Intel "Panther Lake" Frequencies Leak, 16-Core SKU Hits 5.1 GHz
In early November 2025, Intel's upcoming "Panther Lake" series of mobile processors surfaced in a new leak revealing their clock speeds and configurations. These processors are designed with up to 16 CPU cores divided into four Performance (P) cores, eight Efficiency (E) cores, and a four-core Low Power Efficiency (LPE) cluster.
"The top-tier Core Ultra X9 388H processor is expected to have a turbo boost frequency of up to 5.1 GHz," according to reliable Intel leaker @jaykihn0.
This is a notable jump in performance considering that the chip also integrates 12 Xe3 GPU cores, though their base clock speed is still not publicly known. Depending on the design and OEM configurations, the processors can operate within 65 W or 80 W thermal design power (TDP) envelopes. Standard PTH-H and PTL-U models are expected to remain within a 25 W TDP at stock frequencies.
Known "Panther Lake" SKUs and Specifications
- Core Ultra X9 388H: 4 P-Cores, 8 E-Cores, 4 LPE-Cores, up to 5.1 GHz
- Core Ultra 386H: 4 P-Cores, 8 E-Cores, 4 LPE-Cores, up to 4.9 GHz
- Core Ultra X7 368H: 4 P-Cores, 8 E-Cores, 4 LPE-Cores, up to 5.0 GHz
- Core Ultra 366H: 4 P-Cores, 8 E-Cores, 4 LPE-Cores, frequency TBD
These models continue Intel’s hybrid core approach, optimizing for both high performance and energy efficiency in mobile environments. The SKUs listed align with Intel’s previous naming scheme, where “X” denotes higher-end configurations.
Summary
Intel’s leaked “Panther Lake” CPU lineup reveals impressive 5.1 GHz boost speeds and hybrid 16-core designs optimized for performance and efficiency in next-gen mobile computing.