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Intel Core Ultra 5 245HX vs Intel Core Ultra 7 251HX: Comparison
What is the difference between Core Ultra 5 245HX and Core Ultra 7 251HX?
These two are close on paper, and total cores is the only measure that separates them at all: Core Ultra 5 245HX 14 against Core Ultra 7 251HX 18. Core Ultra 7 251HX also leads on l3 cache, 24 MB on the Core Ultra 5 245HX versus 30 MB on the Core Ultra 7 251HX.
Core Ultra 5 245HX vs Core Ultra 7 251HX: which one fits your build
The Core Ultra 5 245HX suits high-end gaming laptops and mobile content creation, though it is not built for thin-and-light laptops and battery-life-focused use. Buy the Core Ultra 7 251HX for gaming laptops with a dedicated graphics card and streaming, photo editing and moderate video work, though it is not the pick for thin and light laptops where battery life comes first and copilot+ PC AI features, which need a 40+ TOPS NPU. It is equally the pick for buyers who want HX-class speed without paying for a Core Ultra 9. It is not the one for hours of heavy rendering, where chips with more performance cores finish sooner. Our rating of the Core Ultra 5 245HX (8.8/10): the Intel Core Ultra 5 245HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP.
Where the two are identical
The common ground is wider than the gap: performance cores, p-core boost clock, tdp, integrated graphics and socket are identical here. They match on 6 further specifications as well.
Do the Core Ultra 5 245HX and Core Ultra 7 251HX differ on efficiency cores?
Yes. Efficiency Cores reads 8 on the Core Ultra 5 245HX versus 12 on the Core Ultra 7 251HX.
Is the Form Factor the same on the Core Ultra 5 245HX and Core Ultra 7 251HX?
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 5 245HX
- Laptop
- Intel Core Ultra 7 251HX
- Laptop
Codename
- Intel Core Ultra 5 245HX
- Arrow Lake
- Intel Core Ultra 7 251HX
- Arrow Lake
Release Year
- Intel Core Ultra 5 245HX
- 2025
- Intel Core Ultra 7 251HX
- 2026
TDP
- Intel Core Ultra 5 245HX
- 55 W
- Intel Core Ultra 7 251HX
- 55 W
iGPU
- Intel Core Ultra 5 245HX
- Intel Graphics
- Intel Core Ultra 7 251HX
- Intel Graphics
Market Segment
- Intel Core Ultra 5 245HX
- Laptop
- Intel Core Ultra 7 251HX
- Laptop
Microarchitecture
- Intel Core Ultra 5 245HX
- Arrow Lake-HX
- Intel Core Ultra 7 251HX
- Arrow Lake
Socket
- Intel Core Ultra 5 245HX
- FCBGA2114
- Intel Core Ultra 7 251HX
- FCBGA2114
Process Node
- Intel Core Ultra 5 245HX
- 3 nm
- Intel Core Ultra 7 251HX
- 3 nm
Total Cores
- Intel Core Ultra 5 245HX
- 14
- Intel Core Ultra 7 251HX
- 18Best
Performance Cores
- Intel Core Ultra 5 245HX
- 6
- Intel Core Ultra 7 251HX
- 6
Efficiency Cores
- Intel Core Ultra 5 245HX
- 8
- Intel Core Ultra 7 251HX
- 12Best
Total Threads
- Intel Core Ultra 5 245HX
- 14
- Intel Core Ultra 7 251HX
- 18Best
SMT Enabled
- Intel Core Ultra 5 245HX
- No
- Intel Core Ultra 7 251HX
- No
P-Core Base Clock
- Intel Core Ultra 5 245HX
- 3.1 GHz
- Intel Core Ultra 7 251HX
- 2.9 GHz
P-Core Boost Clock
- Intel Core Ultra 5 245HX
- 5.1 GHz
- Intel Core Ultra 7 251HX
- 5.1 GHz
L3 Cache
- Intel Core Ultra 5 245HX
- 24 MB-20%
- Intel Core Ultra 7 251HX
- 30 MBBest
Base Power
- Intel Core Ultra 5 245HX
- 55 W
- Intel Core Ultra 7 251HX
- 55 W
Max Turbo Power
- Intel Core Ultra 5 245HX
- 160 W
- Intel Core Ultra 7 251HX
- 160 W
Memory Type
- Intel Core Ultra 5 245HX
- DDR5
- Intel Core Ultra 7 251HX
- DDR5 up to 6400 MT/s
Integrated Graphics
- Intel Core Ultra 5 245HX
- Yes
- Intel Core Ultra 7 251HX
- Yes
NPU Peak TOPS
- Intel Core Ultra 5 245HX
- 13 TOPS (NPU 3)
- Intel Core Ultra 7 251HX
- 13 TOPS (Intel AI Boost)
Which one should you pick?
Choose 245HX if you already have it on hand or find it at a lower price.
Choose 251HX if you want the higher L3 cache (30 MB vs 24 MB).
Verdict
Intel Core Ultra 5 245HX
8.8 / 10 Expert Rating
The Intel Core Ultra 5 245HX brings desktop-class core counts to a mobile package, suited to high-end gaming and creator laptops that can handle the higher TDP.