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Intel’s current Arrow Lake-HX lineup of mobile processors spans from the entry-level Core Ultra 5 235HX up to the flagship Ultra 9 285HX. Intel has recently added two more SKUs to this series bearing the “Plus” moniker. The Core Ultra 7 270HX Plus and Ultra 9 290HX Plus offer clock-speed improvements over their regular counterparts, rounding out Intel’s high-end mobile lineup.
However, Intel might be keeping a few secrets from us. Recently, an X (formerly Twitter) user @Huang514613 spotted the previously unseen Intel Core Ultra 7 251HX processor on the product pages of two laptops. The new SKU was spotted in the marketing material for the Lenovo Legion 5i 2026 and the MSI Raider 16HX laptops.
Surprisingly, the product page for the Lenovo Legion 5i 2026 bearing the unreleased chip is still up on Amazon. The Core Ultra 7 251HX is also shown to have a 55W TDP on the page. The technical specs on the page simply list “2.9 GHz intel_core_ultra_7” before the processor category. Interestingly, the same 2.9 GHz clock speed was also listed on the MSI product page, further adding to the uncertainty.
Currently, Intel has not officially acknowledged the existence of the Core Ultra 7 251HX. The closest comparison is the Core Ultra 7 255HX, which has 20 total cores (8P + 12E) and boosts to 5.2GHz on the P-Cores. However, its P-Core base clock is 2.4GHz, which is not in line with the 2.9GHz number we saw on the product pages.
If Intel follows the established nomenclature, the Ultra 7 251HX could be a lower-binned variant of the 255HX, with lower boost clocks but the same core layout. It could also be a variant of the 255HX with integrated graphics fused off to make it cheaper for people who use dedicated graphics cards anyway.
However, this leak should be taken with a grain of salt. It is entirely possible that an error was made on the product pages. There are also inconsistencies in the marketing material, such as the Lenovo laptop showing 32GB RAM in one place but 16GB RAM in another on the same page. Moreover, the Ultra 7 251HX does not align with Intel’s current numbering scheme within the Arrow-Lake HX lineup.
It will also be interesting to see how Intel integrates the Ultra 7 251HX into the existing lineup without overshadowing other SKUs.