How does the choice of Operating System affect image generation performance in Stable Diffusion?

How does the choice of Operating System affect image generation performance in Stable Diffusion?
How does performance compare across a variety of consumer-grade GPUs in regard to SDXL LoRA training?
How does performance compare across a variety of professional-grade GPUs in regard to SDXL LoRA training?
NVIDIA has released a TensorRT extension for Stable Diffusion using Automatic 1111, promising significant performance gains. But does it work as advertised?
The Intel Arc Alchemist A770 and A750 launched 11 months ago. How have the Intel Arc A770 and A750 improved for content creation applications since then?
Installing add-in cards—like capture cards—can limit PCI-e bandwidth to the GPU. Does the reduction of PCI-e bandwidth harm performance in content-creation?
Stable Diffusion is seeing more use for professional content creation work. How do NVIDIA RTX and Radeon PRO cards compare in this workflow?
Stable Diffusion is seeing more use for professional content creation work. How do NVIDIA GeForce and AMD Radeon cards compare in this workflow?