Intel has quietly expanded its Arrow Lake-HX laptop CPU family with another high-performance option: the Core Ultra 7 251HX. After appearing in a few early laptop listings recently, the chip is now fully official, with its specifications published on Intel’s own product pages—no launch event, no big announcement, just a new processor suddenly added to the lineup.
The Intel Core Ultra 7 251HX slots in as a smaller sibling to the Core Ultra 7 255HX, and the biggest difference is the core configuration. While the 255HX uses a 20-core/20-thread setup, the new 251HX comes with 18 cores and 18 threads. Specifically, it features 6 Performance cores and 12 Efficient cores, trimming the Performance-core count compared to the 255HX (which has 8 P-cores) while keeping the Efficient-core side the same.
Even with fewer Performance cores, many of the platform-level specs look familiar. Intel lists the same 45W to 160W power range, the same 30 MB cache figure, and a similar overall feature set, suggesting the 251HX is designed to offer much of the same Arrow Lake-HX experience at a slightly lower tier.
Clock speeds are a mixed story—and potentially interesting for buyers comparing laptops. The Core Ultra 7 251HX reaches up to 5.1 GHz max turbo, which is 100 MHz below the 255HX. However, base clocks are notably higher in a couple of areas: the Efficient-core base frequency is listed at 2.5 GHz, a sizable jump over the 255HX, and the Performance-core base frequency also gets an uplift. In real-world terms, that could make the 251HX feel snappy under sustained mixed workloads, depending on laptop cooling and power settings.
Integrated graphics is where the 251HX clearly steps down. It includes 3 Xe3 GPU cores rather than the 4 found on the Core Ultra 7 255HX. Along with reduced graphics capability, this also lowers the chip’s AI performance rating. Intel rates the Core Ultra 7 251HX at up to 30 AI TOPS, compared to 33 AI TOPS on the Core Ultra 7 255HX.
In the Arrow Lake-HX stack, that positioning makes sense: the Core Ultra 7 251HX lands between the Core Ultra 5 245HX and the Core Ultra 7 255HX. For shoppers, it’s likely to show up in high-performance gaming and creator laptops that want strong CPU boosting and modern platform features, but don’t necessarily need the full Performance-core count—or the slightly stronger integrated graphics—of the higher model.
Here’s what to remember if you’re comparing specs while shopping: Core Ultra 7 251HX brings 6P+12E cores (18 total), up to 5.1 GHz turbo, a wide 45W–160W power range, and a trimmed Xe3 iGPU configuration, creating a new in-between option in Intel’s Core Ultra 200 Arrow Lake-HX laptop CPU lineup.
