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Intel Core i7-1250U vs Intel Core i7-1255U: Comparison
What is the difference between Core i7-1250U and Core i7-1255U?
The first real difference is e-core boost clock: Core i7-1250U 3.3 GHz against Core i7-1255U 3.5 GHz. There is a split on base power as well, 9 W on the Core i7-1250U versus 15 W on the Core i7-1255U. There is a split on max turbo power as well, 29 W on the Core i7-1250U versus 55 W on the Core i7-1255U. Memory type is not the same on both, LPDDR5, LPDDR4x on the Core i7-1250U versus DDR5, DDR4, LPDDR5, LPDDR4x on the Core i7-1255U. They differ on ecc support too, Yes on the Core i7-1250U versus No on the Core i7-1255U.
Core i7-1250U vs Core i7-1255U: which one fits your build
The Core i7-1250U is the one to take for ultra-thin laptops and business laptops, though it is the wrong buy for gaming laptops and heavy sustained workloads. The Core i7-1255U suits ultra-thin laptops and business laptops, though it is not built for gaming laptops and heavy sustained workloads. Our rating of the Core i7-1250U (7.7/10): the Intel Core i7-1250U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs. 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.
Where the two are identical
Everything else lines up. Total cores, performance cores, efficiency cores, total threads and p-core boost clock read the same on both, so those are not worth weighing. They match on 18 further specifications as well.
Frequently asked questions
Do the Core i7-1250U and Core i7-1255U differ on p-core base clock?
Yes. P-Core Base Clock reads 1.1 GHz on the Core i7-1250U versus 1.7 GHz on the Core i7-1255U.
Is the Configurable TDP Floor the same on the Core i7-1250U and Core i7-1255U?
It is. Both are listed at 9 W, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- Intel Core i7-1250U
- Intel
- Intel Core i7-1255U
- Intel
Product Line
- Intel Core i7-1250U
- Core
- Intel Core i7-1255U
- Core
Form Factor
- Intel Core i7-1250U
- Laptop
- Intel Core i7-1255U
- Laptop
Model Number
- Intel Core i7-1250U
- i7-1250U
- Intel Core i7-1255U
- i7-1255U
Codename
- Intel Core i7-1250U
- Alder Lake
- Intel Core i7-1255U
- Alder Lake
Release Year
- Intel Core i7-1250U
- 2022
- Intel Core i7-1255U
- 2022
TDP
- Intel Core i7-1250U
- 9 W
- Intel Core i7-1255U
- 15 W
iGPU
- Intel Core i7-1250U
- Intel Iris Xe Graphics
- Intel Core i7-1255U
- Intel Iris Xe Graphics
Market Segment
- Intel Core i7-1250U
- Laptop
- Intel Core i7-1255U
- Laptop
Microarchitecture
- Intel Core i7-1250U
- Alder Lake
- Intel Core i7-1255U
- Alder Lake
Socket
- Intel Core i7-1250U
- FCBGA1781
- Intel Core i7-1255U
- FCBGA1744
Socket Status
- Intel Core i7-1250U
- Mature
- Intel Core i7-1255U
- Mature
Process Node
- Intel Core i7-1250U
- 7 nm
- Intel Core i7-1255U
- 7 nm
Total Cores
- Intel Core i7-1250U
- 10
- Intel Core i7-1255U
- 10
Performance Cores
- Intel Core i7-1250U
- 2
- Intel Core i7-1255U
- 2
Efficiency Cores
- Intel Core i7-1250U
- 8
- Intel Core i7-1255U
- 8
Total Threads
- Intel Core i7-1250U
- 12
- Intel Core i7-1255U
- 12
SMT Enabled
- Intel Core i7-1250U
- Yes
- Intel Core i7-1255U
- Yes
P-Core Base Clock
- Intel Core i7-1250U
- 1.1 GHz
- Intel Core i7-1255U
- 1.7 GHz
P-Core Boost Clock
- Intel Core i7-1250U
- 4.7 GHz
- Intel Core i7-1255U
- 4.7 GHz
E-Core Base Clock
- Intel Core i7-1250U
- 0.8 GHz
- Intel Core i7-1255U
- 1.2 GHz
E-Core Boost Clock
- Intel Core i7-1250U
- 3.3 GHz
- Intel Core i7-1255U
- 3.5 GHz
L3 Cache
- Intel Core i7-1250U
- 12 MB
- Intel Core i7-1255U
- 12 MB
Base Power
- Intel Core i7-1250U
- 9 W
- Intel Core i7-1255U
- 15 W
Max Turbo Power
- Intel Core i7-1250U
- 29 W
- Intel Core i7-1255U
- 55 W
Configurable TDP Floor
- Intel Core i7-1250U
- 9 W
- Intel Core i7-1255U
- 9 W
Memory Type
- Intel Core i7-1250U
- LPDDR5, LPDDR4x
- Intel Core i7-1255U
- DDR5, DDR4, LPDDR5, LPDDR4x
Max Memory Speed
- Intel Core i7-1250U
- 4800 MT/s
- Intel Core i7-1255U
- 4800 MT/s
Memory Channels
- Intel Core i7-1250U
- 2
- Intel Core i7-1255U
- 2
Max Memory Capacity
- Intel Core i7-1250U
- 64 GB
- Intel Core i7-1255U
- 64 GB
ECC Support
- Intel Core i7-1250U
- Yes
- Intel Core i7-1255U
- No
Integrated Graphics
- Intel Core i7-1250U
- Yes
- Intel Core i7-1255U
- Yes
iGPU Model
- Intel Core i7-1250U
- Intel Iris Xe Graphics
- Intel Core i7-1255U
- Intel Iris Xe Graphics
iGPU Compute Units
- Intel Core i7-1250U
- 64
- Intel Core i7-1255U
- 96
PCIe Generation
- Intel Core i7-1250U
- PCIe 4.0
- Intel Core i7-1255U
- PCIe 4.0
PCIe Lanes
- Intel Core i7-1250U
- 10
- Intel Core i7-1255U
- 10
Retail Availability
- Intel Core i7-1250U
- Soldered Only
- Intel Core i7-1255U
- Soldered Only
Which one should you pick?
Choose 1250U if you want the higher L3 cache (12 MB vs 12 MB), the higher memory channels (2 vs 2) and the higher PCIe lanes (10 vs 10).
Choose 1255U if you already have it on hand or find it at a lower price.
Verdict
Intel Core i7-1250U
7.7 / 10 Expert Rating
The Intel Core i7-1250U prioritizes battery life and portability, fitting thin business and everyday laptops rather than performance-first designs.
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.