Intel Core i7-1255U vs Intel Core Ultra 7 356H
52.8Single-core80.3
32.6Multi-core57.5
75.3Efficiencyspec-based81.4
55.7iGPU70
47.7Platformspec-based58.2
1 spec wins — Intel Core i7-1255U14 spec wins — Intel Core Ultra 7 356H
InnoReviews verdict
Intel Core Ultra 7 356H wins this laptop processor face-off, 68.2 to 48.6, pulling ahead mainly in single-core (+28) and multi-core (+25). 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
- 40% lower Base TDP: 15 W vs 25 W
Reasons to pick the Intel Core Ultra 7 356H
- Stronger single-core score: 80 vs 53
- Stronger multi-core score: 58 vs 33
- Stronger iGPU score: 70 vs 56
- 173% higher Cinebench R23 (multi): 18,586 vs 6,800
- 165% higher PassMark: 34,251 vs 12,941
General
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 356H |
|---|---|---|
| Announced | 2022 | 2026 |
| Process | 10 nm | 2 nm+80% |
| Base TDP | 15 W+40% | 25 W |
| Max TDP | 55 W | 80 W+45% |
Cores & Clocks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 356H |
|---|---|---|
| Cores | 10 | 16+60% |
| Performance cores | 2 | 4+100% |
| Efficiency cores | 8 | 12+50% |
| Threads | 12 | 16+33% |
| Base clock | 1.7 GHz | 1.9 GHz+12% |
| Boost clock | 4.7 GHz | 4.7 GHz |
| L3 cache | 12 MB | 18 MB+50% |
Integrated GPU
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 356H |
|---|---|---|
| iGPU | Intel Iris Xe (96 EU) | Intel Graphics (4 Xe3-cores) |
| iGPU clock | 1,250 MHz | 2,450 MHz |
Memory
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 356H |
|---|---|---|
| Memory support | LPDDR5-5200 / DDR5-4800 / LPDDR4X-4267 | LPDDR5X, DDR5 |
| Max memory | 64 GB | 128 GB+100% |
Benchmarks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 356H |
|---|---|---|
| Geekbench 6 (single) | 2,130Bottom 25% | — |
| Geekbench 6 (multi) | 6,600Bottom 17% | — |
| Cinebench R23 (single) | 1,600Bottom 41% | 2,033+27%Top 20% |
| Cinebench R23 (multi) | 6,800Bottom 20% | 18,586+173%Top 21% |
| PassMark | 12,941Bottom 25% | 34,251+165%Top 19% |
| 3DMark Time Spy Graphics (iGPU) | 1,496Top 42% | 2,846+90%Top 19% |
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