artifacts on rx 470

hi guys, i got some rx 470s, and while i was waiting for other things to arrive to build a miner, i was using one of the rx 470 to play games. and turns out it has artifacts (while playing games)

even if it doesnt affect mining or show no memory errors on hw info, should i still rma it due to artifacts? i mean their use will be mining, and maybe at this momento it doesnt affect mining but might affect it in the future if its already showing artifacts?

thanks