Unreal Engine is "not responding" and making my pc EXTREMELY slow

[Affepaffe58]

Hi, i have a very anoying problem with ue 5.3. When i boot up my project its completely frozen and taskmanager says its not responding. My entire pc also gets exremely slowed down (so slow its almost unusable).

This problem has never accoured before and just started happening like a week ago. This makes me not able to work on my game wich is really frustrating. I have tried a lot of solutions like: updating graphics drivers, reinstalling the engine, verifing the files but nothing seems to work.

And, when i try to open up the project laucher (and not the project directly) unreal just crashes.

Does anyone have an idea how to solve this issue?

[Everynone]

Are you experiencing this in a clean project? Like a standard template? What are the chances some new assets are causing this? Certain marketplace items can be somewhat under-optimised.

This problem has never accoured before

So we can safely assume your PC is not grade, right?

[Affepaffe58]

I have tried opening a project that has worked before without issues, and ive tried other projects (one completely empty one). The issue is still there.

My pc is not potato because i could run ue5 whitout problems before and all my games is working as usual

[Everynone]

My pc is not potato because i could run ue5 whitout problems before and all my games is working as usual

Have a look at how your PC is allocating resources while in UE. The humble Task Manager (Ctrl+Shift++Esc) could be a start for a rough overview.

• what is your CPU doing?
• is the GPU doing anything?
• which GPU is being utilised - you did not disclose the non-potato specs but iGPUs can sometimes sneak in and take over
• is the memory full?
• perhaps your HDD / SSD is doing something weird?
• is there any other app hogging resources in the background?
• is there a process that is is misbehaving?

Ideally, you’d get some proper hardware monitoring software, check temps as so on.

[Affepaffe58]

ok, so i did a check and wrote down everything thats happening when i launch the engine.

1. I lauch it. Everything is normal. cpu good, ram good, gpu good, everything good

2. after a while the editor window appears but completely frozen and “not responding in taskmanager”, again all the values are good (ram whent up a little but nothing weird)

3. after the editor has been frozen for about 5 minutes i get a popup that says “Running pythin startup scripts”, right here it gets weird. My ram suddenly skyrockets and uses 100% of my 32 gigabytes. My correct graphics (not igpu) cards vram also skyrocktes and gets used at 100%

4. I get a popup from unreal that says my vram is full (which is true)

5. Unreal stays frozen and

before i did this test i made sure to turn of all apps that where using the graphics card so no conflict would happend. My ssd is fine i even reinstalled unreal on another ssd and the issue is the same. All the temps where also normal during the entire test

This is really driving me insane…

[Affepaffe58]

Update: i managed to fix the problem by using directX 11 instead of 12 in my project. I changed it in the project config DefaultEngine.ini

“DefaultGraphicsRHI=DefaultGraphicsRHI_DX12”

changed to:

“DefaultGraphicsRHI=DefaultGraphicsRHI_DX11”).

I filed a bug report to epic about this.