Just an afterthought - A year or two back my PSU was on its last legs and getting mightly hot.  This was causing a massive heat build up inside the case making both CPU and GPU run hotter as a result.  May be worth just putting your hand on your PSU and see if the same thing is happening - Just a long shot, I know, but worth checking.

Nobody else is reporting an issue since SU5, so I think you can safely discount that and so I don't think you are going to gain anything from a reinstall (though strange things can happen with computers and flight simulators, I know)

Thanks, but all seems to be fine temps-wise with the desktop. And wouldn't be a sheer coincidence if the day before updating to SU5 all was fine and right after the time I fired up FS2024 and SU5 all went haywire? Good thinking, though, but fortunately it is not the PSU that is acting up here.

I exclusively use the Fenix aircraft so I for once tried one of the stock airbuses to eliminate the idea that it might be the Fenix aircraft that are to blame. No cigar, also the stock A320 is cooking 🙂 

There is another user in this very thread who also is experiencing these high temperatures. Anyway, I will reinstall FS2024 as soon as I know how to do so without having to sit and wait for hours to see the installation running.

As far as I remember from the last Developer Stream they said that previously they saw user complaints that the GPU has so little to do and the main thread gets hammered. So the goal was to even things out and make more use of the GPU's power. 

I'd say it running hotter follows this. If the GPU no longer sits below 50% it will run hotter.

Just now, Farlis said:

As far as I remember from the last Developer Stream they said that previously they saw user complaints that the GPU has so little to do and the main thread gets hammered. So the goal was to even things out and make more use of the GPU's power. 

I'd say it running hotter follows this. If the GPU no longer sits below 50% it will run hotter.

Yes, I understand, but going as hot as almost blowing up the GPU is a bit too much.

In the meantime I saw in the Discord channel of Fenix that more users are running into this problem.

1 hour ago, hvw said:

Yes, I understand, but going as hot as almost blowing up the GPU is a bit too much.

But that's the thing - an application should be able to use every last bit of performance the GPU has to give without the GPU overheating. You paid for the whole GPU, so you should be able to use the whole GPU.

Maybe another point: You're saying it's "almost blowing up the GPU", but as long as the temperature is within limits, we'll, it's within limits. It's really just an indication that you're running your GPU hard, but not too hard. A lot of the focus in SU5 was on performance, so it's not surprising to me that some people are seeing MSFS utilize their GPU better and, hence, running it hotter.

5 hours ago, Lange_666 said:

Dealing with the same thing. CPU "AND" GPU run quite a bit hotter than pre SU5 and this with the same settings. Noticed it by the sound of my ventilators which went up, only then I checked temps which confirmed why.
Running a 3080Ti with updated thermal pads.

A year or 2 ago same thing happened in DCS, after an update things ran hotter, needed to wait for another update to go back to normal (or what it was before). Checked DCS after running a hotter SU5 flight and there the temps where as before so it's certainly not the PC.  

 I just quote myself so people who think all of a sudden the PC or PSU or whatever it the problem can read it again. The above says it's not because if it was the same would apply to running DCS also.

If the problem came from SU5, logic would dictate that all users who use the same addons as you would be affected by this problem, but that’s not the case, so it’s a problem that isn’t directly related to SU5. 
Did you try anything other than the Fenix and were able to reproduce your temperature problem?

I have had my computer shut down during flights for about 3 days. I have core temp running and the cpu goes into the 80's. Because I had gotten those gpu warning pop ups, I believed the computer was shut down when the gpu was stressed.

I uninstalled that mod that gave lower spec Nvidia cards the ability to run 4X Frame Gen. And the problem has not returned. The 4x Frame Gen mod is enabled by simply dropping a .dll file called version.dll into the same folder location as    FlightSimulator2024.exe

I do believe su5 is stressing gpu's. I believe the only cure is going to be reducing visual settings. I did that by ditching the 4x fg mod. 

So instead of a performance increase it's the opposite. More power needed for the same visuals. And that is what I experience. 

Do GPUs typically have throttling to reduce clock speed to keep temperatures within range? I’d hope they’d have a way to protect themselves from getting to temperatures that were going to damage the hardware. Just curious. 

8 hours ago, hvw said:

Happy for you 🙂 But as stated, mine are unacceptable and would love to find out why this is.

it will be your GPU and not MSFS2024 causing high temps

Check if the upgrade enabled graphics settings you hadn't that high before, or Dlefault  Traffic both on ground and in the air... 

5 hours ago, hvw said:

Yes, I understand, but going as hot as almost blowing up the GPU is a bit too much.

In the meantime I saw in the Discord channel of Fenix that more users are running into this problem.

There's absolutely no need to worry about your GPU blowing up. If it gets close to its maximum safe operating temperature, the GPU will throttle so that it doesn't get hotter than it should. You will lose some performance if that happens, but your GPU won't be damaged. 

1 hour ago, Alistair Logie said:

Do GPUs typically have throttling to reduce clock speed to keep temperatures within range? I’d hope they’d have a way to protect themselves from getting to temperatures that were going to damage the hardware. Just curious. 

Yes, they certainly do. 

Most people (including me) are probably ultimately CPU limited in MSFS 2024, which means your GPU won't be running at full speed all the time. If SU5 has improved efficiency you would probably see a bit more GPU utilization, which results in higher temperatures. I have noticed this myself, the CPU is absolutely more effective in SU5 but it is still the bottleneck in my system too.

Your GPU will throttle down before this really becomes a problem, and GPU temperatures close to the max of an older card like the 3070 isn't that strange. The thermal paste may be degraded, and/or the fans are tired from years of use. But it will throttle down and won't be damaged if you approach the max temps.