Fix iRacing Stuttering Issues for Good! | Guide to Smooth iRacing

[@McFamily86]

I will be honest, I have a 13700K and 4090 and I found your graphics video a couple months ago to miss the mark on quite a few things. However, this is just the opposite. You absolutely, 1000% nailed it and it IS repeatable every single time. I've tested this close to a dozen times using RTSS frametime graph and the stuttering with anything iRacing related (primarily the UI is what gets power throttled) consistently and repeatably causes stuttering. I am a scientist and know how to test a hypothesis. Thank you for discovering this!

[@NesterowiczRacing]

Using RTSS frametime graph is essential. lots of people dont use it...

[@L_Emir_de_Passy]

unbelievable. Half of my iracing processes were on efficiency mode. It seems as though it fixed it. thanks a lot.

[@scottwoodtraining]

THANK YOU! I’ve been battling this intermittent issue ever since I began iRacing and it’s almost never discussed on reddit or anywhere else. It stops just long enough for me to think I’ve solved it then returned. For me the video quits, but audio and ffb continues. I’ve ruined my races, and others countless times. Hopefully this will be the fix I need!

[@Zee20Ate]

Absolutely agree with undervolting. I started doing it when I got a 3080 and quickly realized I got higher and more consistent GPU clocks. I think a lot of people think undervolt is only relevant when their temps are too high. With GPU boost the cooler the card is the better it will boost.

[@tkhacker4207]

You're a legend for all the detailed videos!

[@GTI-Eddy]

One thing I did on my system where I had constant micro stuttering, the higher the FPS shown in the counter the lower it actually felt like in game EG 180FPS felt like 30FPS, literally. I researched it and researched it and never came across anyone else that tried what I did. I discovered that when ever the RGB in my case was set to multicolour like rainbow it would cause me stuttering. I made everything static single colour or just off, and haven't had any micro stuttering for weeks now, the only time I had it happening again was when I did the Spa 24 hour race with the rain, but other than that, it's smoother than ever before. For reference I have iCue and Aura Sync controlling my RGB. My next PC for the rig will be RGB free if I can help it. Do encounter massive stutters once in a while though like anywhere between a freeze time of 1 to 5 seconds (fatal on track). Yet to figure that one out, will try some of these you've mentioned.

[@Mako_Racing]

much appreciated, thanks so much for the deep dive both here and in previous videos

[@yigitonayli]

I have almost the same computer as you. (4090-13900KS). I'm having the same problem. Your previous videos did not solve my problem. I hope this video will fix my stuttering. Thanks so much for your work!

[@jgomez7535]

Thanks for the info, much appreciated 👍🏽

[@mikelsala]

First of all, thanks for the video. I have been struggling for months/years with an issue in iracing: when a driver connects to a session, I have a stutter at that exact moment. I tried enforcing all the limits of the CPU in the BIOS and it seems to be solved (wow). I tried before, hundreds of settings, undervolting as well. I bought a 4070 ti super and the problem continued... So I was sure that was somethintg related to my 10900k. I need to do more testing, but it looks like, the key for me, was enforcing the limits of the cpu. In a near future, I´ll buy 78003Dx. For iRacing, it seems to be the best cpu, avoiding this kind of issues.

[@mrb552]

Had an iRacing stuttering issue for two weeks after upgrading video drivers. Turns out while my triple monitors were set at the proper refresh rate of 165hz, my HDMI fourth monitor was not set to 144hz (it's preferred refresh rate). Rather it was at a default of 60hz which caused the issue. Setting the fourth monitor to 144hz fixed everything. Note to self - don't do a custom installation when upgrading video drivers. Choose the express installation option instead. I immediately created a backup image of the system to restore from in the event of a similar problem in the future.

[@chuckystang]

Is there a problem if your alternate monitor's refresh rate just differs a lot from your main monitors?

[@mrb552]

​@@chuckystang Shouldn't be an issue. Just make sure that the alternate monitor is set to it's max refresh rate in the Nvidia (for example) control panel. My HDMI 4th monitor runs at 144hz but it got reset to default 60hz after a custom upgrade of new drivers which removes existing drivers settings and appears to install the newer drivers with all their default factory settings.

[@Arthur-Tromp]

I own you one, buddy. Apparently I had the same issue with my fourth HDMI monitor. Set the refresh rate to max and iracing is smooth as silk again so far (knocks on wood). So your solution is much appreciated!

[@FoxRob93]

Thank yoou for this information I've been having the same issues and recently been turning into clock smash errors too.

[@steveramundo4946]

using win10 - (I found you can add the power throttleing colunm, by right clicking the columns and adding it!) This could be huge - can't believe no one else ever found or mentioned this - great catch man... and Thanks for the video! It was my impression that undervolting your card or CPU will allow you to hit good clock speeds, without overheating BUT i didn't think clock speeds or high frame rates, on thier own would fix studdering issues.... Not saying it doesn't because there are a million and one reasons why studdering happens.... Could it just be INTEL and thier new architecture that is failing you?

