Sonic Adventure 2 Battle Slowdown

[Sharkivore]

I've run this game on this Laptop before at almost always 100% 60FPS, besides the natural drops here and there. But now, the game will start, possibly run at 60 FPS, but more often it will run at about 30, then speed up to 60, then back down to 30. There's no real indication to what causes it, as it'll happen at any point- A level, cutscene, and even when idling on the title screen. Please help?

[Helios]

Turn off vsync if you have it on

[Sharkivore]

Turn off vsync if you have it on

It's not on.

[Helios]

Your drivers may be forcing it on.

Flipping from 60 to 30 and back consistently is a sign of vsync issues.