i'm running it on an aftermarket 1060 6gb
it's the worst card that still gives acceptable generation times, it is pretty slow though
rest of the rig is an old i5-2500K and 16gb of ddr3
takes ~2 minutes to generate a batch of 3 512x512 images at ~40-50 steps, depending on which sampling method i use
then another ~30 seconds to run the best one through the upscaler