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Intel Core i7-1255U vs Intel Core i7-12800H: Comparison
Intel Core i7-1255U and Intel Core i7-12800H separate most on l3 cache: Intel Core i7-1255U at 12 MB, Intel Core i7-12800H at 24 MB, 50% in favour of Intel Core i7-12800H. PCIe Lanes splits them by another 50%, again favouring Intel Core i7-12800H. They match on 17 other specifications, including product line, form factor and codename.
Specs
| Specification |  | |
|---|---|---|
| Product Line | Core | Core |
| Form Factor | Laptop | Laptop |
| Model Number | i7-1255U | i7-12800H |
| Codename | Alder Lake | Alder Lake |
| Release Year | 2022 | 2022 |
| TDP | 15 W | 45 W |
| iGPU | Intel Iris Xe Graphics (reduced EU) | Intel Iris Xe Graphics |
| Market Segment | Laptop | Laptop |
| Socket | BGA 1744 (BGA, soldered) | BGA |
| Process Node | 10 nm | 10 nm |
| Performance Cores | 2 | 6 |
| Efficiency Cores | 8 | 8 |
| SMT Enabled | true | true |
| P-Core Base Clock | 1.7 | 2.4 |
| P-Core Boost Clock | 4.7 | 4.8 |
| E-Core Base Clock | 1.2 | 1.8 |
| E-Core Boost Clock | 3.5 | 3.7 |
| L3 Cache | 12 MB-50% | 24 MB |
| Base Power | 15 W | 45 W |
| Max Turbo Power | 55 | 115 |
| Configurable TDP Floor | 9 | 35 |
| Memory Type | DDR5 or DDR4 | DDR5 or DDR4 |
| Max Memory Speed | 4800 | 4800 |
| Memory Channels | 2 | 2 |
| Max Memory Capacity | 64 | 64 |
| Integrated Graphics | Yes | Yes |
| iGPU Model | Intel Iris Xe Graphics | Intel Iris Xe Graphics |
| iGPU Compute Units | 96 | 96 |
| PCIe Generation | PCIe 4.0 | PCIe 4.0 |
| PCIe Lanes | 10-50% | 20 |
| Cores | 10 | 14 |
| Threads | 12 | 20 |
| Architecture | Alder Lake | Alder Lake |
Verdict
Intel Core i7-1255U
7.7 / 10 Expert Rating
The Intel Core i7-1255U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs.
Intel Core i7-12800H
8.3 / 10 Expert Rating
The Intel Core i7-12800H is a well-rounded performance mobile chip, suited to premium laptops balancing power and portability.