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Is there a way to limit GPU usage?

I am new to UDK and am following the programming quick start guide from the documentation website. After creating a new blank project the Unreal Editor starts. Right away my GPU activity jumps to 98% as seen in the AMD Catalyst Control Center -> Performance -> AMD Overdrive page. As soon as I close the Unreal Editor the activity drops back to 0%.

I am running Windows 8 with an AMD 7950 video card. I am running catalyst version 13.12.


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asked Apr 19 '14 at 03:02 AM in Using UE4

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2 answers: sort voted first

In the top right corner of the Editor there is an input field for console commands. Try to enter t.MaxFPS 30 , that will limit the fps to 30. I do this a lot, so that the gpu doesn't run at 99% all the time.

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answered Apr 19 '14 at 10:22 AM

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avatar image tas May 07 '14 at 04:42 AM

"t.MaxFPS 20" works like a charm to limit GPU usage ( along with Realtime checkbox), unfortunately it also affects BluePrint Editor. Panning becomes very choppy...

Is it possible to limit only viewport FPS, without BP editor ?


avatar image tas May 07 '14 at 05:24 AM

and how can I execute this command each time I start editor/project ?

I tried to put it in config files, but not luck.

avatar image tas May 07 '14 at 06:58 AM

found file to edit to get low FPS at startup

C:\Program Files\Unreal Engine\4.1\Engine\Config\Windows\WindowsEngine.ini

add this line at the bottom


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Does it stay at 98% when you turn Realtime(from the drop down menu that opens with the little arrow in the corner of viewport) off as well?

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answered Apr 19 '14 at 03:06 AM

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avatar image jpetra Apr 19 '14 at 03:11 AM

When I turn realtime off the activity drops to 10-20 percent. At least my GPU fans stay off now.Thanks!

avatar image jpetra Apr 19 '14 at 03:14 AM

It still jumps up to 98% as I rotate/move around the viewport though.

avatar image Jacky Apr 19 '14 at 03:16 AM

That is normal, when you turn realtime off it renders only when you interact with the level.

avatar image jpetra Apr 19 '14 at 03:17 AM

Ok. Thanks for the help.

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