Intel Core Ultra 7 255HX vs Intel Core Ultra 9 275HX
72.8Single-core75.3
73.8Multi-core83.1
44.4Efficiencyspec-based44.4
—iGPU60.5
69.6Platformspec-based73.9
0 spec wins — Intel Core Ultra 7 255HX11 spec wins — Intel Core Ultra 9 275HX
InnoReviews verdict
Intel Core Ultra 9 275HX wins this laptop processor face-off, 71.7 to 67.9, pulling ahead mainly in multi-core (+9) and single-core (+3). Intel Core Ultra 7 255HX 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 255HX
No decisive spec advantages — this side competes on price and preference.
Reasons to pick the Intel Core Ultra 9 275HX
- Stronger multi-core score: 83 vs 74
- 33% higher Efficiency cores: 16 vs 12
- 22% higher Geekbench 6 (multi): 21,800 vs 17,915
- 20% higher cores: 24 vs 20
- 20% higher threads: 24 vs 20
General
| Spec | Intel Core Ultra 7 255HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Announced | 2025 | 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 255HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Cores | 20 | 24+20% |
| Performance cores | 8 | 8 |
| Efficiency cores | 12 | 16+33% |
| Threads | 20 | 24+20% |
| Base clock | 2.4 GHz | 2.7 GHz+13% |
| Boost clock | 5.2 GHz | 5.4 GHz+4% |
| L3 cache | 30 MB | 36 MB+20% |
Integrated GPU
| Spec | Intel Core Ultra 7 255HX | Intel Core Ultra 9 275HX |
|---|---|---|
| iGPU | Intel Graphics (4 Xe-cores) | Intel Arc Graphics (4 Xe) |
| iGPU clock | 1,850 MHz | 2,000 MHz |
Memory
| Spec | Intel Core Ultra 7 255HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Memory support | DDR5-6400 | DDR5-6400 |
| Max memory | 256 GB | 256 GB |
Benchmarks
| Spec | Intel Core Ultra 7 255HX | Intel Core Ultra 9 275HX |
|---|---|---|
| Geekbench 6 (single) | 2,959Top 17% | 3,100+5%Top 12% |
| Geekbench 6 (multi) | 17,915Top 12% | 21,800+22%Top 5% |
| Cinebench R23 (single) | 2,154Top 10% | 2,200+2%Top 6% |
| Cinebench R23 (multi) | 31,781Top 6% | 35,000+10%Top 5% |
| PassMark | 47,933Top 8% | 55,712+16%Top 5% |
| 3DMark Time Spy Graphics (iGPU) | — | 1,855Top 37% |
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