Assetto Corsa - FPS / VSYNC and "micro-stutter".

[Crunch]

I was just wondering if anyone else here was experiencing a constant "micro-stutter" when playing AC at anything other than 50 or 100fps.

If I use any other fps / v-sync combo other than 50 or 100 I get a constant micro-stutter. This is not fps (or lack of) induced stutter, nor does it have to do with graphics settings. I could be at 60 fps the entire time and everything "jitters" on screen, switch it to 100 and the stutter is gone. This issue occurs both with and without v-sync enabled.

We have gone round and round with this issue on the official forums but with no solution. Kunos does not seem to recognize this problem; however, this isn't an isolated issue as it seems to affect a certain number of people, but not all, which is the strangest part.

[Turabu]

I am getting this stutter too. When I turn the fps monitor on, it of course shows a downwards fps spike. I have no freaking idea what's causing this.

[Redmist]

People clearly have no understanding of the word "Microstutter". Frame drops/spikes are NOT microstutter.
This 60Hz issue still exists in the latest build so it's unlikely that it will be fixed before the release. Somebody will have to make a slow motion video capture that makes it more obvious and point it out to the devs because it seems they can't see it.

[anonymous]

Hi i have post a small solution some day ago

Try this fix for micro stuttering problem
For people with good config and suttering problem ,

i have follow this tutorial and now my micro suttering have disappear

The tutorial is for french people but you need just to go in registry and change 1 key by other one.

The problem is the windows memory , is for win7 and win8 (8.1)

STEP 1 : START -EXECUTE -REGEDIT

STEP 2 : HKEY_LOCAL_MACHINE" -> "SYSTEM" -> "CurrentControlSet" -> "Control" -> "Session Manager" -> "Memory Management". AND at the right you can see DisablePagingExecutive , click on it and change 0 by 1

STEP 3 : close registry and REBOOT COMPUTER.

I HAVE found the FIX here http://www.assetto-corsa.fr/forum/les-problemes-techniques-reglages/4566-probleme-de-micro-saccades.html

check at the middle of the page ,he have a picture for what you need to do !


sorry for my english but for me and a lot of people this fix is like a miracle :-) , good race !

[ave]

Цитата допису Marty Cerven:

For me the main advantage of alt enter is that it uses triple buffereing with v-sync without it tends to either be at 60 or half frame rate. Doing alt enter I can get any frame rate below the sync rate and its smooth where the way the game starts up on its own with a large field it may be half frame rate at the start line. Pressing alt-enter will get me to 60 or very close, also into the first corner there is a noticeable slowdown with v-sync on with AI locking up but after the alt-enter it only drops slightly below the sync rate but stys smooth.

I also cap rate as this tends to avoid any micro stutter though I dont know why, I still get very minimal with v-sync and no cap but if I cap 1 or 2 frames above the sync rate it stays pretty solid mostly.

Thank you so much for your suggestion at pressing Alt+Enter going to full screen again and re enable V-sync it never crossed my mind litterally saved my day.
After tweaking and playing with the Nvidia Inspector and in-game settings for hours searching for any combination possible in order to solve any stuttering / jittering issues i finally solved it and when i pressed alt+tab and realised that fps started going up and down AGAIN i was so close to give up, anyway long story short.. thanks again :) !

My rig :
intel core 2 duo (E8400) 3.00GHZ
GPU : GTX560 1GB
RAM 4GB
Monitor : Samsung 120hz SA700d 3D
Assetto Corsa version : 1.0.1

Nvidia Inspector Settings : AA 4x , AF 8x , Vsync : 1/2 refresh rate (the reason being used half the refresh rate is because my monitor runs @ 120hz) , and Vsync Tear Control to Adaptive

In game settings : Post processing settings : on , Shadow Resolution : Medium , Reflection quality : Medium, Smoke : Low

It is the only solution that i figured out and runs very smooth for a decent rig.
Even running @ 80-90-100 fps screen tearing is again noticable although not so much but it's there.
Developers should fix issues like this , it is not acceptable and they are so close to the official release

[Marionette]

Set vsync on.

Set framecap to the same as your refresh rate.

enjoy liquid smooth performance with no screen tearing or input lag.

Quit ♥♥♥♥♥♥♥♥.

[Torrada]

Well I had this problem too...playing the game at 70 fps and having to deal with stutters.. What solved the problem for me was setting the frame limiter at 61 fps (60hz monitor here) so good luck! Hope it will solve your problem!
Sorry for my bad english.

[kazereal]

Цитата допису ThereIs0nly0ne:

Fair questions. I don't know about the op. It I have a GTX 680 4gb with a 2600k I7. FPS is always 60 (with a single car on track) and CPU never more than 80% used with a full grid. Fraps and EVGA precision used to monitor FPS.

