Intel Core Ultra 7 251HX vs Intel Core Ultra X9 388H
66.6Single-core74.6
65.1Multi-core61.3
44.4Efficiencyspec-based81.4
—iGPU88.3
68.1Platformspec-based56.4
9 spec wins — Intel Core Ultra 7 251HX5 spec wins — Intel Core Ultra X9 388H
InnoReviews verdict
Intel Core Ultra X9 388H wins this laptop processor face-off, 69.6 to 62.6, pulling ahead mainly in single-core (+8). 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 61
- 167% higher Max memory: 256 GB vs 96 GB
- 100% higher Max TDP: 160 W vs 80 W
- 67% higher L3 cache: 30 MB vs 18 MB
- 50% higher Performance cores: 6 vs 4
Reasons to pick the Intel Core Ultra X9 388H
- Stronger single-core score: 75 vs 67
- 55% lower Base TDP: 25 W vs 55 W
- 33% lower process: 2 nm vs 3 nm
- 22% higher Geekbench 6 (multi): 17,395 vs 14,233
- 13% higher Cinebench R23 (single): 2,201 vs 1,941
General
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra X9 388H |
|---|---|---|
| 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 X9 388H |
|---|---|---|
| Cores | 18+13% | 16 |
| Performance cores | 6+50% | 4 |
| Efficiency cores | 12 | 12 |
| Threads | 18+13% | 16 |
| Base clock | 2.9 GHz+38% | 2.1 GHz |
| Boost clock | 5.1 GHz | 5.1 GHz |
| L3 cache | 30 MB+67% | 18 MB |
Integrated GPU
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra X9 388H |
|---|---|---|
| iGPU | Intel Graphics (3 Xe) | Intel Arc B390 |
| iGPU clock | 1,800 MHz | 2,500 MHz |
Memory
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra X9 388H |
|---|---|---|
| Memory support | DDR5-6400 | LPDDR5X |
| Max memory | 256 GB+167% | 96 GB |
Benchmarks
| Spec | Intel Core Ultra 7 251HX | Intel Core Ultra X9 388H |
|---|---|---|
| Geekbench 6 (single) | 2,762Top 33% | 3,038+10%Top 19% |
| Geekbench 6 (multi) | 14,233Top 30% | 17,395+22%Top 16% |
| Cinebench R23 (single) | 1,941Top 26% | 2,201+13%Top 7% |
| Cinebench R23 (multi) | 26,001+37%Top 12% | 18,911Top 19% |
| PassMark | 47,051+29%Top 8% | 36,409Top 16% |
| 3DMark Time Spy Graphics (iGPU) | — | 6,501Top 3% |
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 X9 388Hvs AMD Ryzen 9 9955HXVSIntel Core Ultra X9 388Hvs Apple M5 (10-core)VSIntel Core Ultra X9 388Hvs Intel Core Ultra 7 356HVSIntel Core Ultra X9 388Hvs AMD Ryzen AI 9 HX 470VS