1/2, 1/3, and 1/4 refresh rate (for version 300+ drivers).

 

I've already read one report in the FSX forum of smoother display using 1/2.

 

I have to be honest, I've never used vsync and don't really understand it's purpose if framerates in FSX are way below 60 to begin with. I always thought vsync was used just to keep the frame rate from shooting above the refresh rate.

 

So I'm not sure which of the above settings I would want to use if for example my framerates are in the mid 20s.

Vsync prevents image tearing Bud.

 

 

If you turn Vsync ON in windowed mode FPS can only be 60, 30, 30, 15 because unlike full-screen it's not triple buffered.

I see no point in having Vsync set to half the refresh rate (30 FPS in most monitors) because if FSX goes bellow 30 FPS it's still going to drop to 20FPS.

 

...unless you can have adaptive Vsync in GPU's other than the 600 series. Adaptive Vsync automatically switches off Vsync if the frame rate goes bellow the refresh rate.

So if you can set the Vsync refresh rate to 1/2 (30 FPS) and have adaptive Vsync work based on that, you prevent image tearing whenever you can keep 30 FPS or more, and when FPS drop bellow 30 Vsync is switched off to avoid the perf hit. That would also mean no need for a frame rate limiter anymore.

 

Again this only applies to windowed mode. In full-screen with Vsync on there's no performance hit regardless of the frame rate FSX is running at (for example, at 28 FPS it won't be force down to 20FPS since it's triple buffered)

Thanks Dario, so in full screen mode, getting maximum 30 fps, is there any reason to enable vsync? I have no screen tearing at such low framerates.

Thanks Dario, so in full screen mode, getting maximum 30 fps, is there any reason to enable vsync? I have no screen tearing at such low framerates.

 

In full screen there's no reason to NOT use Vsync really. There's no performance hit and prevents image tearing, so it's a win-win situation.

Tearing may not be too apparent until you start panning the view around. If you use TrackIR you will definitely notice the tearing.

 

I fly in windowed mode most of the time, so I would really love to have adaptive Vsync

Interesting,

 

So if I understand correctly , one could set vsync to 1/2 - and with a 60 mhz refresh rate monitor, then it would lock the framerates from exceeding 30 fps? Therefore in essence accomplishing the same, as the external frame rate limiter included in Inspector?

Am I understanding this correctly, or is it different in a way?

Interesting,

 

So if I understand correctly , one could set vsync to 1/2 - and with a 60 mhz refresh rate monitor, then it would lock the framerates from exceeding 30 fps? Therefore in essence accomplishing the same, as the external frame rate limiter included in Inspector?

Am I understanding this correctly, or is it different in a way?

Don,

 

I can infer that by keeping FSX's fps as close as posible to the refresh rate, one will have a smoother FSX. A refresh rate of 30 is closer to the fps that can consistently be maintain in FSX.

 

I keep Vsync ON or I get image tearing.

Interesting,

 

So if I understand correctly , one could set vsync to 1/2 - and with a 60 mhz refresh rate monitor, then it would lock the framerates from exceeding 30 fps? Therefore in essence accomplishing the same, as the external frame rate limiter included in Inspector?

Am I understanding this correctly, or is it different in a way?

 

Yes, that's the idea. You get adaptive Vsync at half the refresh rate. So in a 60Hz monitor, frame rate gets capped at 30FPS, but in demanding situations where the frame rate drops below 30FPS, Vsync automatically switches off preventing it from being forced to 20, 15, 12 FPS. Question is if this works in windowed mode, because in full screen it's completely pointless.

Seriously, no one has tried it yet?

I can infer that by keeping FSX's fps as close as posible to the refresh rate, one will have a smoother FSX. A refresh rate of 30 is closer to the fps that can consistently be maintain in FSX.

 

Agreed, I always run with vysnc on as I don't want the texture tearing especially as I use Track IR.

 

Thanks,

 

You get adaptive Vsync at half the refresh rate. So in a 60Hz monitor, frame rate gets capped at 30FPS, but in demanding situations where the frame rate drops below 30FPS, Vsync automatically switches off preventing it from being forced to 20, 15, 12 FPS

 

Hmm, ok so I fly in full screen mode - this would not be a good idea for me then, as I don't want to see texture tearing if vysnc automatically switches off. Sounds like I would be better running the standard vsync on and limiting my fps to 30 externally via Inspector as I have been doing.

 

Thanks for the info,

FXAA

 

 

 

 

 

NO FXAA