PS5 Fan reaching Max Speed on Jungle Maps - I think I know the cause.

Hi guys, so I made an account just to post this. I have been mainly making posts on Reddit, with little success or support. It's a very long post, but I am hoping the devs will take the time to read it and we can hopefully get some resolution.

Basically, from the first day I started playing this game on my PS5, at seemingly random times, the fan in my console would reach extremely high speeds. It revs up to a level equal that of my launch PS4. At first I thought, oh no, my launch day PS5 has finally got a bit dusty. So I took it apart and cleaned it out, but it was pretty much spotless anyway.

Still though, the problem persisted. I first noticed it on campaign (Pensylvania map). Then it went away after that. Why? Because I moved on to a different biome/map. I noticed it next when I started Chaos Theory (JP1), and again on JP3. The fan would periodically go haywire, and I couldn't explain it, so I started doing tests.

First of all, I went back to other games, heavy hitting games such as Death Stranding and Ghost of Tsushima, to make sure it wasn't my console. It wasn't. I can happily play other games for huge gaming sessions and my consoles fan will remain consistent as always, even when my room was very hot.

Then, from a cold console boot, I load my JWE2 Isla Nublar Chaos Theory Save, and within 20 minutes the fan will reach audible distress. It's not an overheating concern. The console was barely warm, yet I could still trigger it.

I thought it might be connected to the coil whine and GPU usage of the console. So I muted my TV, and played in silence, for hours. This game alters the coil whine of the PS5 exceptionally fast. Every press of the d-pad, when you zoom in and out on dinosaurs, when you cycle dinosaurs etc. Some actions are more notorious for changing the coil whine than others. Customising the appearance and modules of an amenity seems very laborious, and the camera zooms right in at the same time. Zooming in on certain buildings such as the science centre and the response building also strains the coil whine. I concluded that doing these actions too quickly is what makes the fan overcompensate for the high GPU usage. I could even control it, if the fan started getting loud, I can zoom out quickly (which all but deadens the coil whine noise) and the console fan will immediately slow back to its normal speed.


I moved onto San Diego, where I played to completion (20 hours or so) and in the desert environment I could not recreate the issue. The fan noise stayed consistently low despite my best efforts to push the game.

Today I moved on to Jurassic world Chaos Theory, where within a few minutes the fan in my PS5 reached super speeds once again - it did it 6 times in an hour, on my relatively empty map. I tried triggering it by cycling amenities modules and zooming in and out fast in the science centre. The gallimimus arrived and I sat on a random one, not touching my controller for a good while and just watching. And thats when it dawned on me, the fan was only having this issue when the time of day changed.

I left the game zooming close on a Gallimimus, lo and behold, at sundown the Fan went very loud. I waited still, and again at sunrise the fan went very loud again, even louder than at sundown. As the Sun was rising, as soon as I zoomed out, the fan would stop. Click back on the dinosaur, and the fan would blare up again, I could repeat this about 3/4 times quickly as the sun was rising and captured it on video.

I need further testing, and I'm no developer, but I believe that the sudden change in world lighting conditions, as the sun rolls across the foliage out of the map bounds, if you are doing certain actions simultaneously (zoomed in, changing amenity modules), will cause the fan in the console to rev up to max speed.
 
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This game makes my GPU get a little loud. It's not coil whine it's just fan noise. Coil whine happens, at least for PC GPUs, when you have high frame rate. My GPU gets coil whine when it reaches high frame rates like hundreds of frames per second. I play some older games and if Turn off V sync I can get well over 1,000 frames per second and I will get coil whine in splash screens and so on.

It's just fan noise. I don't know exactly why it happens. But my GPU fans will get loud.
 
I have also noticed that the tropical maps are very poorly optimized. Especially in the day-night and night-day transition the fps drops a lot. The rest of the biomes suit me well. It's something that happened to me at JWE but I had a worse PC.
 
I have also noticed that the tropical maps are very poorly optimized. Especially in the day-night and night-day transition the fps drops a lot. The rest of the biomes suit me well. It's something that happened to me at JWE but I had a worse PC.
Right now, I can trigger this problem 100% of the time every sunrise. As soon as the sun starts rolling across the jungle outside the map, I zoom in on a dinosaur, and my fan will go haywire, zoom out, and it stops, I can repeat it about 3 times, and once the sun is up properly, it doesn't happen.
 
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