Intel Core Ultra 7 155U vs Intel Core Ultra 7 255H
54.1Single-core69.7
38.4Multi-core56.8
81.9Efficiencyspec-based75.7
—iGPU75.9
51.8Platformspec-based60.5
1 spec wins — Intel Core Ultra 7 155U15 spec wins — Intel Core Ultra 7 255H
InnoReviews verdict
Intel Core Ultra 7 255H wins this laptop processor face-off, 65.3 to 52.3, pulling ahead mainly in multi-core (+18) and single-core (+16). 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
- 46% lower Base TDP: 15 W vs 28 W
Reasons to pick the Intel Core Ultra 7 255H
- Stronger single-core score: 70 vs 54
- Stronger multi-core score: 57 vs 38
- 200% higher Performance cores: 6 vs 2
- 102% higher Max TDP: 115 W vs 57 W
- 100% higher L3 cache: 24 MB vs 12 MB
General
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255H |
|---|---|---|
| Announced | 2023 | 2025 |
| Process | 7 nm | 3 nm+57% |
| Base TDP | 15 W+46% | 28 W |
| Max TDP | 57 W | 115 W+102% |
Cores & Clocks
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255H |
|---|---|---|
| Cores | 12 | 16+33% |
| Performance cores | 2 | 6+200% |
| Efficiency cores | 10 | 10 |
| Threads | 14 | 16+14% |
| Base clock | 1.7 GHz | 2 GHz+18% |
| Boost clock | 4.8 GHz | 5.1 GHz+6% |
| L3 cache | 12 MB | 24 MB+100% |
Integrated GPU
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255H |
|---|---|---|
| iGPU | Intel Graphics (4 Xe) | Intel Arc 140T |
| iGPU clock | 1,950 MHz | 2,250 MHz |
Memory
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255H |
|---|---|---|
| Memory support | LPDDR5X-7467 / DDR5-5600 | LPDDR5X-8400 / DDR5-6400 |
| Max memory | 96 GB | 128 GB+33% |
Benchmarks
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255H |
|---|---|---|
| Geekbench 6 (single) | 2,195Bottom 30% | 2,851+30%Top 29% |
| Geekbench 6 (multi) | 8,981Bottom 31% | 15,362+71%Top 23% |
| Cinebench R23 (single) | 1,627Bottom 44% | 2,055+26%Top 18% |
| Cinebench R23 (multi) | 9,627Bottom 37% | 18,624+93%Top 20% |
| PassMark | 16,133Bottom 34% | 30,782+91%Top 21% |
| 3DMark Time Spy Graphics (iGPU) | — | 3,719Top 7% |
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