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

[louisv]

From this thread, it is obvious that the NVidia series 5 (590, 580 and one 570) is currently a problem with CoD.

[badfinger]

Originally Posted by louisv

From this thread, it is obvious that the NVidia series 5 (590, 580 and one 570) is currently a problem with CoD.

Not so obvious to some. I'm not a computer expert, nor an expert on WWII aircraft performance. But, my system is running fine, my FPS is up, I see improvements with each patch, and am happily flying around "shooting down what's up and blowing up what's down."

I am also not bothered about things like fuzzy horizons, a wrong font, or the sunset being the wrong shade of red.

See specs below.

binky9

[mikec5airguard]

I dunno if its limited to nvidia, I think I have an OK sytem, and the framerate is all over the place, from 110 to 20's in black death track.

[TonyD]

Originally Posted by Al Capwn

...

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

Thanks for that, but I do not have a problem understanding the theory, merely the affect. As I said, I have never seen frame rates being limited to dividers of the refresh rate with VSYNC enabled, but this may be due to the games in which I use it (some have apparently included a form of adaptive VSYNC for some time). In CloD it appears to function as a frame limiter, loosely enforcing an upper limit but allowing normal fluctuation at lower rates.

A new race simulator (rFactor 2) has a choice of 4 different methods of implementing the option, which should suit most tastes, but from what I’ve seen this is somewhat unusual. I have no idea which method CloD may use, but it does eliminate the tearing that becomes apparent when turning my head around rapidly in the cockpit without influencing frame rates that are less than my monitor’s refresh rate. A log of frame rates using MSI AfterBurner, both with and without VSYNC enabled, only shows a difference in rates above the imposed maximum value.