A collection of GGUF for Illustrious models just to help low memory people and do some experiences:
RealPhotoIL - https://civarchive.com/models/2041366
PerfectDeliberate - https://civarchive.com/models/24350
WAI-illustrious-SDXL - https://civarchive.com/models/827184
SmoothMix - https://civarchive.com/models/1695253
Hassaku - https://civarchive.com/models/140272
Holly Mix - https://civarchive.com/models/959490
Prefect illustrious - https://civarchive.com/models/1224788
Nova Orange - https://civarchive.com/models/967405
Animagine - https://civarchive.com/models/260267
Nova Anime - https://civarchive.com/models/376130
One obsession Branch - https://civarchive.com/models/1368727
Nova Furry - https://civarchive.com/models/503815
The rest of the GGUFs versions are in my huggingface - https://huggingface.co/BigDannyPt/Illustrious-GGUF-Collection, not going to upload since it takes a lot for it in CivitAI
What I noticed is that Q6 or lower, will increase the s/it to double, not sure why...
If you have a specific model that you want the conversion, you can ask that I'll try to do it