Several Intel Panther Lake "Core Ultra Series 3" CPUs have been leaked and benchmarked within the PassMark Software suite.
Intel Core Ultra Series 3 "Panther Lake" CPUs Leak Shows Various SKU Benchmarks, Strong ST Scores
Not one, not two, but four Intel Panther Lake "Core Ultra Series 3" CPUs have leaked within the PassMark benchmark suite. These SKUs include the Core Ultra 7 366H, Ultra X7 358H, Ultra 7 365, and Ultra 5 332. It confirms not only the specs but also the preliminary performance capabilities that these chips offer.
Starting with the specifications, the Intel Core Ultra 7 366H features 16 cores with 18 MB of L3 cache and 12 MB of L2 cache. The Core Ultra X7 358H features the same core configuration but with a 4.8 GHz clock (boost), and should also feature the full 12 Xe3 iGPU. The Core Ultra 7 365 features 8 cores (4+0+4) with 12 MB of L3 and 12 MB of L2 cache, while the Core Ultra 5 332 features 6 cores (2+0+2) with 12 MB of L3 and 6 MB of L2 cache.
In terms of performance, the Intel Core Ultra X7 366H features similar performance as the Core Ultra 9 285H, which has a higher clock speed of up to 5.40 GHz, while the 366H should be around 5.0 GHz, so a big difference. The Core Ultra X7 358H with a 4.8 GHz clock is faster than the Core Ultra 7 255H, which has a 300 MHz clock speed advantage and comes with extra P-Cores.
The lower-end Core Ultra 7 365 is an 8-core part which should be compared to similar 8-core Ryzen and Lunar Lake offerings. This chip ends up faster than both the Ryzen AI Z2 Extreme and the Ultra 5 226V. As for the most entry-level SKU, the 6-core "Core Ultra 5 332", this is slower than all other SKUs.
PassMark CPU (Higher is Better)
In addition to these, the first Panther Lake handheld has also been leaked in Geekbench. This is the OneXPlayer X1 i with the Intel Core Ultra 5 338H CPU. The chip packs 12 cores and clocks up to 4.6 GHz.
We can compare this directly to the OneXPlayer X1 Pro, which we reviewed here. The handheld we tested was using the Ryzen AI 9 HX 370, the fastest Strix Point APU. The single-core score is much lower than the AMD handheld but the multi-threading score is higher.
Geekbench 6 (Higher is Better)
The one thing that you should keep in mind is that these benchmarks don't tell what exact clock speeds the chips were running at, nor do they tell much about the platforms (power profiles, memory, TDPs, etc).
One should note that these are still preliminary performance figures, and final results would vary. Intel is all set to unveil its Core Ultra Series 3 "Panther Lake" CPUs at CES 2026, so be prepared for a loaded CPU launch.
Intel Core Ultra Series 3 CPU Lineup Specs (Official):
| CPU Model | P-Cores (Cougar Cove) | E-Cores (Darkmont) | LP-E Cores (Skymont) | CPU Clocks (Max) | Xe3 iGPU Cores | TDP (Base / MTP) |
|---|---|---|---|---|---|---|
| Core Ultra X9 388H | 4 | 8 | 4 | 5.1 GHz | 12 @ 2.50 GHz | 25-80W |
| Core Ultra 9 386H | 4 | 8 | 4 | 4.9 GHz | 4 @ 2.50 GHz | 25-80W |
| Core Ultra X7 368H | 4 | 8 | 4 | 5.0 GHz | 12 @ 2.50 GHz | 25-80W |
| Core Ultra 7 366H | 4 | 8 | 4 | 4.8 GHz | 4 @ 2.50 GHz | 25-80W |
| Core Ultra 7 365 | 4 | 0 | 4 | 4.8 GHz | 4 @ 2.50 GHz | 25-55W |
| Core Ultra X7 358H | 4 | 8 | 4 | 4.8 GHz | 12 @ 2.50 GHz | 25-80W |
| Core Ultra 7 356H | 4 | 8 | 4 | 4.7 GHz | 4 @ 2.45 GHz | 25-80W |
| Core Ultra 7 355H | 4 | 0 | 4 | 4.7 GHz | 4 @ 2.50 GHz | 25-55W |
| Core Ultra 5 338H | 4 | 4 | 4 | 4.7 GHz | 10 @ 2.40 GHz | 25-80W |
| Core Ultra 5 336H | 4 | 4 | 4 | 4.6 GHz | 4 @ 2.30 GHz | 25-80W |
| Core Ultra 5 335 | 4 | 0 | 4 | 4.6 GHz | 4 @ 2.45 GHz | 25-55W |
| Core Ultra 5 332 | 2 | 0 | 4 | 4.4 GHz | 2 @ 2.30 GHz | 25-55W |
| Core Ultra 5 325 | 4 | 0 | 4 | 4.5 GHz | 4 @ 2.45 GHz | 25-55W |
| Core Ultra 5 322 | 2 | 0 | 4 | 4.4 GHz | 2 @ 2.30 GHz | 25-55W |
News Sources: Momomo_US , @x86deadandback , @Olrak29_
About the author: A Software Engineer by training and a PC enthusiast by passion, Hassan Mujtaba serves as Wccftech's Senior Editor for hardware section. With years of experience in the industry, he specializes in deep-dive technical analysis of next-generation CPU and GPU architectures, motherboards, and cooling solutions. His work involves not only breaking news on upcoming technologies but also extensive hands-on reviews and benchmarking.
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