Intel Core Ultra 7 251HX vs Intel Core Ultra 7 255H
66.6Single-core69.7
65.1Multi-core56.8
44.4Efficiencyspec-based75.7
—iGPU75.9
68.1Platformspec-based60.5
10 spec wins — Intel Core Ultra 7 251HX4 spec wins — Intel Core Ultra 7 255H
InnoReviews verdict
Intel Core Ultra 7 255H wins this laptop processor face-off, 65.3 to 62.6, pulling ahead mainly in single-core (+3). 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 57
- 100% higher Max memory: 256 GB vs 128 GB
- 53% higher PassMark: 47,051 vs 30,782
- 45% higher Base clock: 2.9 GHz vs 2 GHz
- 40% higher Cinebench R23 (multi): 26,001 vs 18,624
Reasons to pick the Intel Core Ultra 7 255H
- Stronger single-core score: 70 vs 67
- 49% lower Base TDP: 28 W vs 55 W
General
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 255H |
|---|---|---|
| Announced | 2026 | 2025 |
| Process | 3 nm | 3 nm |
| Base TDP | 55 W | 28 W+49% |
| Max TDP | 160 W+39% | 115 W |
Cores & Clocks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 255H |
|---|---|---|
| Cores | 18+13% | 16 |
| Performance cores | 6 | 6 |
| Efficiency cores | 12+20% | 10 |
| Threads | 18+13% | 16 |
| Base clock | 2.9 GHz+45% | 2 GHz |
| Boost clock | 5.1 GHz | 5.1 GHz |
| L3 cache | 30 MB+25% | 24 MB |
Integrated GPU
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 255H |
|---|---|---|
| iGPU | Intel Graphics (3 Xe) | Intel Arc 140T |
| iGPU clock | 1,800 MHz | 2,250 MHz |
Memory
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 255H |
|---|---|---|
| Memory support | DDR5-6400 | LPDDR5X-8400 / DDR5-6400 |
| Max memory | 256 GB+100% | 128 GB |
Benchmarks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra 7 255H |
|---|---|---|
| Geekbench 6 (single) | 2,762Top 33% | 2,851+3%Top 29% |
| Geekbench 6 (multi) | 14,233Top 30% | 15,362+8%Top 23% |
| Cinebench R23 (single) | 1,941Top 26% | 2,055+6%Top 18% |
| Cinebench R23 (multi) | 26,001+40%Top 12% | 18,624Top 20% |
| PassMark | 47,051+53%Top 8% | 30,782Top 21% |
| 3DMark Time Spy Graphics (iGPU) | — | 3,719Top 7% |
Related comparisons
Intel Core Ultra 7 251HXvs Apple M3 Pro (12-core)VSIntel Core Ultra 7 251HXvs AMD Ryzen AI 7 450VSIntel Core Ultra 7 251HXvs Intel Core i9-14900HXVSIntel Core Ultra 7 251HXvs Intel Core i9-13980HXVSIntel Core Ultra 7 255Hvs Apple M4 (10-core)VSIntel Core Ultra 7 255Hvs AMD Ryzen 9 7945HXVSIntel Core Ultra 7 255Hvs AMD Ryzen AI 9 365VSIntel Core Ultra 7 255Hvs Intel Core Ultra 9 285HVS