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Helpful ReplyDifference between... Adaptive Vsync & Target Frame Rate?

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_Bathory
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2012/03/24 01:30:56 (permalink)
 
I've been wondering about something for a couple of days now and the question is as follows..
What is the difference between Adaptive Vsync and the Target Frame Rate in Precision X. At first glance it would appear the two new options are more or less identical, however I gather that the Target Frame Rate is less stable if the card is not clocked at enough of a setting to handle the designated fps? Hopefully someone can shed some light on this for me..I'm sure I am not the only one pondering this.
 
Many thanks in advance

 
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ChrisS
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Re:Difference between..? 2012/03/24 03:43:20 (permalink) ☄ Helpful
Frame Rate Target will essentially try and cap the frame rate to whatever you set it to. The clock speeds on the card will automatically dynamically adjust based on what is needed to maintain that frame rate at any given time. So if the demand is lower, then the card will downclock because that's all that it needs to maintain that FPS, or vice versa.. boost the clocks to maintain that frame rate under a more 3D intensive scene, for example. Useful for saving power and also for older games/applications which don't demand super high frame rates.
 
Adaptive Vsync will automatically enable or disable Vsync as needed. With traditional Vsync, it attempts to eliminate "tearing" by capping the game's frame rate to your monitor refresh rate. But if the game's frame rate cannot meet or match the refresh rate, the FPS will effectively be sliced in half, or even worse. Which can also lead to the infamous stuttering.
 
Adaptive Vsync, essentially will turn OFF Vsync when your frame rate is below your monitor's refresh rate and will turn it back on if the frame rate can match the refresh rate. Thus you get the best of both worlds....  it still prevents the "tearing" that you can get with Vsync off, but it also prevents the "stuttering" effect that is usually associated with Vsync issues.
 
Hope that was informative
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Re:Difference between..? 2012/03/24 04:45:04 (permalink)
EVGATech_ChrisS

Frame Rate Target will essentially try and cap the frame rate to whatever you set it to. The clock speeds on the card will automatically dynamically adjust based on what is needed to maintain that frame rate at any given time. So if the demand is lower, then the card will downclock to maintain that FPS, or vice versa.. boost the clocks to maintain that frame rate under a more 3D intensive scene, for example. Useful for saving power and also for older games/applications which don't demand super high frame rates.

Adaptive Vsync will automatically enable or disable Vsync as needed. With traditional Vsync, it attempts to eliminate "tearing" by capping the game's frame rate to your monitor refresh rate. But if the game's frame rate cannot meet or match the refresh rate, the FPS will effectively be sliced in half, or even worse. Which can also lead to the infamous stuttering.

Adaptive Vsync, essentially will turn OFF Vsync when your frame rate is below your monitor's refresh rate and will turn it back on if the frame rate can match the refresh rate. Thus you get the best of both worlds....  it still prevents the "tearing" that you can get with Vsync off, but it also prevents the "stuttering" effect that is usually associated with Vsync issues.

Hope that was helpful

 
Thank you for the in-depth explanation Chris!
 
My initial thought was to use the "Target Frame Rate" function to try to cap my fps at 60 to hopefully save a little on my utility bill, but from what I gather if I have Adaptive Vsync enabled this will provide the same function (eliminating the need for the frame rate function) am I correct in my assumption?
 
Thanks again for the quick reply!

 
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Re:Difference between..? 2012/03/24 04:55:39 (permalink)
Assuming your monitor's refresh rate is 60Hz (which, most standard monitors are), then yes.. to an extent.
Your FPS will still cap at 60, but it could (potentially) dip lower.
With Target Frame Rate, it will do its best to keep it at a constant 60.
 
But let's just assume in X game without Vsync, you see an average of 80-100 FPS. Then with Adaptive Vsync you will probably see a constant 60 anyway.
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Re:Difference between..? 2012/03/24 04:59:01 (permalink)
EVGATech_ChrisS

Assuming your monitor's refresh rate is 60Hz (which, most standard monitors are), then yes.. to an extent.
Your FPS will still cap at 60, but it could (potentially) dip lower.
With Target Frame Rate, it will do its best to keep it at a constant 60.

But let's just assume in X game without Vsync, you see an average of 80-100 FPS. Then with Adaptive Vsync you will probably see a constant 60 anyway.

 
Thanks again Chris! 

 
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Re:Difference between..? 2012/03/24 05:04:31 (permalink)
Anytime
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Re:Difference between..? 2012/03/24 05:09:08 (permalink)
AB Was Here... 

 
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Re:Difference between..? 2012/03/24 08:17:08 (permalink)
So... is there any advantage to using adaptive Vsync instead of a target framerate of 60/120/whatever your refresh rate is?
 
