Feature request: Intel Arc B390 / Panther Lake iGPU support on Windows (64 GB shared RAM) #515

Feature request

Please consider support for the Intel Arc B390 integrated GPU (Core Ultra X9 388H / Panther Lake) on Windows, using a SYCL/Level Zero or Vulkan backend.

I found the earlier Intel Arc request in #299 and the ongoing SYCL port in #423. This request is specifically for the B390 integrated GPU with shared system memory on Windows, rather than the Arc Pro B70 discrete GPU on Ubuntu used to validate that port.

Hardware and software

• Laptop: MSI Prestige 16 Flip AI+ C3MTG
• CPU: Intel Core Ultra X9 388H, 16 cores / 16 threads
• GPU: Intel Arc B390, integrated; no NVIDIA or AMD GPU detected
• RAM: 64 GB installed (63.5 GiB visible to Windows), reported at 8533 MT/s
• OS: Windows 11 Pro, version 10.0.26200
• Intel graphics driver: 32.0.101.8991
• Storage: Micron 2500 NVMe SSD
• Strata version reviewed: v0.1.36 / current main

Current limitation and checks performed

The current setup only accepts --backend cuda or --backend hip, so this hardware has no supported installation path.

The local Vulkan stack successfully enumerates:

deviceType = PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU
deviceName = Intel(R) Arc(TM) B390 GPU
driverInfo = 101.8991

LM Studio's installed llama.cpp Vulkan runtime (2.29.1) also lists the B390 as an available device. These were device-enumeration checks only, not successful Strata inference tests; I have not installed or benchmarked Strata on this machine.

Requested support

1. A native Windows installation/build path for Intel B390, potentially extending the SYCL work in INTEL B70 32gb support #423.
2. Detection and allocation planning for integrated/shared-memory GPUs: CPU RAM and GPU memory share the same physical pool and should not be counted as independent capacities.
3. Conservative model/context recommendations for a 64 GB system, with clear errors when a requested allocation cannot fit.

An experimental text-only path would already be useful; image input and performance parity with discrete GPUs are not prerequisites.

Is B390 / Panther Lake support feasible through the existing SYCL port, and what additional device information or kernel checks would be needed to evaluate it?

Thank you for building Strata.