Intel Core Ultra 7 251HX vs Intel Core Ultra 7 356H
66.6Single-core80.3
65.1Multi-core57.5
44.4Efficiencyspec-based81.4
—iGPU70
68.1Platformspec-based58.2
10 spec wins — Intel Core Ultra 7 251HX3 spec wins — Intel Core Ultra 7 356H
InnoReviews verdict
Intel Core Ultra 7 356H wins this laptop processor face-off, 68.2 to 62.6, pulling ahead mainly in single-core (+14). Intel Core Ultra 7 251HX 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 Ultra 7 251HX
- Stronger multi-core score: 65 vs 58
- 100% higher Max TDP: 160 W vs 80 W
- 100% higher Max memory: 256 GB vs 128 GB
- 67% higher L3 cache: 30 MB vs 18 MB
- 53% higher Base clock: 2.9 GHz vs 1.9 GHz
Reasons to pick the Intel Core Ultra 7 356H
- Stronger single-core score: 80 vs 67
- 55% lower Base TDP: 25 W vs 55 W
- 33% lower process: 2 nm vs 3 nm
General
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 356H |
|---|---|---|
| Announced | 2026 | 2026 |
| Process | 3 nm | 2 nm+33% |
| Base TDP | 55 W | 25 W+55% |
| Max TDP | 160 W+100% | 80 W |
Cores & Clocks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 356H |
|---|---|---|
| Cores | 18+13% | 16 |
| Performance cores | 6+50% | 4 |
| Efficiency cores | 12 | 12 |
| Threads | 18+13% | 16 |
| Base clock | 2.9 GHz+53% | 1.9 GHz |
| Boost clock | 5.1 GHz+9% | 4.7 GHz |
| L3 cache | 30 MB+67% | 18 MB |
Integrated GPU
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 356H |
|---|---|---|
| iGPU | Intel Graphics (3 Xe) | Intel Graphics (4 Xe3-cores) |
| iGPU clock | 1,800 MHz | 2,450 MHz |
Memory
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 356H |
|---|---|---|
| Memory support | DDR5-6400 | LPDDR5X, DDR5 |
| Max memory | 256 GB+100% | 128 GB |
Benchmarks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 356H |
|---|---|---|
| Geekbench 6 (single) | 2,762Top 33% | — |
| Geekbench 6 (multi) | 14,233Top 30% | — |
| Cinebench R23 (single) | 1,941Top 26% | 2,033+5%Top 20% |
| Cinebench R23 (multi) | 26,001+40%Top 12% | 18,586Top 21% |
| PassMark | 47,051+37%Top 8% | 34,251Top 19% |
| 3DMark Time Spy Graphics (iGPU) | — | 2,846Top 19% |
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