very high CPU temperature during noise reduction with lightroom 14.2

[Gérard26300594ntv5]

Hello,

My CPU temperature easily rises to 95°C and then cools down again thanks to the fan. When I batch process 10, 20, or 40 photos, the same thing happens when exporting these photos to jpg files, and the process slows down considerably.

Hardware acceleration is enabled in both Lightroom and Photoshop. I have the latest NVIDIA graphics driver 572.83, completely cleaned of all unnecessary items using NVCleanstall.

I should also point out that I have an HP Omen PC with an i7 12700, and I know it's not as good in terms of cooling performance as a PC that has been rebuilt (my CPU fan is 92 mm, meh). But this problem is new, so is this the beginning of a technical problem for me, or is it a bug in Lightroom version 14.2? I would be very grateful to know if I'm alone in this situation or if others have already encountered this problem.

Have a good evening and a good day everyone, and thank you for your feedback.

[dj_paige]

My CPU temperature easily rises to 95°C and then cools down again thanks to the fan. When I batch process 10, 20, or 40 photos, the same thing happens when exporting these photos to jpg files, and the process slows down considerably.

This happens because you have asked the computer to a large amount of work, which generates heat, and can cause the PC to "throttle" (slow down) so it doesn't overheat. This could be cause the cooling system isn't working properly. You need to make sure all vents are vaccuumed out and not blocked by dust. Make sure that the vents are not blocked by furniture or walls. If you can open the case, then also make sure there is no dust build-up there and that all fans (if any) are working. (I'm not really familiar with an HP Omen) Another thing you can try is a laptop cooling device (example)

[Gérard26300594ntv5]

Hello dj_paige,

Thanks for your feedback, but unfortunately the dust issue has already been investigated, and I vacuumed up what little there was.

My problem really stems from the PC overheating since the new version of Lightroom 14.2: do you also use noise reduction in batches of images (20, 30, 40) and did you notice any CPU overheating? (Or the PC fans were making more noise by spinning much faster: I should point out that this has been happening since I upgraded to Lightroom Classic 14.2).

If I could have your feedback on this point it would be really nice, have a good day.

[dj_paige]

So its not dust, but it is still overheating caused by intensive use of the CPU and/or GPU and a failure of some part of the cooling system (such as fans are not blowing, vents blocked by furniture or wall, and other possibilities). This is how computers work, and I would have told you this 20 years ago, long before LrC 14.2 existed. Also, there have been some problems reported regularly with 14.2, but overheating is not one of them, you are the first I can remember to report this, all other 14.2 users who perform noise reduction in batches (like me) do not have overheating problems.

You need to monitor the heat using a temperature utility as suggested by @johnrellis , and try to find other causes that makes the cooling system fail.

[johnrellis]

Denoise and export use the CPU and GPU intensively, especially the GPU.  It's not unusual for CPU/GPU temperature to go very high during such operations.  But if your cooling system is not working properly (e.g. because it's clogged with dust), then the CPU firmware can reduce the clock speed considerably until the temperature drops, and you'll observe LR proceed more slowly. So things to check:

- Vacuum out the interior, paying attention to the fan and the vents.

- Use a temperature utility that shows you the clock speed -- is it getting dropped when the temperature goes high?

[Gérard26300594ntv5]

Hello johnrellis,

First of all, thank you for your feedback.

Regarding the dust, I've already taken the necessary steps, and my problem has been occurring particularly since Lightroom Classic 14.2.

And indeed, the clock speed decreases as the temperature increases (checked with HWMonitor).

This temperature also increases significantly when I export a batch of photos from raw to JPG, particularly since the new version of LRC 14.2. Have you also noticed this phenomenon with this same version of LRC?

Thank you again for your help, and it would be very helpful if I could know how it works elsewhere (batch noise reduction and the same for exporting from raw to JPG).

A very nice day for you.

[Ian Lyons]

Please provide a copy of your Lightroom Classic 'System Info'. You can obtain this via the Help > System Info menu item.  System Info will give us a much more detailed description of your hardware along with driver information, etc

Note that the System Info window includes a Copy button. Use this to copy the information, then paste into a forum post. 

[Gérard26300594ntv5]

Hello Ian Lyons,

Thank you for your help, and here is the requested file.

Sincerely,

[Ian Lyons]

There's a slighty (approximately 10 days) newer driver for your GPU that  you might wish to install. That being said, it probably won't make much, if any, difference to the tempatures you're seeing.

As others have indicated Denoise will push the CPU and GPU hard, especially when batching files.  If the ventilation ducts are clear and the fan is cooling harward, then all seems fine.

[Gérard26300594ntv5]

Hello,

Thanks to everyone who contributed, we've covered all the solutions: dust, the NVIDIA driver... except maybe the LRC version, but you'll see, it's not very important.

I've tried a lot of things (vacuuming the dust, reinstalling the new NVIDIA driver without telemetry, clearing the cache in LRC), and I don't know how it works, but I retested and, surprisingly, there's no excessive overheating; the CPU and GPU temperatures reach a maximum of 65°C, which is completely normal (I didn't test with 100 photos, but rather with 20).

There's just a rather significant discrepancy between the advertised duration (3 seconds) for noise reduction per photo, which is actually more like 8 seconds: I'd just like your feedback on this last point.

Good afternoon everyone and thank you again for your feedback, best regards

[dj_paige]

There's just a rather significant discrepancy between the advertised duration (3 seconds) for noise reduction per photo, which is actually more like 8 seconds

Advertised? Where did you see that?

And how big (in megapixels not megabytes) are the original RAWs that you are de-noising?

[Gérard26300594ntv5]

My raw files are 30 MB and I am attaching a copy of the window in question in LrC: when you do this at home, how long does it take to reduce the noise of an image in announced time and real time?

[dj_paige]

I can't see your file attachments (or anyone's file attachments). Please use the "Insert Photos" icon to include screen captures in your replies.

[Gérard26300594ntv5]

[Ian Lyons]

The information displayed on that dialog is an approximation. 

[Gérard26300594ntv5]

So everything seems normal?

I have an i7 12700 and an RTX 3070, and the effective duration of noise reduction per frame is 8 seconds. How long does it last for you?

[Ian Lyons]

Yes, all appears to be normal. 

8 seconds is much faster than many users. So, I really would not be concerned about it.

[Gérard26300594ntv5]

Ian Lyons,

Veru thank you

[Ian Lyons · Accepted solution]

I forgot to answer your question "How long does it last for you?"

Using my Apple MacBook Pro M3 max, denoising a Canon EOS R6 MkII (24MP) file is estimated to take 9 seconds whereas it actually takes 13 seconds. Using the same computer, a Canon EOS R5 (45MP) file is estimated to take 15 seconds whereas it actually takes 19 seconds.

Note that my figures are based on megapixels not megabytes, hence denoise appearing to take signicantly lomger than your example.

[Gérard26300594ntv5]

Perfect then. I can't determine what put things back in order for me, but the PC's Omen Gaming Hub program (PS: HP program), which provides all the CPU, GPU, and RAM usage metrics, as well as fans and temperatures, now tells me that the GPU is working much harder when extracting RAW to JPG or reducing file noise.

If you have these timings with an M3, it's normal that I have similar ones.

Thank you so much for all this sharing; it helped me a lot, and I'm out of trouble.

Good evening