Interactive rendering slows down.

[fatherrain]

Hello
I bought a new computer. I installed a new operating system and updated all drivers including bios. I installed 3dsMax 2025 and Corona 12. I didn't install any scripts. I opened a new file and placed a very simple plane and cube. I added some simple sky lighting. I had no problems while rendering. But when I ran the interactive view, everything changed. I can hardly do anything. I can't even switch between commands. My computer is getting very bulky. It became very difficult to switch between scenes, change materials, and move objects. I did a lot of hardware testing. I did not encounter any hardware errors. I share with you my system properties and the screenshot of the scene. I communicate using Google Translate. I hope I was able to convey the problem clearly. I hope I wrote my problem in the right place. Thanks.

ASUS PROART X870E-CREATOR WIFI
AMD Ryzen 9950X
ASUS PROART-RTX4070TIS
G.Skill Trident Z5 Neo 2x32gb
Crucial T705 2TB

[fatherrain]

When I followed the instructions mentioned in the link, my problem was solved for now. I hope it doesn't continue later. A simple setting is required under Windows. If there are other performance settings for 3dsMax, I would be happy if you let me know or recommend an article for me to read.

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-force-your-laptop-to-Run-with-Graphics-Processor-vs-the-default-Integrated-Graphics-for-InfraWorks.html

[maru]

That's strange, because Corona does not use GPU in any way (only for AI denoising, but it shouldn't affect performance much and I can see that you are not using denoising). Are you getting correct scores from Corona Benchmark? https://www.chaos.com/corona/benchmark

[fatherrain]

Scored 14 193 420. The highest score on this processor is 17 479 094. What do you think?

[dzintas]

Scored 14 193 420. The highest score on this processor is 17 479 094. What do you think?

Top places usually are from overclocked cpus. They could be unstable for daily use, but good enough just to get high score.
Well yours seems a bit slow either way. Gamers nexus got all cores up to 5ghz during their testing.
Did you enabled core parking? And maybe you're being thermally limited or power limited.
Still your score aren't that bad compared to scores that go up to 5ghz.

[fatherrain]

I checked it with the Unpark CPU application. Cores are open. I set the system to high performance setting. There was no change. I am using Proart LC420 liquid cooling in the system and I just changed the paste. CPU running at 95 degrees. I want to make the most appropriate settings for Corona. Is there a guide regarding the settings I should look at in the system and hardware? That is, bios, operating system, driver, armory crate etc. Where can I learn these things that we say should not be skipped?

[dzintas]

Couple of things. If I'm not mistaken your specific cpu requires core parking to be enabled. But maybe someone has more insight on this with your specific cpu.
Other thing, if your cpu is hitting 95 degrees, and you're getting around 4.6ghz. That means your cpu is thermal throttling and there is something weird with your setup.

Going back to original topic about pc slow downs during interactive rendering. Try disabling fast preview denoising, it's usually on by default. It uses gpu, and high gpu usage can make pc sluggish.

[fatherrain]

I regret using liquid cooling. I wish I had bought a tower cooler. I will look into the thermal issue. When I disabled the GPU for interactive rendering, not much had changed. The real improvement happened when I set the high performance setting for 3dsmax in the graphics section under Windows. Before, I could not perform any operations while IR was on. My current problem is, first of all, the IR startup takes about 1 minute. Secondly, there is a slowdown when the material editor is open. No slowdown on main screen during IR. But I can't even set coronasky when ME is open. There is no problem during normal rendering.

[tatarka]

For quick test, try to run test with one stick 32gb ram.

[fatherrain]

My problem still persists. I can't work during interactive rendering. :( Please help, what could be the problem?

[Avi]

is your RAM running with its rated speed? For example: DDR5 - 6000 Mhz?

Just to confirm, single ram stick test as advised above did not solve your issue?

I would double check your ram configuration and your cooler installation according to the motherboard instructions.

[fatherrain]

Thank you for your help. I couldn't reply for a while to make sure the system was working stably. Focusing on the RAM issue solved my problem. My RAMs are 6000mhz expo. I have a problem when I open expo from the bios. There is no problem with the default settings. I don't know why expo is causing such a problem. I don't know if this problem is common with expo RAMs or if my RAMs are faulty. If anyone has information on the subject and can inform me, I would be very happy.

[maru]

So if you disable the expo option everything is fine? Are you also getting the expected performance? (e.g. from the Corona benchmark)

[fatherrain]

I was getting 14,193,420 points in the corona 10 benchmark test, now I am getting 14,232,367 points. I continue to use EXPO with it closed. When I open EXPO, the slowdown I mentioned occurs. I couldn't find the solution. I will continue like this from now on.

[Naxos]

Hi, didyou solved thios problem ?
I have exactly the same issue, and (not 100% sure) i think it started with Windows 11 24H2 upgrade...