Coil whine, performance issues, and crashing in full screen mode

[Newusername3000]

I purchased the game on March 29th with all DLC.
Running on: Windows 11
AMD Radeon RX 6800 XT
AMD Ryzen 7 5800X3D 8-Core Processor (32gb RAM)
Everything fully up to date, including drivers.
Everything in top condition.

Immediately upon launching the game, my PC produces a cricket/chirping type of sound that I've read could be coil whine. While in the game's menu, AMD info shows my system struggling. After launching a game (empty land, nothing built, no assets and no mods) the game crashes my PC.

I am able to play the likes of Planet Zoo with packed out parks on maximum settings with no issues.

I discovered, however, that if I switch Skylines into windowed mode, the aforementioned issues disappear and the game performance becomes excellent in AMD's info window. As soon as I swap back to full screen mode, the issues I've mentioned immediately return. I have not been able to replicate this in other games, such as Planet Zoo. I have also tested various other things such as modifying frame rate settings and putting all visual settings to their lowest. Also, while in full screen mode, if I press Alt + R, the noise worsens significantly, perhaps suggesting that the GPU is hitting extremes. However, again, it's not a factor in windowed mode. So, the issue is limited to Skylines in full screen mode and I haven't been able to resolve it in any way other than by switching to windowed mode. I have that resolve, at least, but I would prefer to play the game in full screen mode if possible. Is this issue known? Are there any other potential fixes I could look into?

Thanks!

 

[prismaticmarcus]

Moved to Support & Bug Reports

 

[MarkJohnson]

Maybe try following everything in this post and attach everything it asks:

How to best report technical issues and get help!

So you are experiencing some technical issues? Please keep the following in mind before posting in this forum. Reducing non-constructive posts in this forum is for everyone's best as it will help us identify real problems faster and it will be...

forum.paradoxplaza.com

 

[Newusername3000]

Apologies for initially posting in the wrong section.

I think I've resolved it by accident. Tweaking AMD gaming settings had some positive effects but a second AMD gaming profile was created and I lost track of which was which. I think disabling 'AMD Fluid Motion Frames 2.1' by itself had a positive effect, but I decided to delete both profiles in the assumption that a new one would be automatically generated and I could tackle them again from the default. Well, the game then launched with no coil whine or noticeable issues and no new gaming profile automatically created. I get the impression that AMD was applying aggressive optimizations that were doing more harm than good. Time will tell, but if anybody else experiences something similar and finds this post, try deleting your gaming profile for the game. It looks like it has resolved the issue in my case.