Come to think of it... why does Vsync even exist? seems like a "cap FPS at a number equal to refresh rate", would do that same thing only without the drop down that 30/20 etc FPS( that I know can be countered by triple buffering)
 
Maybe tearing sometimes happens below the refresh rate? I've only ever noticed it above the refresh rate really.
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Re:Difference between..? 2012/03/24 17:47:10 (permalink)
is there any input lag with adaptive vsync? waiting on my newegg delivery... (evga 680)
 

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Re:Difference between..? 2012/03/24 21:26:19 (permalink)
topgun0254

is there any input lag with adaptive vsync? waiting on my newegg delivery... (evga 680)


With Adaptive Vsync, when frames are under 60 then Vsync is disabled so you won't have any lag, over 60 frames, then it clamps it as to not get screen tearing so you would have some input lag.
So if you play a game currently that you turn vsync on for then you can expect a similar amount of input lag provided the game your playing breaks 60 fps.
I personally don't notice a difference in terms of input lag with vsync on or off.

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Re:Difference between..? 2012/03/25 17:23:01 (permalink)
Macros

topgun0254

is there any input lag with adaptive vsync? waiting on my newegg delivery... (evga 680)


With Adaptive Vsync, when frames are under 60 then Vsync is disabled so you won't have any lag, over 60 frames, then it clamps it as to not get screen tearing so you would have some input lag.
So if you play a game currently that you turn vsync on for then you can expect a similar amount of input lag provided the game your playing breaks 60 fps.
I personally don't notice a difference in terms of input lag with vsync on or off.

 
I do and its horrible, so would using target frame rate technically reduce tearing if kept at 60fps while preventing input lag?

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Re:Difference between..? 2012/03/25 19:52:46 (permalink)
ssj92

Macros

topgun0254

is there any input lag with adaptive vsync? waiting on my newegg delivery... (evga 680)


With Adaptive Vsync, when frames are under 60 then Vsync is disabled so you won't have any lag, over 60 frames, then it clamps it as to not get screen tearing so you would have some input lag.
So if you play a game currently that you turn vsync on for then you can expect a similar amount of input lag provided the game your playing breaks 60 fps.
I personally don't notice a difference in terms of input lag with vsync on or off.


I do and its horrible, so would using target frame rate technically reduce tearing if kept at 60fps while preventing input lag?

In theory it should, but in real world, not sure.
Hopefully someone with a 680 can run a benchmark with some results on using target framerate and whether or not it will downclock the GPU while in game to keep frames at or just under 60.
 
Or we just need Jacob to set it straight for us!

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Re:Difference between..? 2012/03/25 20:55:38 (permalink)
Macros

ssj92

Macros

topgun0254

is there any input lag with adaptive vsync? waiting on my newegg delivery... (evga 680)


With Adaptive Vsync, when frames are under 60 then Vsync is disabled so you won't have any lag, over 60 frames, then it clamps it as to not get screen tearing so you would have some input lag.
So if you play a game currently that you turn vsync on for then you can expect a similar amount of input lag provided the game your playing breaks 60 fps.
I personally don't notice a difference in terms of input lag with vsync on or off.


I do and its horrible, so would using target frame rate technically reduce tearing if kept at 60fps while preventing input lag?

In theory it should, but in real world, not sure.
Hopefully someone with a 680 can run a benchmark with some results on using target framerate and whether or not it will downclock the GPU while in game to keep frames at or just under 60.

Or we just need Jacob to set it straight for us!

 
So I tried frame limit on and it stays at 60 nicely. There isn't much tearing anymore but it still does every now and then. I like it and it doesn't seem like it really adds input lag, but i'll have to test in more games to check on that.

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Re:Difference between..? 2012/03/25 21:19:00 (permalink)
Yes, using target frame rate may downclock the GPU in order to maintain 60FPS. But it doesn't really matter, since all you need is 60 frames and on the plus side it saves power :)


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Re:Difference between..? 2012/03/28 01:51:10 (permalink)
I dont think youll be able to use target frame-rate in lieu of adaptive vsync to keep FPS @ 60. Maybe in games where you'd be struggling to reach 60+ sure, it could be useful to prevent tearing without the input lag of vsync.
 
But if you can look at a wall/NPC/whatever and climb to upwards of 100fps, your gpu WILL downclock and keep you at 60. Then as soon as you turn around, you WILL hitch as the GPU clocks back up for the increased load. I don't see how its possible that you wouldnt, but my 680 hasnt arrived yet.
 
I don't really see any way around it. It's tearing, or input lag.


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Re:Difference between..? 2012/03/28 06:49:01 (permalink)
EVGA_JacobF

Yes, using target frame rate may downclock the GPU in order to maintain 60FPS. But it doesn't really matter, since all you need is 60 frames and on the plus side it saves power :)

 
Precision X shows 100 as a maximum target frame rate. What you would recommend to enable/disable when using 120hz monitor? Is there any benefit of using the adaptive vsync or target frame rate options in that case?
 
