I am satisfied in the 40's over-all and have trouble deciphering anything above 40-45 -- been like this since 1996. Tried guessing frame-rate over 40 -- always way off. Decided to run frame limiters to see where smooth frame-rate was for me and it was 40-45. Even will settle for less performance for sustained minimums if the gaming experience, immersion bar is raised. There is no absolute truth for all just subjective truth based on taste and tolerance for each individual.