Intel Core i7-1255U vs Intel Core Ultra X9 388H
52.8Single-core74.6
32.6Multi-core61.3
75.3Efficiencyspec-based81.4
55.7iGPU88.3
47.7Platformspec-based56.4
1 spec wins — Intel Core i7-1255U17 spec wins — Intel Core Ultra X9 388H
InnoReviews verdict
Intel Core Ultra X9 388H wins this laptop processor face-off, 69.6 to 48.6, pulling ahead mainly in iGPU (+33) and multi-core (+29). 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 X9 388H
- Stronger single-core score: 75 vs 53
- Stronger multi-core score: 61 vs 33
- Stronger iGPU score: 88 vs 56
- 335% higher 3DMark Time Spy Graphics (iGPU): 6,501 vs 1,496
- 181% higher PassMark: 36,409 vs 12,941
General
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| 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 X9 388H |
|---|---|---|
| Cores | 10 | 16+60% |
| Performance cores | 2 | 4+100% |
| Efficiency cores | 8 | 12+50% |
| Threads | 12 | 16+33% |
| Base clock | 1.7 GHz | 2.1 GHz+24% |
| Boost clock | 4.7 GHz | 5.1 GHz+9% |
| L3 cache | 12 MB | 18 MB+50% |
Integrated GPU
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| iGPU | Intel Iris Xe (96 EU) | Intel Arc B390 |
| iGPU clock | 1,250 MHz | 2,500 MHz |
Memory
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| Memory support | LPDDR5-5200 / DDR5-4800 / LPDDR4X-4267 | LPDDR5X |
| Max memory | 64 GB | 96 GB+50% |
Benchmarks
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| Geekbench 6 (single) | 2,130Bottom 21% | 3,038+43%Top 15% |
| Geekbench 6 (multi) | 6,600Bottom 16% | 17,395+164%Top 13% |
| Cinebench R23 (single) | 1,600Bottom 35% | 2,201+38%Top 6% |
| Cinebench R23 (multi) | 6,800Bottom 19% | 18,911+178%Top 19% |
| PassMark | 12,941Bottom 23% | 36,409+181%Top 15% |
| 3DMark Time Spy Graphics (iGPU) | 1,496Top 43% | 6,501+335%Top 3% |
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