Intel Core i7-1255U vs Intel Core Ultra X9 388H
35.6Single-core61.9
20Multi-core58.7
75.3Efficiency81.4
34iGPU—
47.7Platform50.7
1 spec wins — Intel Core i7-1255U12 spec wins — Intel Core Ultra X9 388H
InnoReviews verdict
Intel Core Ultra X9 388H wins this laptop processor face-off, 62.1 to 37.8, pulling ahead mainly in Multi-core (+39) and Single-core (+26). 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: 62 vs 36
- Stronger Multi-core score: 59 vs 20
- Stronger efficiency score: 81 vs 75
- Stronger platform score: 51 vs 48
- 168% higher Geekbench 6 (multi): 17,687 vs 6,600
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 | — |
Memory
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| Memory support | LPDDR5-5200 / DDR5-4800 / LPDDR4X-4267 | LPDDR5X |
| Max memory | 64 GB | — |
Benchmarks
| Spec | Intel Core i7-1255U | Intel Core Ultra X9 388H |
|---|---|---|
| Geekbench 6 (single) | 2,130Top 93% | 3,057+44%Top 23% |
| Geekbench 6 (multi) | 6,600Top 99% | 17,687+168%Top 21% |
| Cinebench R23 (single) | 1,600Top 79% | — |
| Cinebench R23 (multi) | 6,800Top 98% | — |
| PassMark | 13,000Top 98% | — |
Related comparisons
Intel Core i7-1255Uvs AMD Ryzen 7 5800HVSIntel Core i7-1255Uvs Intel Core i5-12500HVSIntel Core i7-1255Uvs AMD Ryzen 5 7535HSVSIntel Core i7-1255Uvs Apple M1 (8-core)VSIntel Core Ultra X9 388Hvs Apple M4 (10-core)VSIntel Core Ultra X9 388Hvs Intel Core i9-14900HXVSIntel Core Ultra X9 388Hvs AMD Ryzen AI 9 365VSIntel Core Ultra X9 388Hvs Intel Core Ultra 9 285HVS