This is a simple crude workflow I did so I could use FLUX on my pc without having to wait 20 minutes (or more if upscaled) for each image generation.

So, I decided using the Schnell version, then load an SDXL model to upscale and, if needed, apply face detailer.

*If you run into an allocation error when using the face detailer, just close the message and hit "Queue Prompt" again (that's why I like to use fixed seeds).

My PC:

i5-12400F

RTX 3060 12Gb VRAM

32Gb RAM

Hope this helps someone.