Originally Posted by The Mac
no, it is not.
vsync CANNOT exibit the behavior the OP is describing.
his frame rates are capped/limited.
NOTHING about the OPs post sugests vsync.
I haven't seen the behavior you're calling vsync in a long time then. Before adaptive vsync every instance where I used it in a demanding game it would snap down to 40, 30, 20 fps. If that's called dynamic vsync it's the nvidia default and has been for 6 years at least. Can't say for AMD.