This may be silly question or answered already but just checking..

What does the AC in-game FPS counter show you?
Without other software and overlays on the AC screen at the same time.

While in car you find FPS "app" in the right-side menu to show it while driving.

Just curious if those monitoring software could cause problems by interfering somehow with the way AC is rendering. I'm having pretty fluid 60-80+ fps with just Steam overlay enabled.

[ave]

Цитата допису Socket7:

Set vsync on.

Set framecap to the same as your refresh rate.

enjoy liquid smooth performance with no screen tearing or input lag.

Quit ♥♥♥♥♥♥♥♥.

Try alt tabbing and then back in to the game with v-sync , vsync gets disabled the only solution is to alt+enter, it seems somehow for some unknown reason that fullscreen mode its not really fullscreen anymore, that was my problem and since im using nvidia inspector for my settings i just pointed them out.

This problem appears in almost every single pc out there
A perfect example is what Redmist is describing ..

Цитата допису Redmist:

Really? I'm yet to see a PC that's not affected. Try driving along and watching trees etc at the side of the screen. They should be liquid smooth. It's not an occasional stutter, it's a constant "jitter" (which is why a lot of people don't notice it) and only at 60Hz with vsync.

[Marionette]

Цитата допису vvv:

Try alt tabbing and then back in to the game with v-sync.

Why would I check my facetweetumblrreddit in the middle of a race?

My car makes an annoying noise when I open the door at highway speeds and try and get out of it! Maybe I shouldn't do that.

[ave]

Цитата допису Socket7:

Цитата допису vvv:

Try alt tabbing and then back in to the game with v-sync.

Why would I check my facetweetumblrreddit in the middle of a race?

My car makes an annoying noise when I open the door at highway speeds and try and get out of it! Maybe I shouldn't do that.

hah well lets just say for the sake of the arguement that i want to put some music on or change a song ( yeah i like to listen to music sometimes when im driving around )

[Vinnie the eel]

Цитата допису Marty:

I dont get any micro stutter at 2560x1440 cant set 60p in game onky allows 59. If I use V sync I also set frame limit to 61 and it runs fine much smoother then v sync off which gets the micro stutters or bad tearing. Tbats with an OC titan pretty much maxed out, one thing I found is full screen rendering doesnt have triple buffering for me even if forced in drivers. If you alt+enter to go window mode then again to go back to full screen rendering it has triple buffering and is much smoother all up.

If I dont do that then any time it fets below the sync rate the fps hit is quite big and sometimes goes to half rate. Doing that before the race keeps min rates much the same as sync off and very smooth. My setup can pretty much stay above 60 most of the time but start of ai race tends to drop to 50 especially with lots of smoke or drunken AI taking eachother out sometimes. :)

Pressing alt enter confirms it goes back to full screen as I can use NV shadow play to record vis this way but if using window mode tbis wont record video. Still strange how I need to do this to make sure it stays smooth if the frame rate ever drops below sync rate even only for a couple frames.

Life saver!!
The stutter was ridiculous but this alt enter trick worked and now it's solid 60fps silky smooth!

thankyou

[Mulgersson]

Hi,

i7-7700k
GTX 1080 ti
3x 27" 144Hz G-sync monitors
Win10 64-bit

I get micro stuttering while playing:
- gsync is enabled for fullscreen and windowed
- tried the game with fullscreen mode and without
- nvidia setup with surround mode and without
- have limited fps in game to 140, or not limited, no difference
- installed Nvidia latest drivers (also clean install)
- removed processor OC
- GPU-Z does not give any suspicious failures
- picture settings does not have an effect to it (AC test gives 130fps average, 40 min with all maxed out)
- have NOT tried vsync, and will not as I have gsync monitors

Any suggestions what I could try next?

[Mr Crisp]

Do you have any GPU monitoring software, I think Kunos said some time ago certain GPU or CPU monitoring software can cause AC to stutter.

You can also use the ingame on track rendering app and look at the CPU and GPU, not sure how to interpret it. Also has it always done it, with all drivers you have used? Disabled Windows 10 Gamebar etc?

[Mulgersson]

I now used GPU-Z to check the problems, however the issue was there before that. So that should not be the issue.

Rendering app in the AC shows steady fps, without any "hassle" e.g. stays at 140fps (if I set the limit to 140). When I use monitor refreshrate display (with gsync) the same time it shows that the fps is changing somewhere 120-143Hz. But that should be normal I think.

I have disabled some of the Win10 game "apps", I will check that once more.

I have not tested older GPU drivers with this card.

[Mr Crisp]

Have you set an Nvidia Control profile for acs.exe and made sure you select `maximum performance` mode from the 3d settings? Also you could try making some adjustments to the 3d settings for acs.exe to see if it helps.