izac3dHow I can lockdown framerate in nvidia cp ?
Open up the control panel then click on Manage 3D Settings, then click the Program Settings tab. Under "Select a program to optimize" look for and select GTA V. Then below it find "vertical sync" and click the box next it that says "Use global settings". Change that to "On".
Another possible fix that someone posted on the Nvidia forums is to change the options in this image (it's the same place where you change the vertical sync settings above):