A quick update that with the most recent Bluefin GTS update (Kernel 6.16.7-100.fc41.x86_64), the heat/noise issue with my HX 370 is fully resolved. Idle temps are b/w 38c and 42c and wattage hovers b/w 3w and 4w (values as reported by btop).
On the AI front, with ROCm 6.4.4+, AMD has expanded (preview) support for PyTorch on Ryzen APUs. I can fully utilize the iGPU for local AI workloads using LM Studio, getting 20-23 tok/sec (impressive!) using the openai/gpt-oss-20b model (this is through Vulkan as Bluefin GTS ships with ROCm 6.2).
Once full ROCm support lands, the perf should improve even more. At this point, I’m thoroughly impressed with the power & efficiency of the Ryzen AI HX 370 APU!
For more details, please review this comment (and follow through to the end for a boatload of valuable AI-related info with respect to the HX 370 APU).