CPU Usage up, GPU usage down results in worse performance.

Any issues, problems or troubleshooting topics related to the Prepar3D client application.
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TextRich
Posts: 20
Joined: Tue Jun 15, 2021 12:12 pm

Re: CPU Usage up, GPU usage down results in worse performance.

Post by TextRich »

Ray Proudfoot wrote: Sat Jun 19, 2021 11:29 am TextRich, the i5 is the reason you're stuck at 100%. P3D really benefits from an i7 or faster.

Try adjusting your settings if you want to keep cpu0 below 100%. I found that when it was hit there would be a drop in performance albeit briefly. 100% on either the CPU or GPU means the hardware cannot deliver what you're asking in your settings.
Thank you. I deleted my reply because I realized your issue in the very first place was usage in CPU1 when you did not want too much usage there. But yeah, it looks like my i5 can't keep CPU0 below 100%. Trust me, I turned down everything. I guess it is just the way v5.2 has been programmed, but at least I'm happy with the overall sim performance.
Sim: CH Yoke/Throttle/Pedals, Airbus stick, Cessna trim wheel, TrackIR 5, 3 Saitek panels, ButtKicker

System: Intel i5-10600K CPU @ 4.10 GHz, Nvidia GeForce RTX 2080 Ti, 64GB DDR4 RAM 4200 MHz, ASRock Z490M Pro4, 2TB Intel NVMe SSD 660p, 3 monitors
Saldo
Posts: 420
Joined: Thu Sep 18, 2014 7:26 am

Re: CPU Usage up, GPU usage down results in worse performance.

Post by Saldo »

With my 14 core 7940X I am also using an AM like I do for years. But v5.2 puts about 5-10% more load on the main thread core and 30-40% more load on the terrain cores.
My 3090 has a load drop of almost 20%z

This is compared to v5.1 with the same settings…
So I use more load on the CPU and less on the GPU.

And SteveS has helped me too a lot over the years with AM and my systems..
vadriver
Posts: 8
Joined: Sat Jul 29, 2017 5:17 am

Re: CPU Usage up, GPU usage down results in worse performance.

Post by vadriver »

Ray Proudfoot wrote: Sat Jun 19, 2021 11:13 am I have resolved the problem
Ray

How was the GPU load ...... less than 5.1 ?
cheers
john
downunda
Ray Proudfoot
Posts: 168
Joined: Thu May 18, 2017 8:19 am

Re: CPU Usage up, GPU usage down results in worse performance.

Post by Ray Proudfoot »

vadriver wrote: Sat Jun 19, 2021 11:03 pm Ray
How was the GPU load ...... less than 5.1 ?
Probably. Around 25-30% with EA disabled but rising to 60-70% with it on. But I prefer the look of the skies with it off and Active Sky and ASCA running.
Ray (Cheshire, England).

System: P3D v5.2HF1, Samsung 970 EVO M.2 SSD, 1Tb Samsung 860 EVO SSD, Asus Prime Z370-A mobo, Intel i7-8086K o/c to 4.6GHz, 32Gb G.Skill DDR4 3000Mhz RAM, Nvidia GTX 1080 Ti 11Gb, Win 10 Pro 64-bit, BenQ 32” UHD monitor.
hermes82
Posts: 381
Joined: Mon Jun 25, 2012 3:05 pm

Re: CPU Usage up, GPU usage down results in worse performance.

Post by hermes82 »

ok it's an old fix but either disable core 0 in task manager or process laso if you have it then once in the sim enable it again, it gives a nice even spread across all cores and smooth as silk after
Ray Proudfoot
Posts: 168
Joined: Thu May 18, 2017 8:19 am

Re: CPU Usage up, GPU usage down results in worse performance.

Post by Ray Proudfoot »

%hermes82, thanks for the suggestion but as I have things now is fine for me. Cores 0 2 4 6 8 and 10 give me excellent results.
Ray (Cheshire, England).

System: P3D v5.2HF1, Samsung 970 EVO M.2 SSD, 1Tb Samsung 860 EVO SSD, Asus Prime Z370-A mobo, Intel i7-8086K o/c to 4.6GHz, 32Gb G.Skill DDR4 3000Mhz RAM, Nvidia GTX 1080 Ti 11Gb, Win 10 Pro 64-bit, BenQ 32” UHD monitor.
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