Yesterday i was at my friend who owns asus 1080ti and samsung S24E370D, we were messing a bit with his hardware, testing various games and so on. By default, as he is using geforce gpu we had freesync disabled on his screen but in order to enable higher refreshrate (default, without freesync, is 60Hz) i enabled freesync ultimate engine which unlocks 75Hz. When monitor was still on default setting i've launched ac black flag and seen a lot of tearing but after enabling freesync i had impression, which somehow might be wrong but i'm almost sure, tearing was gone and vsync was not enabled. Maybe nvidia in drivers use other methods of sync to make it compatible with freesync. Monitor and gpu are connected via display port cable so maybe that's dp's standard adaptive sync.