Event graph lagging

Dragging wires is really laggy in the event graph for empty projects, fully loaded projects, and new templates. I have the latest OS and GPU updates.
My Specs:
-OS: Windows 11
-CPU: I9900k
-GPU: 3090 FTW Ultra
-Storage: 2TB M.2 with 218GB free
-RAM: 32GB
-Display: Samsung Odyssey G9 Neo monitor (32:9 ratio) (5120x1440).

I have asked this question in the blueprints slackers channel and voice channels and spent time looking into the internets without luck. No ideas left to look into. The best its been was right after CCleaner cleaned my system, removing temporary files. The lag comes up after working in the editor, after opening several tabs but persists after several tabs have been closed.
Open to trying things and following up to solve this!
Thanks for the help.

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If you throttle your fps ( with something like t.maxfps ), the BP editor will run similarly slowly.

Just something I noticed…

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I don’t have any throttling software.

Someone mentioned Nvidia Overlay and disabling that. But as far as I can tell it is not on unless I use the shortcut to start screen recording.

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I meant in the editor. If you do set the fps deliberately low with t.maxfps, then the BP editor is correspondingly slow.

It doesn’t sound like your problem, though.

I sometimes get BP editor lags when removing groups of nodes. It might be BP_Assist ( the plugin ), but I’m not sure. I have to restart.

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I will check that out. I might go through and uninstall programs today if that doesn’t solve the issue.

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Update: What you mentioned gave me the idea to go through project settings and editor preferences and set all frame rate related settings that were set to 30 by default to 60 and did not see any changes.

For windows 11, in task manager, I selected Windows Explorer and end that task seeing an immediate ~15% boost to ue5 responsiveness. I also, within task manager>Details tab, set the Unreal Editor priority to High by Right click on Unreal Editor>Priority>High. This step didn’t have noticeable changes.

Possibly also worth mentioning, and I will update original post, I have the Samsung Odyssey G9 Neo monitor (32:9 ratio) (5120x1440).

These are steps troubleshooting for this issue up to this point.

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What’s your CPU?

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CPU: I9900k

I really have no idea, I’m afraid. I notice your SDD is 90% full. Grabbing at straws here…

I also saw something referring to this

We’re both grabbing at straws. I will uninstall games but I do have over 200GB left.

Also worth mentioning is that the issue started when I installed windows 11. I also got windows power tools and uninstalled that to try and fix the lag. This didn’t fix anything.

And something to keep at the front of this is that the lag is gone when I restart my PC and until I e opened several tabs. Closing the tabs after having several open, lag stays the same. So this tells me something about temporary files being stored so opening those tabs again will happen faster. I don’t think my PC does not likes those temp files for some reason and not sure where BP or event graph stuff is stored. I’d like to see the storage size of that folder before the lag and after.

Something also tells me that if the temp files are an issue though, that lots of people would be experiencing this. If that’s the case, than it comes back to other programs interfering somehow or like you mentioned, remaining storage space.

I will also check that optimal power option, but again, others should be having this issue if that optimal power setting is required.

Obvious candidate for ā€˜other programs’ interfering, of course, is Anti virus.

I set the power setting in nvidia control panel for the program settings (Unreal Engine 5) and global settings tabs to ā€œmaximum performanceā€. Optimal was not an option. I also uninstalled ~250GB of games. No changes. I even only had 1 tab open this time and instantly had lag issues.


Not much in this event graph though.

I don’t know at all what to do about the antivirus. I am using windows default programs for that.

I will restart after those Nvidia control panel changes and after uninstalling those games and update here.

Update: Super smooth after a restart, but this has always been the case. I also turned off Nvidia overlay. If I don’t post anything else to this thread, then disabling Nvidia overlay, maximum power settings in global and program tabs (Unreal Engine 5) for Nvidia control panel, and/or making room on your storage by uninstalling stuff solved the issue. But don’t forget to restart.

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Old thread but just realised it was G sync causing it. It was the first thing I tried as is not the first time G-Syncs causes some random performance in some random software for me.

Left click on desktop>nvidia control panel > g sync options (or something like that, my panel is not in English) turn that off while you are working on Unreal

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This solved it for me as well. G-Sync turned off fixed it almost instantly. Thanks friend

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