VSync: control panel vs wglSwapIntervalEXT

[knackered]

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?

[Luminous Blue]

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

LB

[rgpc]

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?

[knackered]

1. 43.45
2. Yes, just once.