Ah i forgot they updated the name of that setting, sorry mate. Check in both.
I worry for laptop series cards because they often have dramas with CPU gfx, which a lot come with. Damn intel trying to get into the GPU market....
My brother has my old 7970 Lightning, he had some issues with frame rate and display, first due to in game vsync so we disabled that and got borderless and then because of screensaver believe it or not. So power settings might have some sway with these AMD cards. Atm we are trying to work out why he has extremely long load screens at start of game, I can boot and load into game in 10sec, his initial boot takes up to 3 minutes thus far
I'm unable to find anything about vsync or presentinterval whatsoever in any of my .ini files for SSE. I've looked in each of them and found nothing close. Not sure why it's not there either. I've got my power options set to high performance since the laptop is plugged in. My first impression is that the problem is a refresh rate issue, but I could be really wrong about this.