Hi, I guess my problem is quite rare but still I will give it a try.
Since yesterday, I encounter really frequent and annoying freezes and FPS drops( one for let’s say 5 or 6 seconds) inside Unreal Engine 5 - doesn’t matter if it’s inside almost blank project, small level or inside huge open world map inside game I am developing. It’s also same for editor and in-engine playing, almost constant freezes. Before yesterday, I have encountered only a couple of freezes at the beggining of work or during compiling shaders and then everything was quite normal, maybe one small fps drop for 3 hours of in-engine work. Right now, even blockout from simple cubes has become annoying and frustrating.
Just to note, from time to time I can see fps drops in various games like The Witcher 3 or GTA V, but it was never happening in such numbers like inside UE5 right now.
I have no idea why this is happening, I have RTX 3060Ti, powered with i5-12400F and 16GB of RAM (3600MHz), engine and project installed on M.2 SSD, so specs are at least good for Unreal. Drivers are up to date, Windows 10 installed. I tried to reinstall the engine but it didn’t work( I use compiled version from source, as well as standard from Epic Games Store, problem is same on both of them)
So here comes the question - what can be a reason of such a bad performance and FPS drops inside Unreal, even inside blank projects? I will later try to add video to maybe illustrate the problem. I would be very grateful for any support and of course I will answer any questions if this can help the case.
Hey there @Pavvlito! Welcome to the community! With your rig you shouldn’t be having too many issues with the editor. For reference, my secondary rig is about half as powerful as yours and runs the editor quite effectively, so there’s definitely something wrong.
If you’re using Geforce GameReady Drivers, try to swap over to the Studio drivers. I’ve gained much more stability in UE4/5 editor side when I made the change.
Are you using UE5.1 exclusively? If so are you also using SM6 (Shader model 6)? It may have prompted you to enable it when you started the editor. If so, there is one known issue that hasn’t been pinned down causing pretty significant spikes on very specific installs/hardware.
Worst case you could attempt to drop down to DX11 RHI but you’ll lose access to anything that needs DX12 to operate.
For others that finds this thread hoping to solve stuttering in Unreal Engine Editor, go to your Project Settings → Plugins → UDP Messaging → EnableTransport (Set this to false).
This solved it for me, I had the Editor FPS drop happen in 4.27, 5.0 and 5.1, no content browser up, empty scene and no blueprint windows up.
PC specs: 3080Ti, 128GB ram, threadripper CPU (24cores) and so forth.
PS: More info, UDP is related to network settings.
If you are using a VPN that might cause this issue too.
Oh that’s good, this might also solve an issue we’ve been seeing where the UDP plugin is crashing on networks that use tunneling or VPNs. Were there any errors that pointed you in this direction?
Honestly found most hints online, startFile and stopFile commands was going to be my next step in figuring out what caused the drop but I managed to solve it before then.
I came here to share it since this was the only relevant hit google gave me on the issue, had to use forum search bar and some other stuff to find other relevant topics.
Came here to say you saved my life. Had this same issue on UE5.4.4 immediately after turning the setting off the frequent lagging stopped.
There was also another bit of stutter, but that came from the fact that both volumetric clouds and realtime skylight texture together were a bit too much to handle.
EDIT: This did not solve my issue. The changing of the setting just happened at the same time as the intermittent going away of the issue.
Mine seem to be triggered everytime i open a new window or menu, and lasts for a few minutes. Unreal Insights just tell me it’s something with FrameTime or something…