Intel Core Ultra 7 155U vs Intel Core Ultra 7 255HX
54.1Single-core72.8
38.4Multi-core73.8
81.9Efficiencyspec-based44.4
51.8Platformspec-based69.6
1 spec wins — Intel Core Ultra 7 155U16 spec wins — Intel Core Ultra 7 255HX
InnoReviews verdict
Intel Core Ultra 7 255HX wins this laptop processor face-off, 67.9 to 52.3, pulling ahead mainly in multi-core (+35) and single-core (+19). 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 255HX
- Stronger single-core score: 73 vs 54
- Stronger multi-core score: 74 vs 38
- 300% higher Performance cores: 8 vs 2
- 230% higher Cinebench R23 (multi): 31,781 vs 9,627
- 197% higher PassMark: 47,933 vs 16,133
General
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255HX |
|---|---|---|
| Announced | 2023 | 2025 |
| 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 255HX |
|---|---|---|
| Cores | 12 | 20+67% |
| Performance cores | 2 | 8+300% |
| Efficiency cores | 10 | 12+20% |
| Threads | 14 | 20+43% |
| Base clock | 1.7 GHz | 2.4 GHz+41% |
| Boost clock | 4.8 GHz | 5.2 GHz+8% |
| L3 cache | 12 MB | 30 MB+150% |
Integrated GPU
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255HX |
|---|---|---|
| iGPU | Intel Graphics (4 Xe) | Intel Graphics (4 Xe-cores) |
| iGPU clock | 1,950 MHz | 1,850 MHz |
Memory
| Spec | Intel Core Ultra 7 155U | Intel Core Ultra 7 255HX |
|---|---|---|
| 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 255HX |
|---|---|---|
| Geekbench 6 (single) | 2,195Bottom 25% | 2,959+35%Top 17% |
| Geekbench 6 (multi) | 8,981Bottom 31% | 17,915+99%Top 12% |
| Cinebench R23 (single) | 1,627Bottom 39% | 2,154+32%Top 10% |
| Cinebench R23 (multi) | 9,627Bottom 35% | 31,781+230%Top 6% |
| PassMark | 16,133Bottom 34% | 47,933+197%Top 8% |
Related comparisons
Intel Core Ultra 7 155Uvs Intel Core i7-1360PVSIntel Core Ultra 7 155Uvs Intel Core 7 230HVSIntel Core Ultra 7 155Uvs Intel Core i7-1355UVSIntel Core Ultra 7 155Uvs Intel Core i7-12700HVSIntel Core Ultra 7 255HXvs AMD Ryzen AI 9 HX 470VSIntel Core Ultra 7 255HXvs Intel Core Ultra 7 356HVSIntel Core Ultra 7 255HXvs Intel Core Ultra X7 358HVSIntel Core Ultra 7 255HXvs Qualcomm Snapdragon X2 Elite X2E-80-100VS