Intel Core i7-1255U vs Intel Core Ultra 7 251HX
52.8Single-core66.6
32.6Multi-core65.1
75.3Efficiencyspec-based44.4
55.7iGPU—
47.7Platformspec-based68.1
1 spec wins — Intel Core i7-1255U16 spec wins — Intel Core Ultra 7 251HX
InnoReviews verdict
Intel Core Ultra 7 251HX wins this laptop processor face-off, 62.6 to 48.6, pulling ahead mainly in multi-core (+32) and single-core (+14). 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
- 73% lower Base TDP: 15 W vs 55 W
Reasons to pick the Intel Core Ultra 7 251HX
- Stronger single-core score: 67 vs 53
- Stronger multi-core score: 65 vs 33
- 300% higher Max memory: 256 GB vs 64 GB
- 282% higher Cinebench R23 (multi): 26,001 vs 6,800
- 264% higher PassMark: 47,051 vs 12,941
General
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 251HX |
|---|---|---|
| Announced | 2022 | 2026 |
| Process | 10 nm | 3 nm+70% |
| Base TDP | 15 W+73% | 55 W |
| Max TDP | 55 W | 160 W+191% |
Cores & Clocks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 251HX |
|---|---|---|
| Cores | 10 | 18+80% |
| Performance cores | 2 | 6+200% |
| Efficiency cores | 8 | 12+50% |
| Threads | 12 | 18+50% |
| Base clock | 1.7 GHz | 2.9 GHz+71% |
| Boost clock | 4.7 GHz | 5.1 GHz+9% |
| L3 cache | 12 MB | 30 MB+150% |
Integrated GPU
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 251HX |
|---|---|---|
| iGPU | Intel Iris Xe (96 EU) | Intel Graphics (3 Xe) |
| iGPU clock | 1,250 MHz | 1,800 MHz |
Memory
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 251HX |
|---|---|---|
| Memory support | LPDDR5-5200 / DDR5-4800 / LPDDR4X-4267 | DDR5-6400 |
| Max memory | 64 GB | 256 GB+300% |
Benchmarks
| Spec | Intel Core i7-1255U | Intel Core Ultra 7 251HX |
|---|---|---|
| Geekbench 6 (single) | 2,130Bottom 25% | 2,762+30%Top 33% |
| Geekbench 6 (multi) | 6,600Bottom 17% | 14,233+116%Top 30% |
| Cinebench R23 (single) | 1,600Bottom 41% | 1,941+21%Top 26% |
| Cinebench R23 (multi) | 6,800Bottom 20% | 26,001+282%Top 12% |
| PassMark | 12,941Bottom 25% | 47,051+264%Top 8% |
| 3DMark Time Spy Graphics (iGPU) | 1,496Top 42% | — |
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