Smoke cause FPS drop

I'll keep it short.

Win10, 58X3D, 6950, 3440:1440. Drivers up to date. FPS is maxed out at 144Hz and it stays there.

But if the car spins in front, and there is smoke, FPS drops to 10FPS. I have the feeling like the game freezes. But then when I'm past the smoke, FPS goes to 144. Even if the car in front locks the tires during braking, FPS drops massively, but not so drastically.

What should I change? Which graphical settings are related to this.

 

Yeah, smoke really tanks the FPS. Lower the particle settings and test to see what works best for your system.

 

I don't understand why this happens. Flat 144FPS no drops. Even if I'm alone in Testing, if I hit the wall and smoke appears, FPS drops to 10 for a second. There is something wrong, but I can't figure it out.

 

Greetings.

My 2 cents here: Are you sure the smoke is the reason? I had some stuttering when having damage in the past when I used a slow hard disk. Basically when you get -visible- damage, the damaged 3d model must be loaded from disk, if you have a really slow disk weird things can happen. When I started playing AMS2 since it was not even in my top3 sims I had it installed in an external mechanical disk (!). Also, even with good storage something similar could be happening if there is a process in the background using the disk (some windows 10 security related daemon is famous for using 100% of the disk when doing some s%#t in some installations, for instance).

If you think this could be the reason try to reproduce your issue with disabled damage. If there is no fps drop, there you have a hint of where to start.

By reading your post, probably there is no damage, and my answer is not useful at all, but well, just in case...

 

Thanks for the idea. I have AMS2 installed on Samsung 990 PRO. There is no spike in CPU usage (on any core) when this happens. But I'll add SSD activity to the monitoring.

 

I too have this issue and had to lower the settings, tested with a replay where someone locked all the wheels and spun of , crossing the smoke dropped from 105fps (almost everything on ultra otherwise) to 20fps.

Density was set to LOW, detail however on HIGH , and the game ask you to restart after changing the particle detail, this is important , because setting it to low got me the same result until restarting the game.

Both settings on low now fps only dips from 105 to 85fps in the same spot.
(NOTE: when checking with a replay , rewind back long enough so the full smoke will be regenerated, otherwise it sometimes is removed from view and not really that what you "saw")

Did only notice this for tire smoke , not for the spray in the rain though, so something is a little more demanding there than on other effects?
Unfortunately the result looks like a 100% white wall and not that impressive in this case of full lockups

 

I think I found out. If you have FPS capped at your max monitor HZ, then maybe this is the cause of the problem.

In my case: I have LG, 21:9, curved. (I can't tell you the model number right now). I have the monitor set as rtings.com suggest. Max 144Hz. And I have frame limiter set at 143 FPS in AfterBurner/RivaTuner.

However, I was playing in Radeon Software, and I set 143 there, but I can't remember how.

With this settings, I was getting 143 FPS without a problem. 58X3D, 6950 at 3440:1440. It never dropped, it was rock solid. BUT. As soon as smoke appeared, in MSI Afterburner, I could see the drop. I felt it like the game froze for a moment.

Yesterday, I got Blue Screen of death, and Radeon settings all defaulted. I reinstalled (with DDU) everything (AMD chipset and AMD Radeon Software).

If I don't have FPS Limit anywhere, then when I see smoke in AMS2, nothing happens. The framerate graph does not tank, and I don't feel like the game froze on me.

I don't know which app was the problem, but I know one did. I don't know why the smoke was the problem, but now it works like a charm. FPS graph is flat, at 143FPS no matter what.