Intel Core i7-1355U vs Intel Core Ultra 7 255H
60.9Single-core69.7
37.1Multi-core56.8
75.3Efficiencyspec-based75.7
55.7iGPU75.9
50.3Platformspec-based60.5
1 spec wins — Intel Core i7-1355U17 spec wins — Intel Core Ultra 7 255H
InnoReviews verdict
Intel Core Ultra 7 255H wins this laptop processor face-off, 65.3 to 52.6, pulling ahead mainly in iGPU (+20) and multi-core (+20). Intel Core i7-1355U 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 i7-1355U
- 46% lower Base TDP: 15 W vs 28 W
Reasons to pick the Intel Core Ultra 7 255H
- Stronger single-core score: 70 vs 61
- Stronger multi-core score: 57 vs 37
- Stronger iGPU score: 76 vs 56
- 200% higher Performance cores: 6 vs 2
- 149% higher 3DMark Time Spy Graphics (iGPU): 3,719 vs 1,496
General
| Spec | Intel Core i7-1355U | Intel Core Ultra 7 255H |
|---|---|---|
| Announced | 2023 | 2025 |
| Process | 10 nm | 3 nm+70% |
| Base TDP | 15 W+46% | 28 W |
| Max TDP | 55 W | 115 W+109% |
Cores & Clocks
| Spec | Intel Core i7-1355U | Intel Core Ultra 7 255H |
|---|---|---|
| Cores | 10 | 16+60% |
| Performance cores | 2 | 6+200% |
| Efficiency cores | 8 | 10+25% |
| Threads | 12 | 16+33% |
| Base clock | 1.7 GHz | 2 GHz+18% |
| Boost clock | 5 GHz | 5.1 GHz+2% |
| L3 cache | 12 MB | 24 MB+100% |
Integrated GPU
| Spec | Intel Core i7-1355U | Intel Core Ultra 7 255H |
|---|---|---|
| iGPU | Intel Iris Xe (96 EU) | Intel Arc 140T |
| iGPU clock | 1,300 MHz | 2,250 MHz |
Memory
| Spec | Intel Core i7-1355U | Intel Core Ultra 7 255H |
|---|---|---|
| Memory support | LPDDR5-6400 / DDR5-5200 / DDR4-3200 / LPDDR4X-4267 | LPDDR5X-8400 / DDR5-6400 |
| Max memory | 96 GB | 128 GB+33% |
Benchmarks
| Spec | Intel Core i7-1355U | Intel Core Ultra 7 255H |
|---|---|---|
| Geekbench 6 (single) | 2,491Top 50% | 2,851+14%Top 29% |
| Geekbench 6 (multi) | 8,984Bottom 32% | 15,362+71%Top 23% |
| Cinebench R23 (single) | 1,805Top 38% | 2,055+14%Top 18% |
| Cinebench R23 (multi) | 8,637Bottom 29% | 18,624+116%Top 20% |
| PassMark | 13,837Bottom 27% | 30,782+122%Top 21% |
| 3DMark Time Spy Graphics (iGPU) | 1,496Top 42% | 3,719+149%Top 7% |
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