The green square issue has been well known, particularly on AMD cards, and I believe the solution is... full precision :c But idk, I haven't had that issue. My issue's that I can run it in <4GB VRAM, but can only do a couple dozen images before some memory leak or smth drives it out of memory (effects my 2070S too, but only after many more images). Restarting it isn't too bad, but it's enough to have me looking to using either if two AMD APU's that I have on hand.