Intel Core Ultra 7 255HX vs Intel Core Ultra 7 251HX
74
out 100
VS
n/a
out 100
Compared 2 processors: Intel Core Ultra 7 255HX, vs Intel Core Ultra 7 251HX. Below are specs, tests, pros and cons for each device
Review
Single-Thread Perf.
Single-Core Benchmark Score
Multi-Thread Perf.
Multi-Core Benchmark Score
Energy Efficiency
Chip Power Efficiency
Integrated Graphics
iGPU Performance in Games & 3D
Tests & specs
Specs & test comparisonBenchmarks
| File Compression | 1270 MB/s | n/a |
| Clang Compilation | 187.3 KLines/s | n/a |
| HTML5 Browser | 337.9 pages/s | n/a |
| PDF Rendering | 488.3 MP/sec | n/a |
| Text Processing | 336.6 pages/s | n/a |
| Background Blur | 72.7 frames/s | n/a |
| Photo Processing | 121.8 frames/s | n/a |
| Ray Tracing | 39.7 MP/sec | n/a |
Performance/Watt
| Geekbench 6 Multi / W | 319.9 PPW | 268.6 PPW |
| Cinebench 2024 / W | 28.9 PPW | 32 PPW |
General Info
| Manufacturer | Intel | Intel |
| Announced | January, 6, 2025 | April, 1, 2026 |
| Type | Laptop use | Laptop use |
| Architecture | x86-64 | x86-64 |
| Codename | Arrow Lake | Arrow Lake |
| Model number | 255HX | 251HX |
| Integrated GPU | Arc Graphics (4-Cores) | Arc Graphics (4-Cores) |
Processor
| Cores | 8 | 8 |
| Threads | 8 | 6 |
| Frequency | 2.4 GHz | Array |
| Max Frequency (Turbo) | 5.2 GHz | 5.1 GHz |
| Cores | 12 | 12 |
| Threads | 12 | 12 |
| Frequency | 1.8 GHz | 2.5 GHz |
| Max Frequency (Turbo) | 4.5 GHz | 4.5 GHz |
| Cores count | 20 | 18 |
| Threads count | 20 | 18 |
| Bus frequency | 100 MHz | 100 MHz |
| Multiplier | 24x | 29x |
| L1 cache | 112 KB/core | 192 KB/core |
| L2 cache | 2000 KB/core | 2000 KB/core |
| L3 Cache | 30 MB total | 30 MB total |
| Unlocked multiplier | Yes | Yes |
Package
| Process tech. | 3 nm | 3 nm |
| Power (TDP) | 45-55 W | 45-55 W |
| Max TDP (Boost) | 160 W | 160 W |
| Socket | FCBGA-2114 | FCBGA-2114 |
| Critical temp. | 105 °C | 105 °C |
Memory Support
| Memory Type | DDR5-6400 | DDR5-6400 |
| Max Size | 192 GB | 256 GB |
| Channels | 2 | 2 |
| ECC support | Yes | No |
Other
| PCIe Version | 5.0 | 5.0 |
| Max PCIe Lanes | 24 | 24 |
Results
After analyzing the data, we consider Intel Core Ultra 7 255HX the clear winner in this comparison.
Survey
Total Votes: 0
