# UEFN crashes on launch **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** fortnite-creative, unreal-editor-for-fortnite, fortnite\ **Created:** [November 19, 2024, 12:30am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195 "2024-11-19T00:30:59Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [November 26, 2024, 7:15am UTC](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195/3 "2024-11-26T07:15:48Z")
> [@NV7V](#): > > Regedit --\>TdrDelay = 60 My Nvidia card needs 300 minimum to 500 for an early Nvidia graphics card Regedit --\>TdrDelay = 600 Then follow an old post [[RESOLVED] Issue with New Installations of UEFN - General / Announcements - Epic Developer Community Forums](https://forums.unrealengine.com/t/resolved-issue-with-new-installations-of-uefn/1771613/25) dont use -dx12 -sm6 use -dx11 -sm5 UEFN does not NEED tDX12 his and dont use NVidia SLI or DLSS. Ue5.5 UEFN does not support the and the support has been removed finally try [Any version crash!!! - Development / Programming & Scripting - Epic Developer Community Forums](https://forums.unrealengine.com/t/any-version-crash/1800563/5) There is a patch in Latest EPGL Launcher 17.1 gives UEFN 32.11 --- _[View the full topic](https://forums.unrealengine.com/t/uefn-crashes-on-launch/2134195)._