Interactive rendering slows down.

[Naxos]

@Naxos - have you tried the Hotfix 1? It's different than the daily build. There are some fixes in it specifically for these kinds of problems.
https://www.chaos.com/corona/download

Problem is that my newest max files will not open if they are set to corona 13 and i have corona 12, will they ?

[skogskalle]

It is normal for the processor to be at 95 degrees. It works at the same temperature for me too. There is no problem with rendering during IR, but the system freezes. Sometimes the system shuts down completely. When it is turned off, the temperature is often around 80 degrees. If you use the bios at default setting you will see the difference.

The bios are at default settings. Dont think its good for the processor to be at 95 degrees.  If it gets hotter than 95 I think it starts to throttle which I believe is whats causing the freezing problems for me.  Again - by removing the side of the computer it lowered the temp by a couple of degrees and all the freezing/problems went away.  Not sure if this is connected to your problem or not, but the symptoms are similar.  I will return the computer to the store tomorrow so they can take a look at the cooling. Maybe they made a mistake when they put it together.
However, the problem only occurs when rendering corona in max. I have the latest hotfix installed. Latest win11 version. When running the corona benchmark there is no problem with temp or freezing, so maybe there is a problem with corona for max?

[fatherrain]

I don't know your situation. Of course, the processor does not always work at 95 degrees. When I have a freezing problem, the processor temperature is not very high. Everything is normal when EXPO is closed. There is no freezing at all when rendering normally.

[Quest]

It is normal for the processor to be at 95 degrees. It works at the same temperature for me too. There is no problem with rendering during IR, but the system freezes. Sometimes the system shuts down completely. When it is turned off, the temperature is often around 80 degrees. If you use the bios at default setting you will see the difference.

The bios are at default settings. Dont think its good for the processor to be at 95 degrees.  If it gets hotter than 95 I think it starts to throttle which I believe is whats causing the freezing problems for me.  Again - by removing the side of the computer it lowered the temp by a couple of degrees and all the freezing/problems went away.  Not sure if this is connected to your problem or not, but the symptoms are similar.  I will return the computer to the store tomorrow so they can take a look at the cooling. Maybe they made a mistake when they put it together.
However, the problem only occurs when rendering corona in max. I have the latest hotfix installed. Latest win11 version. When running the corona benchmark there is no problem with temp or freezing, so maybe there is a problem with corona for max?

1000% problem not in temps, and 1000% problem in microcode of something

[maru]

95C is the Tjmax of a 9950X so it definitely shouldn't be that hot. If removing your PC case panel and lowering the CPU temperature helps, then cooling is definitely the culprit.
Software cannot overheat a CPU. The cooling has to be efficient enough to cool down a CPU even under 100% load (which is what Corona does).

It seems that multiple people here are experiencing multiple different problems.

[Aram Avetisyan]

I wanted to write earlier, that the descriped behavior sounds like overheating issues, and here are my notes:

CPU is ok to push itself to 95% if it does not throttle. It can be so that even when CPU throttles, lowers the clock speeds to cool itself down, there is still not enough coolling and it just stays on 95%, just to keep working and to not bluescreen the machine.

Other users have already reported that v12 update 1 hotfix 1 has solved the lagginess issue(s) for them.

So, to make sure the issue is not v12 update 1 hotfix 1 related (or Corona related), please try earlier versions, specifically v11 or v10, if you can, or other CPU intensive workloads.
Earlier versions can be downloaded from: https://www.chaos.com/corona/3ds-max/download/old

[Naxos]

I wanted to write earlier, that the descriped behavior sounds like overheating issues, and here are my notes:

CPU is ok to push itself to 95% if it does not throttle. It can be so that even when CPU throttles, lowers the clock speeds to cool itself down, there is still not enough coolling and it just stays on 95%, just to keep working and to not bluescreen the machine.

Other users have already reported that v12 update 1 hotfix 1 has solved the lagginess issue(s) for them.

