ACC Graphics and Performance Discussion

did you read the post I have posted......it explains all. it's not disk access, it's CPU bottleneck....the Highest framerate you want, the more it will push on the CPU....with 1080TI, it was the limit, GPU limited, but with more powerfull, you can see that the limit is no more GPU, but CPU.....only alone wihtout AI, you have the GPU bottleneck....

 

Yes: what is the bottleneck? The cpu single thread speed? Or the AI code itself?

 

Ok so from what you are saying, the bottleneck is the AI code execution, right?
Does the AI run in a single thread? Is that single thread maxed out? I will run my own tests of course but that's what I'm interested in finding out, because there's no point in having a 16 core CPU if all you need is an overclock, but if even an overclock doesn't buy an equivalent gain in performance, then there must be another issue (e.g. deadlock? critical sections of code?)

 

I will be very happy if you can max the GPU, but the more I overclock the CPU, the more I raise the GPU usage...

 

But if none of the cores/threads are at (or near) 100%, how can it be a CPU bottleneck? Anything below 100% and there’s still capacity left in the CPU - it can work harder but the code isn’t asking it to. It’s only a CPU bottleneck if the CPU is maxed out and can’t keep up with the demand.

 

https://forum.studio-397.com/index.php?threads/low-gpu-usage.59874/page-3#post-990010
read the post and see how the GPU usage decreases, even if the CPU is not maxed, it's called CPU Bottleneck. Same here, with zero AI, the GPU is maxed, and the more you add AI, the more the GPU usage decreases, even if the CPU is not maxed. The more I Ooverclock the CPU the more the GPU usage increase. If I delid + water cool the i9 9900K, maybe I can go to 5.5ghz and increase the GPU usage. But I prefer waiting for the next gen CPU...

here the same result with DX9 and raceroom
https://forum.sector3studios.com/in...y-ai-before-fps-drop.13273/page-2#post-181152

 

@Koly™ - sorry if you mentioned it earlier, but what resolution are you running at? I have a 6700k and a GTX 1080 running at 1440p with mostly epic or high settings. I've just tried a quick race with 20 opponents and Afterburner shows my CPU main thread running at 80-95% and my GPU at 85-99%. All smooth, stutter-free. In practice, the CPU drops slightly along with the GPU but only about 5-10%.

 

1440p,
with 1080ti, my GPU were maxed everytime...it's the GPU bottleneck, so with your gtx 1080 is the same.....now with 2080ti, I have +35fps, but the GPU is not maxed, seems there is spare GPU power....due to CPU bottleneck...
at 4K, the 2080ti is maxed everytime, it's the GPU limit.
with the new 3080ti which will come soon, I hope we will have better than the i9 10900K....cause I don't know what I will gain with a new GPU, the 3080ti....maybe only resolution scale forced....but the same framerate....

AMS2 or Project cars 2 dont have the CPU bottleneck, the GPU is maxed everytime.

 

1440p,custom settings (almost EPIC), alone without AI, Bathurst, light rain, headlights on, GPU maxed, 194 FPS. NO CPU BOTTLENECK

 

10 AI, no CPU bottleneck



15 AI, the CPU bottleneck starts, the GPU usage drops to 93%, then with more AI, the GPU usage will decrease.

 

I once determined the CPU bottleneck threshold the same way for an i5 7600k. It was like 9 cars.

It gets better once the field spreads out.

 

I’m struggling to understand how adding a better GPU to your existing CPU/system can make the framerates go down. I can see how the load on the new GPU would be less but that shouldn’t somehow limit the performance of your processor. Your CPU is almost certainly stopping the new GPU reaching its full potential but it shouldn’t be suffering as a result. I seem to be getting much better performance than you with lower-spec hardware which doesn’t make any sense. Both of my components (CPU and GPU) are running near max performance which is the ideal situation.

 

It's not down....i have +35 fps.... and alone i have 197fps at Epic when gpu is maxed

 

Ah, sorry, misread your post.

 

It's UE4 the problem i guess....unlike AMS2 or pCars2....it's too much CPU demanding....but it's much more beauty....I have saved so much money that I will buy the 3080ti and the i9 10900k at day one....(the future buyer of my used i9 9900k/2080ti will be lucky) but be sure i will update and post the difference

 

Hello everyone,
Long time AC player and now looking to move over to ACC. My old PC died which I bought in 2010 and I am so out of touch with PC specs and what will be good enough to run ACC so I am just after some advice. I will be mostly running against the AI with about 22 AI cars (more AI the better if possible) but I will be wanting to run with dynamic weather, especially rain etc. and I will want it look pretty good as well. I've read this entire thread and have come to these spec,

CPU: AMD Ryzen 7 3700X 3.6GHz
RAM: 16GB DDR4 3000MHz
Graphics GeForce: RTX 2070 SUPER 8GB

Or

CPU: Intel Core i7 9700F 3GHz
RAM: 16GB DDR4 3200MHz
Graphics: GeForce RTX 2070 SUPER 8GB

As for monitor, I was going use just 1 x 27" monitor probably running at either 1920 x 1080 or 2650 x 1440.

Will these specs be enough or will I need even more? Am I heading the right direction with the monitor or will I need even higher resolution?

Sorry for the noob question, as I say, my last PC I bought is 2010 and things have moved on so much since then.

 

Both are good, I prefer the Ryzen build, but with faster memory. The Ryzens profit from that, so minimum 3200 I would say. You'll be fine with this system at 1440p. And online is more fun, but that is your business. ;-)

 

Hi Linus,

nearly same happened 8 weeks ago - old 2011 pc in trouble - new one in my signatur - its so much fun. go for amd.
have fun with mor fps (now AC is dead for me - i am acc junkie, the deeper i get into it, the more fun. crazy stuff)

 

That's sissydriver and Sofa for your help, looks like I'm sorted

 

hi linus,

https://www.cpubenchmark.net/high_end_cpus.html

https://www.cpubenchmark.net/compare/AMD-Ryzen-7-3700X-vs-Intel-i7-9700F/3485vs3465

https://cpu.userbenchmark.com/Compare/Intel-Core-i7-9700F-vs-AMD-Ryzen-7-3700X/m816132vs4043