-M | no data |
| Power efficiency | 53.85 | 20.53 |
| Architecture codename | Alder Lake-U (2022) | Whiskey Lake-U (2018−2019) |
| Release date | 23 February 2022 (2 years ago) | 1 October 2018 (6 years ago) |
| Launch price (MSRP) | no data | $409 |
Detailed specifications
Core i7-1255U and Core i7-8665UE 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) | 4 (Quad-Core) |
| Threads | 12 | 8 |
| Base clock speed | 1.7 GHz | 1.7 GHz |
| Boost clock speed | 4.7 GHz | 4.4 GHz |
| L1 cache | 80K (per core) | 64 KB (per core) |
| L2 cache | 1.25 MB (per core) | 256 KB (per core) |
| L3 cache | 12 MB (shared) | 8 MB (shared) |
| Chip lithography | 10 nm | 14 nm |
| Maximum core temperature | 100 °C | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
Compatibility
Information on Core i7-1255U and Core i7-8665UE 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 | Intel BGA 1528 |
| Power consumption (TDP) | 15 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-1255U and Core i7-8665UE. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| TSX | + | + |
Security technologies
Core i7-1255U and Core i7-8665UE technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-1255U and Core i7-8665UE are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-1255U and Core i7-8665UE. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4, DDR5 | DDR3, DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel Iris Xe Graphics G7 96EUs ( - 1250 MHz) | Intel UHD Graphics 620 |
Peripherals
Specifications and connection of peripherals supported by Core i7-1255U and Core i7-8665UE.
| PCIe version | 4.0 | 3.0 |
| PCI Express lanes | 20 | 16 |
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.
Pros & cons summary
| Performance score | 8.47 | 3.23 |
| Integrated graphics card | 9.24 | 2.68 |
| Recency | 23 February 2022 | 1 October 2018 |
| Physical cores | 10 | 4 |
| Threads | 12 | 8 |
| Chip lithography | 10 nm | 14 nm |
i7-1255U has a 162.2% higher aggregate performance score, 244.8% faster integrated GPU, an age advantage of 3 years, 150% more physical cores and 50% more threads, and a 40% more advanced lithography process.
The Core i7-1255U is our recommended choice as it beats the Core i7-8665UE in performance tests.
Should you still have questions on choice between Core i7-1255U and Core i7-8665UE, ask them in Comments section, and we shall answer.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
