Intel Core i7-1255U vs Intel Core Ultra 7 155H
52.8Single-core56.9
32.6Multi-core48.3
75.3Efficiencyspec-based66.9
55.7iGPU72.7
47.7Platformspec-based63.1
2 spec wins — Intel Core i7-1255U16 spec wins — Intel Core Ultra 7 155H
InnoReviews verdict
Intel Core Ultra 7 155H wins this laptop processor face-off, 57.9 to 48.6, pulling ahead mainly in iGPU (+17) and multi-core (+16). Intel Core i7-1255U 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 i7-1255U
- 46% lower Base TDP: 15 W vs 28 W
- 21% higher Base clock: 1.7 GHz vs 1.4 GHz
Reasons to pick the Intel Core Ultra 7 155H
- Stronger single-core score: 57 vs 53
- Stronger multi-core score: 48 vs 33
- Stronger iGPU score: 73 vs 56
- 200% higher Performance cores: 6 vs 2
- 119% higher Cinebench R23 (multi): 14,900 vs 6,800
General
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 155H |
|---|---|---|
| Announced | 2022 | 2023 |
| Process | 10 nm | 7 nm+30% |
| Base TDP | 15 W+46% | 28 W |
| Max TDP | 55 W | 115 W+109% |
Cores & Clocks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 155H |
|---|---|---|
| Cores | 10 | 16+60% |
| Performance cores | 2 | 6+200% |
| Efficiency cores | 8 | 10+25% |
| Threads | 12 | 22+83% |
| Base clock | 1.7 GHz+21% | 1.4 GHz |
| Boost clock | 4.7 GHz | 4.8 GHz+2% |
| L3 cache | 12 MB | 24 MB+100% |
Integrated GPU
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 155H |
|---|---|---|
| iGPU | Intel Iris Xe (96 EU) | Intel Arc Graphics (8 Xe) |
| iGPU clock | 1,250 MHz | 2,250 MHz |
Memory
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 155H |
|---|---|---|
| Memory support | LPDDR5-5200 / DDR5-4800 / LPDDR4X-4267 | LPDDR5X-7467 / DDR5-5600 |
| Max memory | 64 GB | 96 GB+50% |
Benchmarks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 155H |
|---|---|---|
| Geekbench 6 (single) | 2,130Bottom 21% | 2,320+9%Bottom 32% |
| Geekbench 6 (multi) | 6,600Bottom 16% | 12,100+83%Top 46% |
| Cinebench R23 (single) | 1,600Bottom 35% | 1,700+6%Bottom 45% |
| Cinebench R23 (multi) | 6,800Bottom 19% | 14,900+119%Top 35% |
| PassMark | 12,941Bottom 23% | 24,448+89%Top 38% |
| 3DMark Time Spy Graphics (iGPU) | 1,496Top 43% | 3,225+116%Top 13% |
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