Artifacts in all previews / renders besides cycles

i got all these. everywhere… on all my files. it didnt use to be like this but idk what changed since it started happening or when…


please help? im sorry if this was already posted but i havent found working solution :x its really annoying i cant use cycles all the time for previews…
file:
scyt.blend (2.5 MB)
EDIT: ooops it was caused by camera clipping… i just tried to change it to the opposite direction so ooops…