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Intel Core i7-1255U vs Intel Core i7-1355U: Comparison
Core i7-1255U vs Core i7-1355U p-core boost clock compared
P-core boost clock is the dividing line, Core i7-1255U 4.7 GHz against Core i7-1355U 5.0 GHz. The benchmark result agrees. Cinebench R23 (Multi-Core) puts Core i7-1355U 15% ahead, 9,122 against 7,758. There is a split on socket as well, FCBGA1744 on the Core i7-1255U versus BGA 1744 on the Core i7-1355U. Release year is not the same on both, 2022 on the Core i7-1255U versus 2023 on the Core i7-1355U. They differ on microarchitecture too, Alder Lake on the Core i7-1255U versus Raptor Lake on the Core i7-1355U. Memory type is not the same on both, DDR5, DDR4, LPDDR5, LPDDR4x on the Core i7-1255U versus DDR5, DDR4, LPDDR5/x, LPDDR4x on the Core i7-1355U.
Core i7-1255U vs Core i7-1355U: which one fits your build
Buy the Core i7-1255U for ultra-thin laptops and business laptops, though it is not built for gaming laptops and heavy sustained workloads. The Core i7-1355U is the one to take for ultra-thin laptops and business laptops, though it is not the pick for gaming laptops and heavy sustained workloads. Our rating of the Core i7-1255U (7.7/10): the Intel Core i7-1255U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs. Our rating of the Core i7-1355U (7.7/10): the Intel Core i7-1355U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs.
Where the two are identical
The common ground is wider than the gap: total cores, performance cores, efficiency cores, total threads and p-core base clock are identical here. They match on 9 further specifications as well.
Frequently asked questions
Is the TDP the same on the Core i7-1255U and Core i7-1355U?
It is. Both are listed at 15 W, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- Intel Core i7-1255U
- Laptop
- Intel Core i7-1355U
- Laptop
Codename
- Intel Core i7-1255U
- Alder Lake
- Intel Core i7-1355U
- Raptor Lake
Release Year
- Intel Core i7-1255U
- 2022
- Intel Core i7-1355U
- 2023
TDP
- Intel Core i7-1255U
- 15 W
- Intel Core i7-1355U
- 15 W
iGPU
- Intel Core i7-1255U
- Intel Iris Xe Graphics
- Intel Core i7-1355U
- Intel Iris Xe Graphics
Market Segment
- Intel Core i7-1255U
- Laptop
- Intel Core i7-1355U
- Laptop
Microarchitecture
- Intel Core i7-1255U
- Alder Lake
- Intel Core i7-1355U
- Raptor Lake
Socket
- Intel Core i7-1255U
- FCBGA1744
- Intel Core i7-1355U
- BGA 1744 (BGA, soldered)
Process Node
- Intel Core i7-1255U
- 7 nm
- Intel Core i7-1355U
- 7 nm
Total Cores
- Intel Core i7-1255U
- 10
- Intel Core i7-1355U
- 10
Performance Cores
- Intel Core i7-1255U
- 2
- Intel Core i7-1355U
- 2
Efficiency Cores
- Intel Core i7-1255U
- 8
- Intel Core i7-1355U
- 8
Total Threads
- Intel Core i7-1255U
- 12
- Intel Core i7-1355U
- 12
SMT Enabled
- Intel Core i7-1255U
- Yes
- Intel Core i7-1355U
- Yes
P-Core Base Clock
- Intel Core i7-1255U
- 1.7 GHz
- Intel Core i7-1355U
- 1.7 GHz
P-Core Boost Clock
- Intel Core i7-1255U
- 4.7 GHz
- Intel Core i7-1355U
- 5.0 GHz
L3 Cache
- Intel Core i7-1255U
- 12 MB
- Intel Core i7-1355U
- 12 MB
Base Power
- Intel Core i7-1255U
- 15 W
- Intel Core i7-1355U
- 15 W
Max Turbo Power
- Intel Core i7-1255U
- 55 W
- Intel Core i7-1355U
- 55 W
Memory Type
- Intel Core i7-1255U
- DDR5, DDR4, LPDDR5, LPDDR4x
- Intel Core i7-1355U
- DDR5, DDR4, LPDDR5/x, LPDDR4x
Integrated Graphics
- Intel Core i7-1255U
- Yes
- Intel Core i7-1355U
- Yes
Benchmarks
- General CPU
Cinebench R23 (Multi-Core)
- Intel Core i7-1255U
- 7,758-15%
- Intel Core i7-1355U
- 9,122Best
Renders a 3D scene on every core. Shows speed in rendering and other heavy work.
Which one should you pick?
Choose 1255U if you want the higher L3 cache (12 MB vs 12 MB).
Choose 1355U if you want the higher cinebench R23 (Multi-Core) (9,122 vs 7,758).
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 i7-1355U
7.7 / 10 Expert Rating
The Intel Core i7-1355U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs.