Multiple windows open drops fps

[Balryon11 (Balryon1)]

I use 5 monitors!

When I open a barand new project, with Quixel bridge open and the content browser on a second monitor, I get 120fps

And when I open the mesh editor and the blueprint editor on my 3rd monitor or even 4th monitor, the fps drops from 120 to 70-80.

Is this normal? Is it because my GPU has to compute what’s in my Viewport (on one monitor) and also what’s in the Mesh editor (on another monitor) ? So it has to kind of work twice?

Much appreciated! Thanks!

Jean

[EliasWick]

Does the FPS change depending on the window that is opened in various screens? I mean, if you open a window on a 4K monitor vs one that is 1920x1080, it will use more power. However, the drop from 120 to 70-80 is very drastic.

[Balryon11 (Balryon1)]

I tested only one window open (mesh editor) on different screens and the fps varies about 2-5 fps. So if I use my 1080p monitor it has 2-5 fps more than my 2k monitor. Actually my fps drops to 70-80 when I have many windows open (mesh editor, content browser, Quixel Bridge, BP editor, Viewport, Detail panel, outliner panel)

[Ares9323]

This is a year old bug, I used to have it with 5.0EA and it’s never been solved…

There are other posts about this both on the forum and on reddit but there’s no real solution…

Huge UE5 framerate issue with multiple undocked windows

Chatting with another user on reddit, I discovered this strange bug that was making UE5 not usable for me. I have a 5950x and a 3080ti so it sounded kinda strange to me to see it work so bad, it was laggy even renaming folders and dragging nodes in blueprints… We discovered that the fps number of the editor is exactly the starting number divided by the number of windows not docked to the editor, for example if you start with 60fps and open a window you’ll get 30 fps, then 20, then 15 (and this…

FPS drop when using multiple windows

I recently noticed, I get 30 fps in editor, but 60 when I run the project as standalone. I’m using two monitors. On the 1st I got the editor (game-view, content browser, etc). On the second monitor is a separate window with the blueprints. When both windows are visible, I get 30 fps. When only the 1st one is visible and the second is hidden, I get 60 fps. I guess It’s not a performance problem, I’m at 30% CPU and 50% GPU usage. I also noticed, it caps pretty much exactly at 30 fps, not just some…

An user told me that he solved his issue by disabling TSR (Temporal super resolution), but that was not my case.
I have 6 versions of the engine installed and only one has this issue (source build of branch 4.27-plus), it’s kinda random.

Also try checking the Nvidia control panel (if you have a Nvidia GPU) and in 3D settings check if there’s a max-fps limit (both global and for the unreal editor).

[Balryon11 (Balryon1)]

Thank you very much for the insights! It really helps and at least gives me some more clarity! I’ll check this out!

[StingerTopGun]

@Ares9323

Also try checking the Nvidia control panel (if you have a Nvidia GPU) and in 3D settings check if there’s a max-fps limit (both global and for the unreal editor).

Thanks so much, this fixed it for me! I had a global max-fps limit set in the nvidia control panel.

[Balryon11 (Balryon1)]

I found one solution that did the trick for now and it’s to disable the option “Real-time” in any editor window. It might not be the absolute solution but it will help tremendously for me. Also, I rearranged the windows that I opened on my monitors so instead of having the Static Mesh Editor on one monitor, Level viewport on my main and material edtor on another for example, I started to used them all on my main monitor on tabs, so they are not “rendered” or “opened” at the same time which is another way that works well!

Hope this helps anyone! Cheers!

[Barry.R]

Task Manager-Nvidia Container-NVIDIA Display Container LS change the service startup type to disabled, then restart.

[lukaszml]

@Barry.R
I also experienced issues with FPS drops from 60 to around 15 when open multiple undocked windows. The problem turned out to be Nvidia G-Sync. Disabling the “Enable settings for the selected display model” option in (NVIDIA Control Panel → Display → Set up G-SYNC) resolved the issue.

If this doesn’t work for you, try completely disabling G-Sync by unchecking the “Enable G-SYNC, G-SYNC Compatible” option.

Don’t forget to click Apply in the bottom right corner.