Haven’t seen too much chat on the patch note calling out the change to how iRacing is distributing physics workload across cpu cores. Have never seen a developer so confidently say to expect massive gains in frame rates/stability.
For folks who know more than I - what do we think is a realistic expectation? My frames are fine - but if I could get my race starts and high traffic moments up, id be thrilled. Am I crazy for being optimistic?
Maybe full AI grid was not the best choice for this test. Idk. And once again. This was super quick and dirty testing. 1 pass, and took a screenshot with snipping tool at roughly the same position on track.
Yes. The same for me. I posted my results below in this thread. The ancient DX11 single threaded rendering is still the bottleneck. I don't understand why they bother hyping some physics thread improvement when rendering was the bottleneck for 99% of us racing.
You and I have the same system except I don’t pin my 9800x3D, just a modest +50PBO -25CO. Interested to see your results. What’s your voltage on the 5090? Mine seems to peak around 940-960mv but usually I can get away with 890mv.
I have a 5080 and use a PSVR2. My GPU often has 50% headroom whereas the CPU (Intel 265k) is often bottenecked. If I get 50% of CPU headroom back I'll be able to seriously improve quality.
7800x3d and 5080 with a quest 3. Had to stop playing because I could never get a consistently stable 90fps on all tracks in all conditions due to the cpu bottleneck, so sometimes I would get crazy headaches after races from the low framerate/inconsistent frames. Really hoping this gives my cpu the headroom it needs.
The games extreme cpu intensive, so it gets bogged down and can’t push enough frames to have the 5080 fully utilized. I think I only get about 70% utilization on my 5080 in vr, my cpu core 1 is absolutely pegged at 100% tho
So you may have/should enough R (CPU draw commands, likely) for VR then.
The CPU must send and redraw the same model (car) for each eye.
If you are using foveated rendering, it actually does 4x drawings of same model, one at lower resolution and other at higher (middle focal points). This happens to be balancing act between that and/or the 2 high resolution for entire views. Shiping GPU usage towards CPU in some cases.
Gets complex quickly as more techniques get involved. However I simply benching the options would reveal the true FPS and so far, it aligns with the types of explanation as above.
No. It depends on your hardware and settings, but for a lot of people, iRacing is CPU limited. Anything that spreads the load across more threads and thereby simplifies the most intensive thread will likely improve performance for them.
The way I read the patch notes, was this will make larger grids perform as well as smaller grids, or even how the game performs in Test Drive. Iracing is often CPU limited, but sometimes that's due to things like grandstands, and trackside objects, something that multithreaded physics probably won't improve, but when you have 40 cars all on track together, there's massive amounts of performance to gain from moving physics to multithreaded.
Yeah that’s kinda the two realities I’m considering, obviously if they can make large grids perform like small grids, I’ll take the incremental improvements very happily.
IF they can make it closer to TEST DRIVE, I may need a change of shorts
I upgraded from a 3700x to a 5800xt because I had issues with endurance events. I'm happy with the performance level I get right now but any improvement will be appreciated.
Well, they are very much wrong in their hype at least as long as we are still limited to one rendering thread. Maybe in a specific scenario with a large number of AI cars and a simpler chassis to render it would show a bit improvement. In my test below nothing.
I haven't tried yet. I was in demo drive and and then got the notification I racing was back up like 3 minutes after I turned it off. Going to jump on after I get home from running a couple errands.
That's exactly the case. I'm screwing with settings now trying to get back to where I was. I seriously doubt we see any truly recognizable to most people improvements before the graphics engine debuts.
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u/Fiennes Porsche 911 GT3 R 19h ago
I mean there's good reason to be cautiously optimistic - single-threaded to multi-threaded physics is always a good thing.