Appearing on Geekbench is the Core Ultra 7 366H, sporting specifications of 4 performance cores, 8 efficiency cores, and 4 low-power efficiency cores, totaling 16 cores. It also includes 18MB of L3 cache, a base frequency of 2.0 GHz, and a maximum boost frequency of 4.8 GHz. The architecture aligns with previous engineering samples, indicating this batch is nearing mass production in terms of frequency and voltage specifications. Notably, it can sustain short bursts at 4.8 GHz with a default power draw of 25W, suggesting it belongs to a mid-to-high bin level with an ideal leakage and voltage profile. Such a profile is crucial to pass thermal certifications for H-grade mobile devices.

The integrated graphics feature 4 Xe3 cores, representing the base GPU configuration in the Panther Lake series. The Vulkan score of 22,813 is comparable to the GTX 1050 Ti Mobile's 21,937, approximately 26% higher than the Radeon 840M, yet falls short of the 860M's 37,552. Achieving performance akin to the 1050 Ti necessitates pushing 4 Xe3 cores to their limits in terms of frequency and cache usage. This technique, common in low EU count SKUs, compensates for limited parallelism by enhancing the workload on each processing unit. Thus, crystal quality must adhere to strict standards, reinforcing its bin classification.

The 4-core Xe3 configuration isn't designed for intensive graphics requirements. Instead, it aims to meet the minimal GPU needs of systems without discrete graphics, maintaining essential 3D performance through brief high-frequency bursts, with passive down-throttling under prolonged stress due to the 25W power restriction. Compared with the 8-core 860M, differences in texture and raster capabilities are evident in scoring, without any architectural workarounds.

Panther Lake's 10-core and 12-core Xe3 have been benchmarked in 3DMark Time Spy, achieving scores similar to the RTX 3050. These models boast a more complete GPU design with higher wafer efficiency and power demands than their 4-core counterparts. Intel segments its GPU offerings by naturally partitioning based on die yields: lower EU counts often stem from edge-cut or partially defective tiles, with reduced cores for enhanced wafer output efficiency and tailored frequency strategies to establish distinct models.

Information from leaked SKU lists shows that the Panther Lake-H lineup predominantly utilizes the 4P + 8E + 4 LP-E configuration, primarily differing by GPU core count and RW frequency. The U series further pares down E cores, reducing GPUs to 2 to 4 cores. The extensive structural reuse signifies a finalized design, enabling diverse product offerings through strategic binning in subsequent stages.

The Core Ultra 7 366H’s performance reveals that under processing, voltage, and power limitations, the 4-core Xe3 consistently achieves GTX 1050 Ti-level performance. On a 25W platform, this represents the pinnacle of iGPU capabilities for lightweight 3D tasks in systems that bypass discrete GPUs, providing OEMs with an actionable baseline for models without separate graphics solutions.