Declining FPS on core i7

[Al Capwn]

Originally Posted by TonyD

I have never come across this in all my years of gaming and multiple Ati gfx cards – is this something peculiar to nVidia? Using VSYNC in every game I have limits the upper frame rate to the screen’s refresh rate, but does absolutely nothing to lower frame rates. I have always used it to limit frame rates this way and avoid ‘tearing’, and still do. It works this way for me in CloD currently.

The way vsync functions causes the loss in framerate (triple buffering is a nice technique to help solve some of the issues). However this loss in framerate only occurs when your framerate drops below your refresh rate. nVidia recently has released their own iteration called 'adaptive v-sync' that aims to correct the issue with vsync cutting framerates down when under your refresh rate, and to not have input delay when at/over your refresh rate.

For a nice explanation of how v-sync actually works and why there is a performance decrease I would recommend to take a look at this nice little blurb from the Hardocp forums,

http://hardforum.com/showthread.php?t=928593

I hope this sheds some light on the mysteries of v-sync