Hi, I´ve disvovered something very strange with my FPS. When I have the FPS locked on some suitable value, I get always lower FPS than I set it to unlimited.A quick example: Locked: ~ 20 FPS; Unlimited: ~30-40 FPS.That´s somehow strange. Does anyone have an idea, why this is so? Do you have the same or it is related to my system?

Hi, I´ve disvovered something very strange with my FPS. When I have the FPS locked on some suitable value, I get always lower FPS than I set it to unlimited.A quick example: Locked: ~ 20 FPS; Unlimited: ~30-40 FPS.That´s somehow strange. Does anyone have an idea, why this is so? Do you have the same or it is related to my system?

This is common behavior and is the reason why many people run unlimited frames in FSX in conjunction with an external FPS limiter. The advantage of limited frames in my experience is glass smooth terrain movement, but the fps penalty can be quite severe. When I run unlimited frames in FSX with the external FPS limiter set to 30 I get higher average FPS but I do notice very slight stuttering in th movement of the terrain below the aircraft.

FS in unlimited mode will attempt a framerate based upon what the believes it can render. in general you end up with sudden 'spikes' up and down as you fly over different scenery details and enter/exit clouds. this is 'normal' and how FS works.it is generally agreed that the 'unlimited' setting is best for FSX. the 'limited' setting can actually make stutters and other issues worse ... many call this a 'bug' with the 'limited' code.the work around is to set FSX to 'unlimited' and use an external 'frame rate limter'. you can search this forum for 'frame rate limiter 0.2' for posts such as this -http://forum.avsim.net/topic/270347-frame-rate-limiter/--

I know that I should use an external limiter. I´ve tried it, but is didn´t work as it should. I locked the frames to 30 but they were completly different with the external limiter.

Do you have more than 1 monitor? If so, you need to do 2x or 3x of the framerate you want, for it to actually set cap it to desired value. For example, if you set external limiter to 30 fps, and have 2 monitors, it will cap it to 15 fps per monitor, so you would need to have it at 60 to make it cap it at 30 fps.

No, I have only one little, neat 17" monitor.