Intel Core Ultra 7 251HX vs Intel Core Ultra 7 355
66.6Single-core66.5
65.1Multi-core43.7
44.4Efficiencyspec-based81.4
—iGPU70.1
68.1Platformspec-based49.2
13 spec wins — Intel Core Ultra 7 251HX3 spec wins — Intel Core Ultra 7 355
InnoReviews verdict
Intel Core Ultra 7 251HX wins this laptop processor face-off, 62.6 to 58.5, pulling ahead mainly in multi-core (+21) and single-core (+0). Intel Core Ultra 7 355 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 44
- 200% higher Efficiency cores: 12 vs 4
- 191% higher Max TDP: 160 W vs 55 W
- 150% higher L3 cache: 30 MB vs 12 MB
- 134% higher PassMark: 47,051 vs 20,125
Reasons to pick the Intel Core Ultra 7 355
- 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 7 355 |
|---|---|---|
| Announced | 2026 | 2026 |
| Process | 3 nm | 2 nm+33% |
| Base TDP | 55 W | 25 W+55% |
| Max TDP | 160 W+191% | 55 W |
Cores & Clocks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 355 |
|---|---|---|
| Cores | 18+125% | 8 |
| Performance cores | 6+50% | 4 |
| Efficiency cores | 12+200% | 4 |
| Threads | 18+125% | 8 |
| Base clock | 2.9 GHz+26% | 2.3 GHz |
| Boost clock | 5.1 GHz+9% | 4.7 GHz |
| L3 cache | 30 MB+150% | 12 MB |
Integrated GPU
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 355 |
|---|---|---|
| iGPU | Intel Graphics (3 Xe) | Intel Graphics (4 Xe3-cores) |
| iGPU clock | 1,800 MHz | 2,500 MHz |
Memory
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 355 |
|---|---|---|
| Memory support | DDR5-6400 | LPDDR5X-7467 / DDR5-6400 |
| Max memory | 256 GB+100% | 128 GB |
Benchmarks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 355 |
|---|---|---|
| Geekbench 6 (single) | 2,762+1%Top 32% | 2,725Top 37% |
| Geekbench 6 (multi) | 14,233+25%Top 29% | 11,367Top 50% |
| Cinebench R23 (single) | 1,941Top 26% | 1,958+1%Top 23% |
| Cinebench R23 (multi) | 26,001+131%Top 11% | 11,261Bottom 48% |
| PassMark | 47,051+134%Top 8% | 20,125Top 50% |
| 3DMark Time Spy Graphics (iGPU) | — | 2,865Top 20% |
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