Intel “Panther Lake” Frequencies Leak: 16-Core SKU Reaches 5.1 GHz
In early November 2025, new details emerged about Intel’s upcoming “Panther Lake” line of mobile processors, which boast configurations with up to 16 CPU cores divided into four P-Cores, eight E-Cores, and an additional low-power four-core LPE cluster.
Leaker @jaykihn0 shared new information on the expected clock speeds for these processors. The flagship Core Ultra X9 388H is said to reach a turbo boost frequency of up to 5.1 GHz. Given the processor’s 16 CPU cores and 12 Xe3 GPU cores (whose clock speeds are still unknown), this is a notable achievement.
Depending on OEM implementation, the high-end models can operate within a thermal design power (TDP) range of 65 W to 80 W, while stock configurations for both PTH-H and PTL-U variants are expected to stay within 25 W TDP.
Available SKUs and Estimated 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, up to 4.X GHz (exact value pending)
“These specifications align with Intel’s continued effort to balance performance and efficiency in mobile computing,” commented TechPowerUp’s AleksandarK.
Power and Class Designations
The use of design labels such as X9, X7, and X5 mirrors Intel’s existing Core Ultra 9/7/5 series, helping to position each SKU within Intel’s broader lineup of mobile CPUs.
Author’s summary: Intel’s “Panther Lake” mobile CPUs introduce a 16-core design with the Core Ultra X9 388H hitting 5.1 GHz, emphasizing a strong balance between performance and power efficiency.