machala Yeah i think this plays a part in the eye strain especially since theres a difference in general image quality from switching from a K4200 to a A4000. I can try writing there but i doubt they will take it seriously unless enough people join in and complain.
HAL9000 The exact revision is "GA104-875-A1" and it seems closest to the RTX 3070 TI(GA104-400-A1) and the RTX 3070 TI 16GB which never was actually released, I wonder if all GA104 based GPU's will cause the same symptoms or if moving up to a GA102(RTX 3080, 3090, A5000) based GPU would be any better. It was reported here that a RTX 3090 gave @screengazer eyestrain so it seems like maybe the GA102 series will cause the same symptoms. https://ledstrain.org/d/1048-new-graphics-card-rtx-3090-gives-eyestrain
It sounds like you have similar experience with your 3060 Ti as im having with my A4000, i tried raising the sharpness in the control panel and it helped a very small about amount but still not usable for me.
I have a RTX 4000 based on the TU104 GPU arriving soon which comes with Samsung VRAM, i really hope it will be free of eyestrain. If that fails ill try a RTX 5000 after that and see what happens. The 5700 XT's ive tried have been the worst so far though.