An upcoming Intel Panther Lake "Core Ultra Series 3" ES CPU has been pictured and tested, revealing some new interesting details.
Intel's 10-Core Panther Lake ES CPU Pictured With 16 GB LPDDR5x Memory, Tested With Up To 65W PL2 Rating
Intel is all set to launch the first Panther Lake "Core Ultra Series 3" SKU later this year, and an official launch is expected at CES 2026. While we wait for that, we have seen the lineup and performance of several SKUs leak out.
Today, we have some new pictures and tests published by longtime Twitter/X fellow, YuuKi_AnS, who has shared an engineering Panther Lake sample. This sample is early silicon that leverages the PTL 16C/4Xe3 die configuration. There are four tiles and a filler tile on the SoC, and the package is based around a BGA 2540 socket configuration. The specific CPU has a "000C06C0" device ID.
The test platform was the Intel RVP (Reference Evaluation Platform), which we got a hands-on for during the Intel Tech Tour 2025. This platform supports both LPCAMM2 and standard LPDDR5x memory configs. For the ES sample, there is 16 GB of LPDDR5X memory, which is assembled using an ADL-P "Alder Lake" frame. These are four SK hynix "H58G56BK8BX068-418A" DRAM modules with a rated speed of 7467MHz.
This is lower than the 9600 MT/s that the Panther Lake "Core Ultra Series 3" platform will offer. We have already seen manufacturers evaluating over 10 GT/s speeds with Panther Lake, so the ES platform running lower memory speeds is expected.
Now coming to the CPU specs, this Intel Panther Lake ES CPU features a total of 10 cores arranged in a 2 P-Core, 4 E-Core, and 4 LP-E core configuration. The CPU features 11 MB of L2 cache and 12 MB of L3 cache. Clock speeds are maintained at 3.0 GHz base, 3.2 GHz boost, and the 4 Xe3 iGPU cores share a 2.5 GT/s PCIe link.
The "Core Ultra 3 3X5H" chip is based on the "A0" stepping, and is a 25W "Panther Lake-H" SKU. 25W is the PL1 rating with PL2 being set at 65W and PL4 set at 160W. The chip has a Tj Max of 100 °C. The P-Cores clock up to 3.0 GHz across all-cores, while the E-Cores clock up to 2.6 GHz across 4 cores.
The CPU was also tested in CPU-Z ST/MT benchmarks, but given its ES nature, the results aren't that good.
Based on the recent Panther Lake lineup leak, none of the SKU offers a total of 10 cores in such a config so this should just be an internal testing chip. If not, we might see it as a Core Ultra 5 or Core Ultra 3 SKU.
Intel Panther Lake-H and U lineup (Preliminary)
| CPU Model | P-Cores (Cougar Cove) | E-Cores (Darkmont) | LP-E Cores (Skymont) | CPU Clocks (Max) | Xe3 iGPU Cores | iGPU Clock | TDP |
|---|---|---|---|---|---|---|---|
| Core Ultra X9 388H | 4 | 8 | 4 | 5.1 GHz | 12 (B390) | TBD | 25W (65-80W Turbo) |
| Core Ultra X9 386H | 4 | 8 | 4 | 4.9 GHz | 4 | TBD | 25W (65-80W Turbo) |
| Core Ultra X7 368H | 4 | 8 | 4 | 5.0 GHz | 12 (B390) | TBD | 25W (65-80W Turbo) |
| Core Ultra X7 366H | 4 | 8 | 4 | 4.8 GHz | 4 | TBD | 25W (65-80W Turbo) |
| Core Ultra X7 358H | 4 | 8 | 4 | 4.8 GHz | 12 (B390) | 2500 MHz | 25W (65-80W Turbo) |
| Core Ultra X7 356H | 4 | 8 | 4 | 4.7 GHz | 4 | TBD | 25W (65-80W Turbo) |
| Core Ultra 5 338H | 4 | 4 | 4 | 4.7 GHz | 10 (B370) | TBD | 25W (65-80W Turbo) |
| Core Ultra 5 336H | 4 | 4 | 4 | 4.6 GHz | 4 | TBD | 25W (65-80W Turbo) |
| Core Ultra 7 365 | 4 | 0 | 4 | 4.8 GHz | 4 | TBD | 25W (55W Turbo) |
| Core Ultra 7 355 | 4 | 0 | 4 | 4.7 GHz | 4 | TBD | 25W (55W Turbo) |
| Core Ultra 5 335 | 4 | 0 | 4 | 4.6 GHz | 4 | TBD | 25W (55W Turbo) |
| Core Ultra 5 325 | 4 | 0 | 4 | 4.5 GHz | 4 | TBD | 25W (55W Turbo) |
| Core Ultra 5 332 | 2 | 0 | 4 | 4.4 GHz | 2 | TBD | 25W (55W Turbo) |
| Core Ultra 5 322 | 2 | 0 | 4 | 4.4 GHz | 2 | TBD | 25W (55W Turbo) |
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