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Intel Core Ultra 7 255HX vs Intel Core Ultra 9 275HX: Comparison
Core Ultra 7 255HX vs Core Ultra 9 275HX total cores compared
There is no decisive spec gap here. Total cores splits them by a margin most buyers will never feel, Core Ultra 7 255HX 20 against Core Ultra 9 275HX 24. L3 cache runs the same way, 30 MB on the Core Ultra 7 255HX versus 36 MB on the Core Ultra 9 275HX, another win for Core Ultra 9 275HX. They differ on socket too, BGA 2114 on the Core Ultra 7 255HX versus FCBGA2114 on the Core Ultra 9 275HX.
Core Ultra 7 255HX vs Core Ultra 9 275HX: which one fits your build
Buy the Core Ultra 7 255HX for high-end gaming laptops and mobile content creation, though it is the wrong buy for thin-and-light laptops and battery-life-focused use. The Core Ultra 9 275HX suits high-end gaming laptops and mobile content creation, though it is not the pick for thin-and-light laptops and battery-life-focused use. Our rating of the Core Ultra 7 255HX (8.8/10): the Intel Core Ultra 7 255HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP. Our rating of the Core Ultra 9 275HX (8.8/10): the Intel Core Ultra 9 275HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP.
What Core Ultra 7 255HX and Core Ultra 9 275HX have in common
Everything else lines up. Performance cores, tdp, integrated graphics, form factor and release year read the same on both, so those are not worth weighing. They match on 7 further specifications as well.
Frequently asked questions
Do the Core Ultra 7 255HX and Core Ultra 9 275HX differ on efficiency cores?
Yes. Efficiency Cores reads 12 on the Core Ultra 7 255HX versus 16 on the Core Ultra 9 275HX.
Is the Market Segment the same on the Core Ultra 7 255HX and Core Ultra 9 275HX?
It is. Both are listed at Laptop, so it is not a reason to pick one over the other.
Specs and benchmarks
Form Factor
- Intel Core Ultra 7 255HX
- Laptop
- Intel Core Ultra 9 275HX
- Laptop
Codename
- Intel Core Ultra 7 255HX
- Arrow Lake
- Intel Core Ultra 9 275HX
- Arrow Lake
Release Year
- Intel Core Ultra 7 255HX
- 2025
- Intel Core Ultra 9 275HX
- 2025
TDP
- Intel Core Ultra 7 255HX
- 55 W
- Intel Core Ultra 9 275HX
- 55 W
iGPU
- Intel Core Ultra 7 255HX
- Intel Graphics (Xe-LPG, reduced EU count)
- Intel Core Ultra 9 275HX
- Intel Graphics
Market Segment
- Intel Core Ultra 7 255HX
- Laptop
- Intel Core Ultra 9 275HX
- Laptop
Microarchitecture
- Intel Core Ultra 7 255HX
- Arrow Lake-HX
- Intel Core Ultra 9 275HX
- Arrow Lake-HX
Socket
- Intel Core Ultra 7 255HX
- BGA 2114 (BGA, soldered)
- Intel Core Ultra 9 275HX
- FCBGA2114
Process Node
- Intel Core Ultra 7 255HX
- 3 nm
- Intel Core Ultra 9 275HX
- 3 nm
Total Cores
- Intel Core Ultra 7 255HX
- 20
- Intel Core Ultra 9 275HX
- 24Best
Performance Cores
- Intel Core Ultra 7 255HX
- 8
- Intel Core Ultra 9 275HX
- 8
Efficiency Cores
- Intel Core Ultra 7 255HX
- 12
- Intel Core Ultra 9 275HX
- 16Best
Total Threads
- Intel Core Ultra 7 255HX
- 20
- Intel Core Ultra 9 275HX
- 24Best
SMT Enabled
- Intel Core Ultra 7 255HX
- No
- Intel Core Ultra 9 275HX
- No
P-Core Base Clock
- Intel Core Ultra 7 255HX
- 2.4 GHz
- Intel Core Ultra 9 275HX
- 2.7 GHz
P-Core Boost Clock
- Intel Core Ultra 7 255HX
- 5.2 GHz
- Intel Core Ultra 9 275HX
- 5.4 GHz
L3 Cache
- Intel Core Ultra 7 255HX
- 30 MB-17%
- Intel Core Ultra 9 275HX
- 36 MBBest
Base Power
- Intel Core Ultra 7 255HX
- 55 W
- Intel Core Ultra 9 275HX
- 55 W
Max Turbo Power
- Intel Core Ultra 7 255HX
- 160 W
- Intel Core Ultra 9 275HX
- 160 W
Memory Type
- Intel Core Ultra 7 255HX
- DDR5
- Intel Core Ultra 9 275HX
- DDR5
Integrated Graphics
- Intel Core Ultra 7 255HX
- Yes
- Intel Core Ultra 9 275HX
- Yes
NPU Peak TOPS
- Intel Core Ultra 7 255HX
- 13 TOPS (NPU 3)
- Intel Core Ultra 9 275HX
- 13 TOPS (NPU 3)
Which one should you pick?
Choose 255HX if you already have it on hand or find it at a lower price.
Choose 275HX if you want the higher L3 cache (36 MB vs 30 MB).
Verdict
Intel Core Ultra 7 255HX
8.8 / 10 Expert Rating
The Intel Core Ultra 7 255HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP.
Intel Core Ultra 9 275HX
8.8 / 10 Expert Rating
The Intel Core Ultra 9 275HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP.
More comparisons in Processors (CPUs)
- Intel Core Ultra 7 265HX vs Intel Core Ultra 9 275HX
- Intel Core Ultra 7 255HX vs Intel Core Ultra 7 265HX
- Intel Core Ultra 7 165H vs Intel Core Ultra 7 255HX
- Intel Core Ultra 7 255HX vs Intel Core Ultra 9 285H
- Intel Core Ultra 7 255HX vs Intel Core Ultra 7 266V
- Intel Core Ultra 7 255HX vs Intel Core Ultra 7 268V