So, to make sure the issue is not v12 update 1 hotfix 1 related (or Corona related), please try earlier versions, specifically v11 or v10, if you can, or other CPU intensive workloads.
Earlier versions can be downloaded from: https://www.chaos.com/corona/3ds-max/download/old

I'm not ready to test hotfix for Corona12, as i've installed Coroan 13 daily build, and my current files are now set to Corona 13.
If i go "back" to Corona 12, they will complain about it uppon opening of scenes , right ?

[maru]

It should work, but we cannot guarantee that, sorry.

[TomG]

Note that older versions of Corona can open files saved with newer versions if no features used in the saved scene have been updated. For example, Corona 12 files won't open in earlier versions of Corona due to changes in the tone mapping (addition of auto white balance and auto exposure) so when a Corona Camera is in the scene, it has the data for those new tone mapping features, and Corona 11 etc. doesn't know what to do with that data so can't open the scene. This will allow you to make a good guess as to whether a scene saved in a newer version will open in an older.

[Quest]

I wanted to write earlier, that the descriped behavior sounds like overheating issues, and here are my notes:

CPU is ok to push itself to 95% if it does not throttle. It can be so that even when CPU throttles, lowers the clock speeds to cool itself down, there is still not enough coolling and it just stays on 95%, just to keep working and to not bluescreen the machine.

Other users have already reported that v12 update 1 hotfix 1 has solved the lagginess issue(s) for them.

So, to make sure the issue is not v12 update 1 hotfix 1 related (or Corona related), please try earlier versions, specifically v11 or v10, if you can, or other CPU intensive workloads.
Earlier versions can be downloaded from: https://www.chaos.com/corona/3ds-max/download/old

Hello, on the previous page I gave information based on tests of 4 and already 5 computers, I also attached a video from one, there is a connection between all this, namely Ryzen 9950 and the latest updates of Corona (and possibly in BIOS and Windows), but what exactly the problem is is not yet clear
p.s

5th PC has windows 23h2 222631, no expo on, same motherboard same bios as on others. Corona 12.1. No shutters or so

in a week there will be bios and drivers update related to 9950 ryzen will update info after

[Naxos]

Note that older versions of Corona can open files saved with newer versions if no features used in the saved scene have been updated. For example, Corona 12 files won't open in earlier versions of Corona due to changes in the tone mapping (addition of auto white balance and auto exposure) so when a Corona Camera is in the scene, it has the data for those new tone mapping features, and Corona 11 etc. doesn't know what to do with that data so can't open the scene. This will allow you to make a good guess as to whether a scene saved in a newer version will open in an older.

Ok, i'll not try so. Have we any eta idea for Corona 13 ?

[TomG]

Corona 13 will be in June. Corona 12 Update 2 will be before that, though, set for end of March at the moment.

[skogskalle]

95C is the Tjmax of a 9950X so it definitely shouldn't be that hot. If removing your PC case panel and lowering the CPU temperature helps, then cooling is definitely the culprit.
Software cannot overheat a CPU. The cooling has to be efficient enough to cool down a CPU even under 100% load (which is what Corona does).

It seems that multiple people here are experiencing multiple different problems.

Yeah sorry, mine is probably not related to the original issue here. I brought the computer back to the store today and they ran some stresstest of the cpu and the temp went up towards 95 after only a couple of minutes, and the temp dropped quickly when they removed the side of the computer.  I guess they will try to get the temp under control with better fans/cooling and we ll see what happens... 
I thought it was strange that I could run the corona benchmark without problems, but maybe it just didnt last long enough for the temperature to spike...

[Quest]

I don't know your situation. Of course, the processor does not always work at 95 degrees. When I have a freezing problem, the processor temperature is not very high. Everything is normal when EXPO is closed. There is no freezing at all when rendering normally.

Any update?

Another new build win 23h2, 9950x, 64 gb ram, expo off. No lags or frezzes (Corona 12.1)

I have big feel that main problem is in windows 24h2. They did something that boost games and not redner)

[maru]

Any update?

Another new build win 23h2, 9950x, 64 gb ram, expo off. No lags or frezzes

I have big feel that main problem is in windows 24h2. They did something that boost games and not redner)

What exactly do you mean by "another new build"?