Intel Panther Lake: A Return to Form
Testing the flagship Intel Core Ultra X9 388H inside the 2026 Asus Zenbook Duo reveals a processor that finally delivers on the promise of Intel’s 18A manufacturing process. After relying on TSMC for previous successes, Intel has successfully brought core silicon production back in-house with this high-performance mobile chip.
The Core Ultra X9 388H handles intensive multitasking and 1080p gaming at high settings with ease, all while maintaining battery life that stretches well beyond a standard workday. This performance marks a significant departure from the mixed reception of the Arrow Lake desktop chips and the TSMC-dependent design of the Lunar Lake series. By utilizing the 18A process, Intel aims to prove its foundries can compete with the industry standards set by TSMC.
This 16-core model features a sophisticated architecture combining Cougar Cove performance cores and Darkmont efficiency cores. The integrated Intel Arc B390 GPU, equipped with 12 Xe graphics cores, supports the chip’s versatility. With a base power of 25W that scales to a maximum turbo of 80W, the Panther Lake platform offers a balance of thermal efficiency and raw power, signaling a genuine recovery for Intel’s x86 mobile lineup.
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