Intel’s latest Core Ultra 200HX laptop processor lineup is starting to look very competitive, especially in performance-per-watt. A newly surfaced Cinebench R23 result for the Core Ultra 7 251HX suggests that the chip can outperform the previous-generation Core i9-14900HX at lower power limits, despite having fewer CPU cores.
The Core Ultra 7 251HX is part of Intel’s Arrow Lake-HX family for high-performance laptops. It sits between the Core Ultra 5 245HX and the Core Ultra 7 255HX, offering an 18-core configuration made up of 6 Performance cores and 12 Efficiency cores. That gives it fewer cores than the Core Ultra 7 255HX, which uses an 8 Performance core and 12 Efficiency core layout, so it is expected to trail its bigger sibling in heavily multi-threaded workloads.
However, the more interesting comparison is against Intel’s older flagship mobile processor, the Core i9-14900HX. That chip is based on the Raptor Lake Refresh architecture and features 24 cores and 32 threads, with 8 Performance cores and 16 Efficiency cores. On paper, the Core i9-14900HX has a clear advantage in core count, but the leaked results show that Arrow Lake-HX may be significantly more efficient.
According to the reported Cinebench R23 multi-core benchmark, the Core Ultra 7 251HX scores close to 30,000 points when running at around 140W. That puts it in the same performance range as the Core i9-14900HX operating near its full potential. Matching a 24-core flagship laptop CPU with an 18-core chip is already notable, but the real advantage appears when power limits are reduced.
At around 50W, the Core Ultra 7 251HX reportedly crosses the 20,000-point mark in Cinebench R23 multi-core testing. By comparison, the Core i9-14900HX is said to land closer to 18,000 points at the same power level. That gives the newer Core Ultra processor a meaningful lead in efficiency, making it especially appealing for gaming laptops, creator notebooks, and mobile workstations where thermal limits and battery behavior matter.
The gap is also said to remain visible around the 70W range, where the Core Ultra 7 251HX continues to hold an advantage. As the power limit approaches 100W, the difference between the two processors becomes much smaller, and at higher wattage levels the chips perform more similarly. Even so, the fact that the Core Ultra 7 251HX can deliver stronger multi-core performance at lower power levels is an important sign of progress for Intel’s new mobile CPU architecture.
Another important point is that the Core Ultra 7 251HX achieves these results with lower maximum boost clocks than the Core i9-14900HX. This makes the efficiency improvement even more noteworthy, as the chip is not simply relying on higher clock speeds to close the gap.
That said, the Core Ultra 7 251HX does not beat every processor in its own family. The Core Ultra 7 255HX, which comes with two additional Performance cores, remains faster in multi-threaded workloads. This is expected, since the 255HX has a stronger core configuration. Still, the performance difference between the two does not appear to be massive, which could make the Core Ultra 7 251HX an attractive option in laptops where manufacturers want strong performance without pushing power and thermals too aggressively.
Intel’s Arrow Lake-HX lineup includes several high-end laptop processors, ranging from Core Ultra 5 models to Core Ultra 9 chips. The family includes configurations such as the Core Ultra 9 285HX and Core Ultra 9 275HX with 24 cores, Core Ultra 7 models with 20 cores, and the Core Ultra 7 251HX with 18 cores. The Core Ultra 5 245HX and Core Ultra 5 235HX sit lower in the stack with 14-core designs.
For buyers, the leaked Core Ultra 7 251HX results suggest that upcoming laptops powered by this chip could offer a strong balance of performance, efficiency, and thermal control. While peak benchmark numbers are always important, real-world laptop performance often depends heavily on how well a processor performs at practical power limits. In that area, the Core Ultra 7 251HX appears to be one of the more interesting chips in Intel’s new mobile lineup.
As always, leaked benchmark results should be treated with caution until more retail laptops are tested. Performance can vary based on cooling design, power settings, memory configuration, and manufacturer tuning. Still, if these early Cinebench R23 numbers are accurate, Intel’s Core Ultra 7 251HX could become a strong choice for high-performance laptops that need powerful multi-core performance without the extreme power draw of previous-generation flagship chips.
