Intel Core Ultra 7 251HX vs Intel Core Ultra 9 275HX
66.6Single-core75.3
65.1Multi-core83.1
44.4Efficiencyspec-based44.4
—iGPU60.5
68.1Platformspec-based73.9
2 spec wins — Intel Core Ultra 7 251HX11 spec wins — Intel Core Ultra 9 275HX
InnoReviews verdict
Intel Core Ultra 9 275HX wins this laptop processor face-off, 71.7 to 62.6, pulling ahead mainly in multi-core (+18) and single-core (+9). 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
No decisive spec advantages — this side competes on price and preference.
Reasons to pick the Intel Core Ultra 9 275HX
- Stronger single-core score: 75 vs 67
- Stronger multi-core score: 83 vs 65
- 53% higher Geekbench 6 (multi): 21,800 vs 14,233
- 35% higher Cinebench R23 (multi): 35,000 vs 26,001
- 33% higher cores: 24 vs 18
General
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Announced | 2026 | 2025 |
| Process | 3 nm | 3 nm |
| Base TDP | 55 W | 55 W |
| Max TDP | 160 W | 160 W |
Cores & Clocks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Cores | 18 | 24+33% |
| Performance cores | 6 | 8+33% |
| Efficiency cores | 12 | 16+33% |
| Threads | 18 | 24+33% |
| Base clock | 2.9 GHz+7% | 2.7 GHz |
| Boost clock | 5.1 GHz | 5.4 GHz+6% |
| L3 cache | 30 MB | 36 MB+20% |
Integrated GPU
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 9 275HX |
|---|---|---|
| iGPU | Intel Graphics (3 Xe) | Intel Arc Graphics (4 Xe) |
| iGPU clock | 1,800 MHz | 2,000 MHz |
Memory
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Memory support | DDR5-6400 | DDR5-6400 |
| Max memory | 256 GB | 256 GB |
Benchmarks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Geekbench 6 (single) | 2,762Top 33% | 3,100+12%Top 14% |
| Geekbench 6 (multi) | 14,233Top 30% | 21,800+53%Top 7% |
| Cinebench R23 (single) | 1,941Top 26% | 2,200+13%Top 8% |
| Cinebench R23 (multi) | 26,001Top 12% | 35,000+35%Top 6% |
| PassMark | 47,051Top 8% | 55,712+18%Top 6% |
| 3DMark Time Spy Graphics (iGPU) | — | 1,855Top 36% |
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