I recently bought a PG258Q Asus monitor. It supports 240hz, and I set dektop refresh rate to this value. It works perfectly until I launch CS:GO. Using mat_info, I'm told that CS:GO is still running 144hz (Display mode : 1024 x 768 @144hz (BGRX8888)). VSYNC is off, -freq 240 is in launch options. Why won't 240hz work with CS:GO?