Please, share your results as I'm eager to see what's the overall result of some minor researchs.
Was a merge and test I'd been trying using a simple 8GB VRam card, so I dont mind the results I had so far, this can be helpful for those who dont have enough power with a graphic card to use XL stuff or models without xFormers.
I can suggest using lower res as 768x512 and using TiledVae + 4x_foolhardy_Remacri hirex fix you can have pretty nice results investing a min or two, here's an example of my preferred settings for getting highres images with a 8Gb Vram card:
For other UpScaling suggestions, check this article from capybara_paws
[UPDATED] Comparing 4 popular upscalers in the SD Upscale | Civitai