[@chuckystang]

High FPS definitely doesn’t mean no stutters unfortunately

[@DaRaginCajun81]

For s game ive payed almost 1k into, i cant believe how much tech support needs to be done.

[@Zenek-40]

Hi as stuttering can really have different faces, it would be good is you say what exactly was happening to you. Were you getting microstutters that damagw feeling of smooth gameplay? It doesnt matter 60 120 or 165 FPS - with microstutters it all time feeles slow, feels like 30FPS. iRacing for me is really stuttering game, its stuttering engine in my opinion. Can you compare to AC1 or Automobilista2 and say is your iRacing anywhere close with smoothness to those titles?

[@TalkieT]

Have you been able to show a clear A-B-A-B performance change with these changes?

[@adrianjemmeson7747]

Do you need to change the power throttling option every time you turn your pc on in task manager? Seems after a reboot my racelabs and iracing ui switch back to power throttling enabled

[@lg.manuela]

Got the same doubt.... Do you found out the answer?

[@123marytodd]

I downloaded and ran Unifine Heaven. This is what came back with the Settings you posted. FPS: 68.4 Score 1723 MinFPS 34.3 MaxFPS 146.8 My CPU model: Windows 10 12 GEN tail core I 7-12700K (3609MHZ)x12. GPU model: Nvidia GeForce RTX 4070 32.0.15 6636/intel(R) UDR Graphics 770 32.0.101.6129 (4095MB) x 1 I have 64 MB of ram. Not sure what a good benchmark is for Iracing. Please reply.

[@johnsheehan3671]

RTX 4080 here. I had no issues until the 2024 season 4 update. According to the IR forum threads am not the only one so I think it is pretty much an iracing software related issue

[@VictorFariaspersonal]

I’ve played in beggining of the year and no problems at all, stop playing and comeback now, man, sooo many stutters😢

[@ewenblack4174]

I believe it’s an iracing issue, I’ve had the same system for two years with no stuttering problems, i swear this just started after a big update about 5-6 months ago.

[@CatchFenceCori]

Disabling the throttling in task manager netted a few fps. I don’t have an ultra performance mode though

[@yigitonayli]

Even though I tried everything, I couldn't fix the stuttering problem. The system is installed on powerful hardware such as 13900KS, 4090, 64 gb 6000 mhz ram and all my drivers are up to date. And I am using a 170 Hz 1440p triple monitor setup. I changed the display cables. I tried the game on Windows 10. I undervolted the processor. I tried it with Nvidia surround and without Nvidia surround. I have a regulator that stabilizes the electricity of my house at 220W. Even though I tested many times in many settings, I could not fix the stuttering problem. I saw that there was no stuttering only when I run the game on a single screen. In this case, there were two solutions that came to my mind. The first is to change my motherboard and processor and switch to AMD. The second is to use a single, large ultrawide monitor. what do you think? What do you recommend ? There are almost no resources on the stuttering problem. That's why I'm asking for help here. Thanks a lot.

[@racingwithryan214]

Great video ! I was trying to under volt my GPU with MSI afterburner but after doing that, OBS (GAME capture) is no longer working. I use OBS on the same machine for my sim racing. Does this happen to you too? After a reboot and not using msi afterburner OBS works perfect again with game capture.

[@lancebrantlinger-tommy3558]

Is this something you have to do when starting up the computer and game every time?

[@SidgeRacing]

The under volt did awesome for my frames and PC ran awesome. Until it rained. The rain killed the performance. Dropped to 38-40 FPS. No I didn’t have SSR on. But a dry track it runs amazing

[@milliebays1801]

Racelab is heavyyy

[@DahStratMode3]

Could not find power throtting for windows 11. Tried the right click for column but no poer throtling option

[@RalphVeiga]

Right click on any collumn name and choose 'select collumn' this will open another screen with all the options, check mark power throtting.

[@DahStratMode3]

@@RalphVeigathanks mate

[@mikecrisp6474]

Should I worry about undervolting my i5 9500 and rx6600?

[@IthacaDon]

My task manager details is not showing power throttling column.

[@haki0720]

Right click on the column and tick on

[@vahamehanovic1192]

There is no throttling column to tick

[@willracer1jz]

​@haki0720 thank you for the heads up, it's showing up for me now

[@adrianjemmeson7747]

@@vahamehanovic1192did u find out how to get the throttling column? I have same problem

[@diogofigueira6423]

@@adrianjemmeson7747 right click on any column header, Select columns, add power throtling

[@jeeziRacer]

Change the cube maps rendered to 0 No stutters , ever ..

