Intel Core Ultra 7 155U vs Intel Core Ultra 7 251HX
54.1Single-core66.6
38.4Multi-core65.1
81.9Efficiencyspec-based44.4
51.8Platformspec-based68.1
1 spec wins — Intel Core Ultra 7 155U16 spec wins — Intel Core Ultra 7 251HX
InnoReviews verdict
Intel Core Ultra 7 251HX wins this laptop processor face-off, 62.6 to 52.3, pulling ahead mainly in multi-core (+27) and single-core (+12). Intel Core Ultra 7 155U still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Intel Core Ultra 7 155U
- 73% lower Base TDP: 15 W vs 55 W
Reasons to pick the Intel Core Ultra 7 251HX
- Stronger single-core score: 67 vs 54
- Stronger multi-core score: 65 vs 38
- 200% higher Performance cores: 6 vs 2
- 192% higher PassMark: 47,051 vs 16,133
- 181% higher Max TDP: 160 W vs 57 W
General
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 251HX |
|---|---|---|
| Announced | 2023 | 2026 |
| Process | 7 nm | 3 nm+57% |
| Base TDP | 15 W+73% | 55 W |
| Max TDP | 57 W | 160 W+181% |
Cores & Clocks
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 251HX |
|---|---|---|
| Cores | 12 | 18+50% |
| Performance cores | 2 | 6+200% |
| Efficiency cores | 10 | 12+20% |
| Threads | 14 | 18+29% |
| Base clock | 1.7 GHz | 2.9 GHz+71% |
| Boost clock | 4.8 GHz | 5.1 GHz+6% |
| L3 cache | 12 MB | 30 MB+150% |
Integrated GPU
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 251HX |
|---|---|---|
| iGPU | Intel Graphics (4 Xe) | Intel Graphics (3 Xe) |
| iGPU clock | 1,950 MHz | 1,800 MHz |
Memory
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 251HX |
|---|---|---|
| Memory support | LPDDR5X-7467 / DDR5-5600 | DDR5-6400 |
| Max memory | 96 GB | 256 GB+167% |
Benchmarks
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 251HX |
|---|---|---|
| Geekbench 6 (single) | 2,195Bottom 30% | 2,762+26%Top 33% |
| Geekbench 6 (multi) | 8,981Bottom 31% | 14,233+58%Top 30% |
| Cinebench R23 (single) | 1,627Bottom 44% | 1,941+19%Top 26% |
| Cinebench R23 (multi) | 9,627Bottom 37% | 26,001+170%Top 12% |
| PassMark | 16,133Bottom 34% | 47,051+192%Top 8% |
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