For a while, I have been having a problem with Unreal Engine 5.4 where every few seconds whatever i am currently navigating in (blueprint editor, world editor, playtest, etc.) freezes for a few seconds and does not respond before unfreezing for a very short time and then freezing again. Usually it goes away after a minute or two, but recently it has been staying for the entire time my editor is open. This is also accompanied with my monitor’s brightness flickering (which makes me think it could have something to do with my GPU, but it has happened in the past even when I have up-to-date drivers), but I am not sure. It is incredibly annoying, so any help is greatly appreciated. I am also pretty new to unreal engine, so further elaboration would also be greatly appreciated. Thanks! Video here
Specs:
OS: Windows 11 Home
CPU: Intel 12th gen i7
16gb ram
GPU: NVIDIA GeForce RTX 3060
Yep, had that issue with similar RAM & VRAM specs. (Not CPU or GPU but they’re not the issue here) You’ll want to navigate to Nvidia Control Panel > Display Mode and switch to the Nvidia GPU Only mode while using the engine. That way you’ll get a smooth experience while using the editor, if there are no other issues. (Also make sure that it’s set to high performance from Windows settings, and obviously use the engine while your PC is plugged in.)
You also won’t experience those random freezes even on Optimus display mode if you upgrade the RAM from 16GB to something like 32GB (the officially recommended capacity to get a decent experience from the editor) or 64GB (required for a realistic open world game)
About the flickering issue, could you expand on that? I personally had a flickering issue around the edges of the screen whenever I enter & leave the PIE mode while being on the Nvidia GPU Only display mode, but couldn’t find any references of the same issue online. If that’s the case, I learned from an ASUS representative that it’s caused by the fluctuation between RAM and VRAM while switching from the PIE window to the editor. Maybe we’re talking about different issues here, but still wanned to mention that anyway.
Hope these help! 
Hi! Thanks for the help, but I’m having trouble finding the settings you were talking about. In the NVIDIA Control Panel, there isn’t an option for the display mode, and I’m not fully sure what NVIDIA GPU Only mode does, but I’m assuming it prioritizes the NVIDIA GPU, which is my only GPU, so I don’t see how that could be an issue (I’m probably wrong tho). Also, when you say the “Windows settings” what do you mean? Like the Windows control panel or just the Windows settings app? And for the flickering, its that the physical monito screen’s brightness is flickering between its usual brightness and a slightly dimmer brightness, but this issue doesn’t really affect the editor (I think) as I have been able to run it fine with the flickering. It happened a while ago when I changed my refresh rate from the 60hz default to the max of 165hz, but only while I was playing Roblox, so I’m not sure if it affects performance much. Thank you so much for the help!
Oh I assumed you were on a laptop for some reason 
I guess it’s because that was the fix that came to my mind since it worked for me when I had 16GB RAM on my laptop.
So here are the things you can do:
- Make sure that the editor is set to run on high performance from Windows Settings > System > Display > Graphics
- Try reducing the scalability of the project from Settings (on the top right) > Engine Scalability Settings
- Consider upgrading your RAM. Like I mentioned earlier, the minimum recommended RAM capacity for UE5 is 32GB
Hope this helps!
After I set it to run on high performance, the slight freezing seems to have been completely eliminated. Thank you so much for your help!