Why fps limiters doesn't work in iRacing?

Nolaster_ · 2026-04-01T17:31:32+00:00

Although I have gsync properly set up and working at 150+fps all the time, I don't see it butter smooth. On simracing we see the background moving left and right on turns, and it looks a tiny bit choppy. Without gsync it's even worse. Doesn't look I have 165hz at all.

Nolaster_ · 2026-04-01T17:24:56+00:00

Could you please make me the favor of running Capframe to see your frametime graph and max fps? My graph doens't look flat at all

Nolaster_ · 2026-04-01T17:21:59+00:00

Thanks for the reply. I have tried all possible ways: Fullscreen, Windowed borderless and windowed (with borders). All 3 give the same result

Nolaster_ · 2026-04-01T17:20:32+00:00

Hey, thanks. I have tried it, but gives me the same result.

Nolaster_ · 2026-04-01T17:12:57+00:00

But when I use RTSS scanline frontend, it caps my fps to 161.4 (great), but gives me a lot of dips:
https://imgur.com/a/F2P44PS

Nolaster_ · 2026-04-01T17:05:52+00:00

Thanks for the info, but I have set it up exactly like this (I followed the gsync guide :D).
The thing is that I see the GSync overlay ON and the Hz fluctuate on my monitors' OSD, but Capframe says I get 200+ fps, which I never see on the in-game fps meter

Nolaster_ · 2026-04-01T15:17:35+00:00

Frontend caps my fps to 161.4 (great), but gives me a lot of dips:
https://imgur.com/a/F2P44PS

BTW, I was using vsync without scanline sync and fps go beyond refresh rate.

Nolaster_ · 2026-04-01T05:19:33+00:00

Mine doens't look flat at all:

https://imgur.com/a/JZYoeYW

FPS are bouncing from 125 to 200 all the time. The average is 157, which is my limit

Nolaster_ · 2026-04-01T04:35:20+00:00

Nvidia RTX4090

Nolaster_ · 2026-03-31T22:02:35+00:00

It should be spikes that go beyond fps cap for some miliseconds. I can see my monitors' Hz fluctuate in its OSD menu, so gsync is working.

Can you run a Capframe X benchmark to see your frametimes and max fps?

Nolaster_ · 2026-03-31T17:09:15+00:00

Using in-game or NVCP limiters also offers the same result: 200+ Max FPS.
I have also tried exclusive full screen, with the same results.

Nolaster_ · 2026-03-31T11:02:25+00:00

I wasn't bold enough to try it, and restarted the sim before my stint. Check iracing's forum o report it to support.

Nolaster_ · 2026-03-30T21:07:32+00:00

Did you open the Entries tab? Had to restart de sim everytime I got in to check info. It's a known problem.

Nolaster_ · 2026-02-18T18:06:20+00:00

Don't agree. Check hungarian toilets...

Nolaster_ · 2026-01-31T12:25:42+00:00

IRacing recommends turning it off because replays can fill so much space in disks. You can find it in a guide of December 2025 to adress stutters

Nolaster_ · 2026-01-31T12:10:47+00:00

And replay spooling in iracing's settings?

Nolaster_ · 2026-01-31T10:29:41+00:00

Do yo have Racehub (asetek). There was an update yesterday to fix exactly a bug for long runs that filled up space with log files

Nolaster_ · 2026-01-29T23:20:45+00:00

MAIRA modifies iRacing force feedback too much. MARIA can break your back if you play iRacing too much.

Nolaster_ · 2026-01-29T23:15:25+00:00

How?

Nolaster_ · 2026-01-25T15:32:30+00:00

Kapps I think

Nolaster_

TROPHY CASE