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Adaptive Vsync does it work well? - Page 2

post #11 of 30
Quote:
Originally Posted by JassimH View Post

Adaptive VSYNC:
IF YOU CAN GET OVER 60FPS, YOU WILL BE CAPPED AT 60FPS ON A 60HZ MONITOR.
IF YOU GET 58 FPS IT WILL NOT BE 30FPS IT WILL BE 58FPS.
IF YOU GET 31FPS IT WILL BE 31 FPS NOT 30 FPS.
Normal VSYNC:
Over 60 = 60 fps
under 60 is 30 fps
under 30 = 15 fps
under 15 GL.
Basically it will sync if over your refresh rate, if under it it won't.
the fps you're getting is accurate. 60 will be maximum, minimum will vary.

So with adaptive vsync, if you drop below 60, it turns it off?

That's pretty lame, and explains why I thought it wasn't working. Any way to change it? Say, turn it off if you drop below 30? I'd much prefer that.
    
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post #12 of 30
Quote:
Originally Posted by PiERiT View Post

So with adaptive vsync, if you drop below 60, it turns it off?
That's pretty lame, and explains why I thought it wasn't working. Any way to change it? Say, turn it off if you drop below 30? I'd much prefer that.

Use Adaptive (Half refresh rate). thumb.gif

Either ways I love how Adaptive vsync works. wink.gif
    
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post #13 of 30
Quote:
Originally Posted by kcuestag View Post

Use Adaptive (Half refresh rate). thumb.gif
Either ways I love how Adaptive vsync works. wink.gif

I think that just caps me at 30. Not quite what I want. frown.gif
    
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post #14 of 30
Well there is something else here...

Modern games have Vsync + tripple buffering.

That means the framerate won't go from 60 to 30. It can be at 58 for example.

It is not as simple as that but let me try an analogy: Monitor shows 60 images per seconds. GPU generates 60 images too. We have one frame for every screen refresh. Then the GPU lags behind and produces only 58 frames. The GPU needs to display 60 images and therefore it will show the same frame twice, while a new one is being prepared. Twice the same frame means the instantaneous framerate was only 30fps. Screen was refreshed effectively after 1/30 sec.

With tripple buffering, a third frame is ready to be displayed, hence no repetitive frame will be shown. 58 can be showed too. The only downside of Tripple buffering is input lag (notorious to vsync) and video memory footprint.
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post #15 of 30
Quote:
Originally Posted by PiERiT View Post

So with adaptive vsync, if you drop below 60, it turns it off?
That's pretty lame, and explains why I thought it wasn't working. Any way to change it? Say, turn it off if you drop below 30? I'd much prefer that.

That's only useful if you have regular peaks above 60 and regular dips below 30.
I'm not sure what game / settings you can find that in, and if there is one, I think your best bet would be to use adaptive and lower your graphics settings until you don't dip below 30.
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post #16 of 30
Quote:
Originally Posted by GrandMax View Post

Well there is something else here...
Modern games have Vsync + tripple buffering.
That means the framerate won't go from 60 to 30. It can be at 58 for example.
It is not as simple as that but let me try an analogy: Monitor shows 60 images per seconds. GPU generates 60 images too. We have one frame for every screen refresh. Then the GPU lags behind and produces only 58 frames. The GPU needs to display 60 images and therefore it will show the same frame twice, while a new one is being prepared. Twice the same frame means the instantaneous framerate was only 30fps. Screen was refreshed effectively after 1/30 sec.
With tripple buffering, a third frame is ready to be displayed, hence no repetitive frame will be shown. 58 can be showed too. The only downside of Tripple buffering is input lag (notorious to vsync) and video memory footprint.

^^^ This (more or less wink.gif)

With current drivers, almost no games drop to 30fps anymore with regular v-sync just because the FPS dropped below 60fps. Haven't seen that happen in YEARS on my rig, and I ALWAYS use v-sync. Probably is still possible for that to happen on certain older games though.

And when that 30fps drop thing happens, you DO see it in your FPS counter. It 'registers' there.
Edited by brettjv - 4/2/12 at 11:10pm
    
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post #17 of 30
adaptive vsync is poor man's regular vsync + triple buffering. just get D3Doverrider and enjoy proper vsync with always working triple buffering.
post #18 of 30
Yeah, normal vsync + triple buffering is undeniably superior to adaptive vsync, which may still tear to some degree at frame rates below 60.
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post #19 of 30
Quote:
Originally Posted by JassimH View Post

Adaptive VSYNC:
IF YOU CAN GET OVER 60FPS, YOU WILL BE CAPPED AT 60FPS ON A 60HZ MONITOR.
IF YOU GET 58 FPS IT WILL NOT BE 30FPS IT WILL BE 58FPS.
IF YOU GET 31FPS IT WILL BE 31 FPS NOT 30 FPS.
Normal VSYNC:
Over 60 = 60 fps
under 60 is 30 fps
under 30 = 15 fps
under 15 GL.
Basically it will sync if over your refresh rate, if under it it won't.
the fps you're getting is accurate. 60 will be maximum, minimum will vary.

What happens with a 76HZ monitor like mine? o.O
     
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post #20 of 30
Quote:
Originally Posted by Jocelyn84 View Post

What happens with a 76HZ monitor like mine? o.O

Well the same. Worst case, your GPU has not sent a new frame to your display so it reuses the same frame twice for 2/76 of a second. This results in a 38fps instantly.

But again, with tripple buffering, there is a third frame in the buffer to avoid this very situation. The cost is some vram and an additional delay of 17ms.

I am surprised though when I check the following comparison from here:

331

Why is it so effective?
Edited by GrandMax - 4/9/12 at 1:18pm
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