Thanks!
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Re:Difference between..? 2012/03/28 12:34:55 (permalink)
presy

EVGA_JacobF

Yes, using target frame rate may downclock the GPU in order to maintain 60FPS. But it doesn't really matter, since all you need is 60 frames and on the plus side it saves power :)


Precision X shows 100 as a maximum target frame rate. What you would recommend to enable/disable when using 120hz monitor? Is there any benefit of using the adaptive vsync or target frame rate options in that case?

Thanks!

 
Actually next version will increase to 120Hz :)
 
If you don't care about limiting your framerate/saving power, or notice any visible tearing, then you don't need to use either.


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Re:Difference between..? 2012/03/30 17:22:28 (permalink)
How is target frame rate different than setting a frame rate limit in the drivers? I assume it is essentially the same? I just ran Skyrim with 8xaa and high quality ambient occlusion and the clocks still go down to 1000 or less when I set it to 75 fps in the drivers. In Markarth I think they went down to 700. lol
 
If you want 120 fps right now you can use Nvidia Inspector. I usually edit the driver with it anyway. Not sure if frame rate is even listed in the drivers TBH.

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Re:Difference between..? 2012/04/01 08:39:47 (permalink)
So if I use Adaptive Vsync do I turn off Vsync in game?

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Re:Difference between..? 2012/04/01 12:17:40 (permalink)
enigma96

So if I use Adaptive Vsync do I turn off Vsync in game?

 
Yes, there's no need for it inside of the game, because Adaptive Vsync is ran from the Nvidia Control Panel. 

 
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Re:Difference between..? 2012/04/04 08:33:04 (permalink)
So I could use target frame rate to play old games that we use at our LAN parties and not get much input lag. We usually play UT 2004 and Team Fortress 2, which get into triple digit FPS with my current 570.
I usually play with vsync off for those, but then the card's running at 98% w/ 235 FPS, 78 C.

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Re:Difference between..? 2012/04/11 05:43:38 (permalink)
EVGA_JacobF

presy

EVGA_JacobF

Yes, using target frame rate may downclock the GPU in order to maintain 60FPS. But it doesn't really matter, since all you need is 60 frames and on the plus side it saves power :)


Precision X shows 100 as a maximum target frame rate. What you would recommend to enable/disable when using 120hz monitor? Is there any benefit of using the adaptive vsync or target frame rate options in that case?

Thanks!


Actually next version will increase to 120Hz :)

If you don't care about limiting your framerate/saving power, or notice any visible tearing, then you don't need to use either.

 
So individuals with 120hz monitors should wait for the next version to utilize Target Frame Rate?
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Re:Difference between..? 2012/04/11 09:01:01 (permalink)
saer.
So individuals with 120hz monitors should wait for the next version to utilize Target Frame Rate? 

The "next" version got released yesterday, so its out. Go download and have fun.

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Re:Difference between..? 2012/04/19 12:41:40 (permalink)
Guys, I love the FPS limit and for me it works perfectly in BF3 using a 120Hz monitor and a FPS limit of 90.
This really helps to reduce temps and loudness by avoiding not required FPS > 100 which are useless anyway.
A great and innovative idea.
Question for Jacob: What happens with the FPS limit of 90 when 3D Vision is activated? Does this then result in 45FPS?
Did not have time yet to check this out.

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Re:Difference between..? 2012/04/30 14:09:21 (permalink)
When you use Precision X's Frame Rate target will the 680 turbo up and clock down to try to keep frame rates at 60 (if we choose 60fps)? Should I enable frame rate target AND adaptive v-sync? 
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Re:Difference between..? 2012/05/08 15:14:24 (permalink)
Hi Guys,  can someone tell me  is there any point in overclocking my 680 in precision x if im using Adaptive Vsync and getting 60fps at stock speeds?
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Re:Difference between..? 2012/05/12 02:40:28 (permalink)
There is always point to overclocking!  Even at 6,000 fps!!!!
post edited by MeltedSolid - 2012/05/12 13:22:09
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Re:Difference between..? 2012/05/12 05:01:28 (permalink)
MeltedSolid

There is always point to overclocking!  Even at 600 fps!!!!

Ok.....  let me put this a different way, If I am using Adaptive Vsync using stock clocks and am getting a constant 60fps what advantage will I see if I overclock? also if my fps never dips below 60fps (im referring to Battlefield 3) then is there any point in using 'Adaptive vsync',  surely I will see the same results just using the normal in game Vsync?
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MeltedSolid
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Re:Difference between..? 2012/05/12 13:23:01 (permalink)
Recheck my post.
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Re:Difference between..? 2012/05/12 15:12:08 (permalink)
MeltedSolid...who are you replying to?
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