It isn't your cable. Your best best is to make sure AMP is off (shouldn't be on when gaming anyway even besides input lag. Even if you like motion smoothing it is bad for gaming since unlike movies/tv where it has exact frames to use for the frame creation process games render live and cause artifacting errors) and make sure any processing under advanced picture controls is off. Stuff like DNR, mosquito noise, and so on.
Sent from my SM-G930V using Tapatalk