Intel Core Ultra 7 255HX vs Ultra 7 155H
75
out of 100
VS
57
out of 100
We compared two laptop CPUs: the 2.4 GHz Intel Core Ultra 7 255HX with 20-cores against the 1.4 GHz Ultra 7 155H with 16-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.
Review
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
Integrated Graphics
iGPU capabilities for gaming and 3D-intensive tasks
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
Key Differences
Advantages of Intel Core Ultra 7 255HX
- Supports up to 256 GB DDR5-6400 RAM
- More modern manufacturing process β 3 versus 7 nanometers
- Unlocked multiplier
- Newer - released 1 year and 1 month later
- Has 4 more physical cores
- Has 6 MB larger L3 cache size, helping fully utilize a high-end GPU in gaming
- 19% faster in a single-core Geekbench v6 test - 2888 vs 2421 points
- 8% higher Turbo Boost frequency (5.2 GHz vs 4.8 GHz)
- Around 12.8 GB/s (14%) higher theoretical memory bandwidth
Advantages of Intel Core Ultra 7 155H
- More powerful Arc Graphics (8-Cores) integrated graphics: 4.6 vs 1.9 TFLOPS
Test in Benchmarks
Comparing the performance of CPUs across various tasksCinebench
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
| Cinebench 2026 (Single) | - | 544 |
| Cinebench 2026 (Multi) | - | 3749 |
Cinebench Scores (47th and 163rd place)
GeekBench v6
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
| File compression | 1140 MB/sec | 1220 MB/sec |
| Clang compilation | 149.8 Klines/sec | 100.8 Klines/sec |
| HTML 5 Browser | 312.2 pages/sec | 270.5 pages/sec |
| PDF Renderer | 423.9 Mpixels/sec | 356.1 Mpixels/sec |
| Text processing | 335.6 pages/sec | 243.4 pages/sec |
| Background blur | 64.1 images/sec | 49.2 images/sec |
| Photo processing | 111.8 images/sec | 117.2 images/sec |
| Ray tracing | 31.1 Mpixels/sec | 19.4 Mpixels/sec |
PassMark
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
| Integer math | 127 GOps/sec | 85.8 GOps/sec |
| Floating point math | 160.3 GOps/sec | 62.5 GOps/sec |
| Find prime numbers | 400M Primes/sec | 113M Primes/sec |
| Random string sorting | 62.4M Strings/sec | 31.6M Strings/sec |
| Data encryption | 39.4 GBytes/sec | 16.1 GBytes/sec |
| Data compression | 513.6 MBytes/sec | 273.8 MBytes/sec |
| Physics | 2916 Frames/sec | 1701 Frames/sec |
| Extended instructions | 41.1B Matrices/sec | 16.2B Matrices/sec |
Blender
Blender CPU
Performance Per Watt
| Cinebench 2024 / Watt | 32 PPW | 14.7 PPW |
| Geekbench 6 Multi / Watt | 328 PPW | 192.5 PPW |
| Passmark CPU Mark / Watt | 874.8 PPW | 377.1 PPW |
| Blender / Watt | 7.11 PPW | 2.65 PPW |
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.
Recent User Tests
Intel Core Ultra 7 255HX
| Date | Benchmark | Result |
|---|---|---|
| π 2026-06-05 (Levi) | GeekBench | 2907 / 17742 |
| π 2025-12-25 (Junebug) | Cinebench 2024 | 131 / 1759 |
| π 2025-12-17 (balihardik009) | Cinebench 2024 | 131 / 1820 |
| π 2025-11-26 (Verbickisd) | Cinebench 2024 | 125 / 1666 |
| π 2025-11-24 (Abhi) | GeekBench | 2823 / 17264 |
Intel Core Ultra 7 155H
| Date | Benchmark | Result |
|---|---|---|
| π 2026-02-22 (Alex Paulino) | Cinebench 2026 | 544 / 3749 |
| π 2026-01-15 (Ak-Dev) | GeekBench | 2347 / 12862 |
| π 2025-11-08 (Anuj) | GeekBench | 2248 / 12118 |
| π 2025-07-25 (Aya) | Cinebench 2024 | 85 / 943 |
| π 2025-06-25 (Tarekcoupe) | Cinebench 2024 | 96 / 930 |
Specifications
Full technical specification of Intel Core Ultra 7 255HX and Ultra 7 155HGeneral
| Vendor | Intel | Intel |
| Released | January 6, 2025 | December 14, 2023 |
| Type | Laptop | Laptop |
| Instruction Set | x86-64 | x86-64 |
| Codename | Arrow Lake | Meteor Lake |
| Model number | 255HX | 155H |
| Integrated GPU | Arc Graphics (4-Cores) | Arc Graphics (8-Cores) |
| Rival Equivalent | - AMD Ryzen AI Max Pro 380 | - AMD Ryzen 7 8840HS |
| Successor | - | - Intel Core Ultra 7 255H |
Intel CPU rating (29th and 99th place)
CPU
| P-Cores | 8 | 6 |
| P-Threads | 8 | 12 |
| Base Frequency (P) | 2.4 GHz | 1.4 GHz |
| Turbo Boost Frequency (P) | 5.2 GHz | 4.8 GHz |
| E-Cores | 12 | 10 |
| E-Threads | 12 | 10 |
| Base Frequency (E) | 1.8 GHz | 0.9 GHz |
| Turbo Boost Frequency (E) | 4.5 GHz | 3.8 GHz |
| Total Cores | 20 | 16 |
| Total Threads | 20 | 22 |
| Bus Frequency | 100 MHz | 100 MHz |
| Multiplier | 24x | 14x |
| L1 Cache | 192K (per core) | 112K (per core) |
| L2 Cache | 2MB (per core) | 2MB (per core) |
| L3 Cache | 30MB (shared) | 24MB (shared) |
| Unlocked Multiplier | Yes | No |
Package
| Fabrication Process | 3 nm | 7 nm |
| TDP (PL1) | 45-55 W (configurable) | 20-65 W (configurable) |
| Max. Boost TDP (PL2) | 160 W | 115 W |
| Socket | FCBGA-2114 | FCBGA-2049 |
| Peak Temperature | 105Β°C | 110Β°C |
Laptop processors ranking (33rd and 127th place)
iGPU
| Integrated Graphics | Arc Graphics (4-Cores) | Arc Graphics (8-Cores) |
| GPU Base Clock | 300 MHz | 300 MHz |
| GPU Boost Clock | 1850 MHz | 2250 MHz |
| Shading Units | 512 | 1024 |
| TMUs | 32 | 64 |
| ROPs | 16 | 32 |
| Execution Units | 64 | 128 |
| TGP | 14 W | 28 W |
iGPU FLOPS
Memory Support
| Memory Types | - DDR5-6400 | - LPDDR5-7467 - LPDDR5x-7467 - DDR5-5600 |
| Max. Memory Size | 256 GB | 96 GB |
| Memory Channels | 2 | 2 |
| Max. Memory Bandwidth | 102.4 GB/s | 89.6 GB/s |
| ECC Support | Yes | No |
Misc
| Official Site | Intel Core Ultra 7 255HX official page | Intel Core Ultra 7 155H official page |
| PCI Express Version | 5.0 | 5.0 |
| PCI Express Lanes | 24 | 28 |
Cast your vote
Total votes: 13