Framerate issues

[Ranebow]

turn off your bloody vsync

Vsync will not be the culprit here. Inherently Vsync is never the culprit, it's often the program or the drivers in how it treats frame buffering. Additionally, he could be using Adaptive syncing OR he may be using frame limiting e.g. 58fps/60hz. Regardless, he'd still get the same performance problems.