ZoomPhoto 1 of 1Intel
Intel Core Ultra 7 255HX
The Intel Core Ultra 7 255HX is an Arrow Lake-HX laptop processor with 8 Performance cores and 12 Efficient cores (20 cores, 20 threads) and a 5.2 GHz maximum turbo. Built on TSMC N3B, it has 4-Xe-core integrated graphics at up to 1.85 GHz, a 13 TOPS NPU and DDR5-6400 support up to 256 GB. Intel rates it at 55 W base and 160 W maximum turbo power.
Pros
- 20 cores (8 Performance and 12 Efficient) deliver about 17,915 Geekbench 6 multi-core points in review testing
- Up to 5.2 GHz Performance-core turbo, with about 2,959 Geekbench 6 single-core points in review testing
- 30 MB Intel Smart Cache and DDR5-6400 support up to 256 GB
- PCIe 5.0 and 4.0 support with up to 24 lanes from the processor
- 13 TOPS Intel AI Boost NPU
Cons
- No Hyper-Threading, so 20 cores give only 20 threads
- Up to 160 W maximum turbo power calls for capable cooling
- 13 TOPS NPU is below the 40 TOPS Microsoft requires for Copilot+ PCs
- Integrated graphics are limited to 4 Xe-cores at up to 1.85 GHz, so gaming laptops add a discrete GPU
Good
Computed from specs & benchmarks via our public methodology.
Full specifications
Everything we track for the Intel Core Ultra 7 255HX
General
- Announced
- 2025
- Process
- 3 nm
- Base TDP
- 55 W
- Max TDP
- 160 W
Cores & Clocks
- Cores
- 20
- Performance cores
- 8
- Efficiency cores
- 12
- Threads
- 20
- Base clock
- 2.4 GHz
- Boost clock
- 5.2 GHz
- L3 cache
- 30 MB
Integrated GPU
- iGPU
- Intel Graphics (4 Xe-cores)
- iGPU clock
- 1,850 MHz
Memory
- Memory support
- DDR5-6400
- Max memory
- 256 GB
Benchmarks
- Geekbench 6 (single)
- 2,959Top 17%
- Geekbench 6 (multi)
- 17,915Top 12%
- Cinebench R23 (single)
- 2,154Top 10%
- Cinebench R23 (multi)
- 31,781Top 6%
- PassMark
- 47,933Top 8%
Devices with the Intel Core Ultra 7 255HX
1 device in our catalog uses this chip
Quick answers
Is the Intel Core Ultra 7 255HX good in 2026?
The Intel Core Ultra 7 255HX earns an Inno Score of 67.9/100 (“Good”) based on its specs and benchmark results. The Intel Core Ultra 7 255HX is an Arrow Lake-HX laptop processor with 8 Performance cores and 12 Efficient cores (20 cores, 20 threads) and a 5.2 GHz maximum turbo. Built on TSMC N3B, it has 4-Xe-core integrated graphics at up to 1.85 GHz, a 13 TOPS NPU and DDR5-6400 support up to 256 GB. Intel rates it at 55 W base and 160 W maximum turbo power.
Does the Intel Core Ultra 7 255HX count as "Core i7 or equivalent"?
Its PassMark CPU Mark average is 47,933 (cpubenchmark.net, retrieved Sep 26, 2026), which puts it in Tier A of our CPU tier checker: current Core i7 H / Core Ultra 7 / Ryzen 7 class and above. Requirement pages word this differently, so check the exact wording with your department.
Which devices use the Intel Core Ultra 7 255HX?
One device in our catalog uses the Intel Core Ultra 7 255HX: Lenovo Legion 7i Gen 10 (16IAX10).
What are the key specs of the Intel Core Ultra 7 255HX?
Cores: 20 · Threads: 20 · Boost clock: 5.2 GHz · Base TDP: 55 W
What are the closest alternatives to the Intel Core Ultra 7 255HX?
Its closest rivals on InnoReviews are AMD Ryzen AI 9 HX 470, Intel Core Ultra 7 356H, Intel Core Ultra X7 358H — open the comparison pages for a spec-by-spec breakdown.
