Intel 18-Core CPU Beats 20-Core in Tests

According to recent reports, the Intel Core Ultra 7 251HX processor features a hybrid architecture consisting of 6 performance cores and 12 efficiency cores. Compared with the higher-tier 20-core variant in the same series, this configuration reduces only two efficiency cores while maintaining nearly identical specifications in key areas such as cache capacity, power characteristics, and turbo boost frequencies.

Based on PassMark benchmark data released on June 13, results from a limited sample set indicate that this 18-core processor delivers a 2% to 3% higher single-thread performance than the 20-core model, while also achieving a slight advantage in multi-threaded workloads. Industry analysts suggest that this improvement is largely attributed to refinements in Intel’s task scheduling algorithms. With fewer total cores, inter-core communication overhead is reduced, allowing for more efficient workload distribution and improved overall energy efficiency.

In early Cinebench benchmark evaluations, the Core Ultra 7 251HX has demonstrated performance levels comparable to previous-generation flagship Core i9 processors, while also showing noticeably better power efficiency under sustained loads.

However, it is important to note that PassMark has emphasized the relatively small number of current test samples and the resulting margin of error. As such, these early figures may not fully represent real-world performance in mass-produced systems.

Despite these limitations, the combined benchmark results suggest that the processor offers a strong performance-per-watt profile. On the adoption side, major notebook manufacturers such as Lenovo and MSI have already integrated this chip into their gaming laptop lineups, positioning it as a key option for mid-to-high performance notebooks in the second half of the year.