GPU Performance issue

Development Rendering
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Hello everyone!

I have a heavy and quite demanding project i’m working on. The project was actually started by a seasoned unreal environmental artist who passed it on to me so that i can “play with it” to progress in my unreal journey.

Anyways, the issue i have is that this project makes my RTX 3090 Ti 24 GB drop to its knees, i’m always spiking at 100% GPU usage otherwise it’s always between 95 and 99% usage.

Granted, the project is heavy, it’s like 26GB, tons of actors and elements into it, loads of pluging. The aim is to make a realistic cove and the scale is quite huge. If it were only due to my PC limitations then i’d say so be it.

The weird part is that, the seasoned artist’s PC has a weaker GPU than mine, he has an RTX 3080 Ti 12 Go.

He can run the project smoothly and his GPU usage never goes beyond 25%, we have the same scalability setting in UE, epic. I monitored my GPU usage while roaming in the viewport or the play mod, steady 99%, i’m never tapping into more than 12GGB out of the 24GB the GPU has and the temperature never passes beyond 65°. The pc is making a lot of noise, the usage is spiking as hell and the project is very laggy.

I was able to patch things up by capping the fps to 60 within the console’s engine but that’s sad as i have a 2k monitor 144 Hz.

I’ve tried capping the fps in nvidia board, my drivers are up to date, the monitoring shows no red flags regarding the hardware, i even tried launching it on a full hd resolution monitor, i barely gained few percent on GPU usage.

Technically by capping the fps and playing with the vsync i can work on the project but it kills me that somebody can run it smoothly with a 3080 Ti 12GB and i can’t on a 3090Ti 24GB.

My specs:
CPU: I9-13900KF
GPU: RTX 3090 TI 26GB
Motherboard: Z690 CARBON WIFI
ram: 32GB (2x16)

I’m quite a newbie at unreal so if i failed to provide any basic information please told me.
Thank you in advance for any input!

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It might be due to you having different editor settings maybe? As temporary measures for now:
-try disabling real time under viewport options located on your top-left corner of your viewport.

-lower your engine scalability settings and material quality level under settings located on the top-right corner of your editor.

-Lower Final Gather Quality. If your project has a post processing volume make sure that the “Final Gather Quality” setting is set to 1. The artist might have increased this value to improve lighting flickering at the cost of performance. For reference: https://www.youtube.com/shorts/Zfc11Agbk-U

-you could also setup world partition to only load the areas you’ll be working on.

Are You using lumen for lighting and reflections? Check your Project settings under “engine” and “rendering”, that entire page of settings might help you. Let me know if anything helped, Good luck.

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Hey thank you for your input, my editor settings are similar to his and yes i am using Lumen for lighting and refletion.

I also appreciate the means to lower quality that you shared, i’ll keep those they may prove useful my future work.

What i am looking for is more GPU oriented in the sense that is there something i forgot to do or i do wrong regarding the settings that makes my GPU incapable of handling the project without shading tears of blood. We run the same project, with the same settings but it’s even worse because he has a 4K display, mine is only 2K and he has no issues with a weaker GPU.

That’s the mystery i’m trying to solve because i wanted to scale up the project in question but if i’m already having trouble at this point then i have no margin of progression.

If it’s only due to my PC limitations then so be it, but something tells me it is not, something tells me there is a software setting where ever it is hidden, that makes my GPU inefficient when handling UE5. Of course that’s only instinct talking that’s why i’m requiring more practical and technical help :slight_smile: