
Intel Panther Lake X9 388H: A leap in mobile CPU performance and efficiency
Notebookcheck tests Intel’s Panther Lake Core Ultra X9 388H and finds it outperforms Arrow Lake and Zen 5 in both single-core efficiency at low power (approximately 13–15 W total package) and multi-core performance across 20–45 W, while remaining competitive with Apple’s M5 for multi-core work. Panther Lake consolidates the previous Arrow Lake and Lunar Lake generations, delivering strong performance in slim laptops with lower power envelopes and offering a compelling option for 2026 handhelds and thin notebooks.



