VSync: control panel vs wglSwapIntervalEXT

I’m getting slower/inconsistent framerates using wglSwapIntervalEXT rather than turning vsync on in the display properties, using nvidia drivers.
Anyone else experienced this? Or need I look deeper into my own code for the answer?

I’m getting 2.5 fps less when i use nv control panel but can be tolerance


Can’t say I’ve even looked at this (I’ll try it on the w’end).

Some obvious questions though…

  1. What version drivers?

  2. Do you call wglSwapIntervalEXT just once?

  1. 43.45
  2. Yes, just once.