Losing a lot of FPS from 4th or 5th lap

[Billy Pilgrim]

I've had some races recently where I start the race (15 AI) with the FPS I'd expect (80 to 100 fps) and everything is fine for the first few laps but once I get to the 4th or 5th lap I start to lose a lot of frames - it goes down to around 60 and looks like I'm getting even fewer frames than that.

I don't understand what's up.

I use the latest Sol and have been using CSP's latest recommended version (1.46).

Any tips/knowledge would be appreciated.

 

[Insert Coin]

Perhaps your CPU and/or GPU is getting hotter and hotter? It might start to lower its frequency because of the heat. Start HWinfo64 to see what's going on.

 

[Billy Pilgrim]

Thanks for the tip.

I ran Heaven and checked the gpu temp - it was fine. But I don’t know if Heaven is hard work enough. I suppose it’s got to be as hard as Assetto Corsa on the gpu.

I did a race with Core Temp open to monitor temperatures in the cpu. The temps were fine too. But the above-mentioned problem did not arise during this race - my FPS remained good this time.

I wanted to run Prime95 to stress test the cpu but I’m getting an error message when I try to install it.

I’ll have a look at Hwinfo64 too, which I haven’t tried yet.

 

[pattikins]

It might be worth looking @ your vram & ram usage. Are you recording the race using AC's max quality & file size?

 

[dud]

I had the same for couple of weeks. I am locked at 60 Hz (max for my monitor) just fine and after a while AC stutters a bit and goes down to 30, and I mean precisely 30 fps. Exactly half.

It disappeared before I could fully debug it, but I suspect that some "helpful" program such as the rift VR software interfered based on some timeout after a game starts, or that some idiot program lost track of the fact that I am running a game since AC wasn't started by steam (I used CM).

If you have potential background programs such as VR software or trackir or whatever I would uninstall them for a test.

 

[Deleted member 197115]

Try to disable 3d clouds if you use them. There is possible memory leak with those.

 

[Billy Pilgrim]

It might be worth looking @ your vram & ram usage. Are you recording the race using AC's max quality & file size?

Thanks for the tip.
I'm not deliberately recording the race (except the default 2 minutes, or so, of replay, which I rarely watch). And I certainly haven't changed anything with regards to this for years.

 

[Billy Pilgrim]

Try to disable 3d clouds if you use them. There is possible memory leak with those.

I had wondered if that might have something to do with it as that is, as far as I can tell, one of the significant new changes.

 

[Jempy]

I'd add ... look if the ExtraFX is enabled ... that's one of the biggest fps eaters

 

[Billy Pilgrim]

I'd add ... look if the ExtraFX is enabled ... that's one of the biggest fps eaters

I'll check that out. Thanks for the tip. But I'm thinking it might not be that as that'd eat fps from the start, not from the 4th or 5th lap, don't you think?

 

[Billy Pilgrim]

Try to disable 3d clouds if you use them. There is possible memory leak with those.

I'm trying this out and will see what the results are.
I've noticed that 3D clouds make the reflections on cars very impressive so it is a pity to disable this. I'm hoping Sol and CSp might optimise this over time.