convexhull

LDJ / using 165hz monitor in booting, FPS on monitor check is 72hz (and music is out of sync) I saw that some of people said try to lock frame to 60hz so I tried to turn on v-sync, it shows 60hz but fluctuating over 59~60.1hz (and also out of sync) When I run game on 60hz secondary monitor, it runs without any problem but want to run game on 165hz monitor since it is better is there any way to lock 60hz ingame or lock a monitor to 60hz in hardware?