Intel Panther Lake “Core Ultra Series 3” CPU Specifications Leaked: Top SKU Reaches 5.1 GHz

Recent leaks have unveiled the anticipated clock speeds for Intel’s Panther Lake “Core Ultra Series 3″CPUs, suggesting top frequencies may reach an impressive 5.1 GHz.

Intel Unveils 14 Panther Lake “Core Ultra Series 3″CPU WeUs with Up to 5.1 GHz Frequencies, 16 Cores, and 12 Xe3 iGPU Cores

According to insider information from @jaykihn0, the Intel Panther Lake “Core Ultra Series 3″will comprise 14 CPU WeUs categorized into four distinct segments. These will encompass high-performance configurations with varied core setups, including:

4+8+4 WeUs : Incorporating 12 Xe3 iGPU cores
4+4+4 WeUs: Featuring 10 Xe3 iGPU cores
4+0+4 WeUs: Tailored for mainstream users
2+0+4 WeUs: Designed for entry-level applications

4+8+4388H 5.1386H 4.9368H 5.0366H 4.8358H 4.8356H 4.74+4+4338H 4.7336H 4.64+0+4365 4.8355 4.7335 4.6325 4.52+0+4332 4.4322 4.4

— Jaykihn (@jaykihn0) November 5, 2025

Kicking off the lineup is the Intel Core Ultra X9 388H, the flagship WeU. This model will embrace the full die architecture, including 4 Cougar Cove Performance (P) cores, 8 Darkmont Efficient (E) cores, and 4 Darkmont Low Power (LP-E) cores. With maximum clock speeds hitting 5.1 GHz and an integrated GPU boasting 12 Xe3 cores—most likely designated as the Arc B390, featuring clock speeds between 2.5 GHz and 3.0 GHz—this CPU is positioned for high-end applications. Other WeUs like the 386H, 368H, 366H, 358H, and 356H will share the same die, albeit with varied clock speeds.

Moving on, the two 4+4+4 WeUs—Core Ultra 5 338H and Core Ultra 5 336H—will include the Arc B370 GPU with 10 Xe3 iGPU cores, delivering clock speeds of 4.7 GHz and 4.6 GHz, respectively. Following this segment, the Non-H WeUs with a 4+0+4 structure will be geared towards mainstream functionality. This category includes four models—Core Ultra 365, 355, 335, and 325—all likely equipped with the 4 Xe3 iGPU and offering clock speeds reaching 4.8 GHz.

Lastly, the entry-level “U-Series”will introduce two CPUs: the 332 and 322, both operating at 4.4 GHz. These models, based on a 2+0+4 configuration, will be optimized for power with a consumption range of 15-28W.

Panther Lake features Intel Xe3 GPU, 16 CPU cores, 96GB LPDDR5, Integrated Thunderbolt 4, and Enhanced Intel Thread Director. — Image Source: Intel

Intel’s Core Ultra Series 3 “Panther Lake”lineup is set for an official debut at CES 2026, with consumer availability anticipated for January 2026. Additionally, one WeU is poised for release later this year to power premium devices, making it essential for tech enthusiasts to stay updated for forthcoming details.

Preliminary Intel Panther Lake-H and U Lineup Overview

CPU Model	P-Cores (Cougar Cove)	E-Cores (Darkmont)	LP-E Cores (Skymont)	CPU Clocks	Xe3 iGPU Cores	iGPU Clock	TDP
Core Ultra X9 388H	4	8	4	TBD	12	TBD	45W
Core Ultra X7 368H	4	8	4	TBD	12	TBD	45W
Core Ultra X7 358H	4	8	4	1.9 / 4.8 GHz?	12	2500 MHz	45W
Core Ultra 5 338H	4	4	4	1.9 / 4.7 GHz?	10	TBD	45W
Core Ultra 9 375H	4	8	4	TBD	4	TBD	45W
Core Ultra 7 355H	4	8	4	TBD	4	TBD	45W
Core Ultra 7 345H	4	8	4	TBD	4	TBD	45W
Core Ultra 5 325H	4	4	4	TBD	4	TBD	45W
Core Ultra 7 360U	4	0	4	TBD	4	TBD	15-28W
Core Ultra 5 350U	4	0	4	TBD	4	TBD	15-28W
Core Ultra 5 340U	4	0	4	TBD	4	TBD	15-28W
Core Ultra 3 320U	2	0	4	TBD	4	TBD	15-28W