[@aabe4327]

Nope. That didn't fix it for me at all. Currently practicing for Daytona and the stutters are driving me mad. I get the first one leaving the pits. Then another going through the horseshoe. Then the third usually as i enter the second horseshoe. Some times there is one through T6. But the worst is when I get one exactly on the apex on the busstop entry. This is driving me mad. i can't race like this and I am runig out of ideas.

[@chuckystang]

It was freaking RaceLabs for me and I am on a brand new PC build, 4090 i9 13th gen plenty of RAM, etc.

[@ragg6]

your tip was the one that worked for me aswell. Closed my RaceLab and stutter was gone

[@bacon197ii]

same for me. fine with ioverlay or simhub overlays. but racelabs devs thinks the app runs fine and messaged me that i should lower graphics settings to minimum instead. lol

[@paleddar]

@@ragg6I have the same exact problem. If I quit racelab, and only that, others like trading paints, DRE and my wheel software all on, it works perfect no stuttering at all. Switch on Racelab and within minutes the stutter comes back and gets intermittently worst over time.

[@paleddar]

Same for me. Stutters when Racelab is on. Run everything else except Racelabs and stuttering is gone. AMD 5600 16GB/1TB SSD, 6800XT 16GB, Windows 11 Pro

[@Etrius76]

Hmm I dount have Power Handling. I have all other columns but not this one :/

[@mcmillin08]

You'll need to add it to the list of columns being displayed. Right click on any header to edit the list, I believe.

[@markcrooks1631]

Power throttling doesn't appear in the task details for me

[@Stu-3845]

Right click the column headings and click select columns - you'll find it in there

[@markcrooks1631]

@@Stu-3845 I suspect I don't see it because I am on the "high performance" power plan which disables power throttling across the board. So that would be a simpler implementation rather than what is suggested here. You need to click on "create power plan" to get high performance mode and from there you can customize.

[@Stu-3845]

@@markcrooks1631 I am on high performance too, but still some processes were set to throttle

[@jessemcmenamin676]

My computer failed horribly when I did a league last night with 50 cars .

[@kevinbruner4929]

Has anyone been able to disable RaceLabs power throttling permanently? I have to change every time I use iRacing.

[@raven9057]

argh people saying literally when they mean figuratively

[@xSMOKED]

9700k and rtx2080 never had stuttering at all 😅

[@fedebe8977]

i solved stuttering disabling fTPM on BIOS

[@Panterluca]

Just Stay on windows 10 :) problem solved

[@Crownleyian]

Yeahhhh as an IT professional I can tell you you’re very wrong!

[@Panterluca]

@@Crownleyian and the ryzen performance issues with windows 11 ?, it also seems that every time there’s an update it seems to break something else, show me a benchmark where windows 11 outperforms iracing on windows 10 and I’ll believe you, but I’ve built lots of machines even running windows 11 and there’s basically zero performance benefit

[@Crownleyian]

@@Panterluca and I’ve worked on multiple Windows 10 systems where the taskbar and system settings always glitch not to mention Microsoft SSO that never appears. I’m getting 220fps on Windows 11 and I’m not experiencing any issues.

[@paderborner5213]

Can someone explain to me, how the performance setting for the iRacing UI, which is minimized in the background, can affect the performance of the iRacing Simulator, which is already running without power throttling? If anything, I'd expect the performance of the Sim to regress, since the system now needs to take care of another (useless) task with high priority. The same goes for the Racelabs UI. I would assume the 4 different tasks in the list below to be related to the actual overlays. Again, the system now needs to handle an additional, irrelevant task with high(er) priority and the total performance should be worse. Please do some poper (repated) A/B testing to proof these points. Otherwise I'm putting them into the "snake oil" category.

[@McFamily86]

You can put them in whatever category you want but I’ve A/B tested this a half dozen times with a 13700k / 4090 on a single screen and it absolutely causes my stuttering issue to be resolved. UPDATE: Just tested it 2 more times and 1000% power throttling of the UI causes stuttering on my system. Clearly visible in RTSS frametime and clearly repeatable.

[@NZSIMRACER]

I love this iracing game, but last night was the final sraw 3 races in a row down the drain because of this crap . If you're settings work tonight ill continue to play if not iam deleting i racing and going back to ps5 gran turismo 7 . Such bullshit there's no guidance from iracing on how to set up their game 🙄 they must lose a lot of players over this nonsense.

[@itshappening100]

i think they must did something wrong... it's so difficult to track, because everyone is making Updates (windows, nvidia, VR, iRacing, Steam VR), but I'm suspecting iRacing did something, because the game is unfkn playable lately

[@robcampbell6099]

Nah, the problem is your Intel cpu. I had similar issues for weeks after zero problems. Finally got tired of problem solving. Swapped out for a 7800x3d and problems have been gone since.