idle 0 Posted January 13 Share Posted January 13 Dell Optiplex 3046 MT, Core i5-6500, 16Gb DDR4-2400, Intel HD530, 2560x1440, Big Sur 11.1, DELL U2718Q 4K I installed Big Sur, the config was taken from some forum, everything works fine except for displaying an image at a maximum resolution of 2560 × 1440. The computer is connected to the monitor via DisplayPort. DELL U2718Q monitor supporting 4K output. Windows on the same computer outputs 3840x2160 60Hz. Can someone help to get to output 4K resolution in Big Sur? EFI_OC.zip ioreg.zip Quote Link to post Share on other sites
Moderators Jake Lo 1702 Posted January 13 Moderators Share Posted January 13 You'll most likely need to increase the DVMT Pre-alloc to 128MB using a shell command since it's not available in the BIOS Quote Link to post Share on other sites
idle 0 Posted January 17 Author Share Posted January 17 Yes, I heard about it ... If I'm not confusing anything, should I enter some commands using modGRUBShell.efi? Now my system allocates 1536 MB, tell me what commands should I enter and what other changes should I make to my config.plist? PS Sorry for my English ... Quote Link to post Share on other sites
Moderators Jake Lo 1702 Posted January 17 Moderators Share Posted January 17 modGrubShell.efi should work but you need to find the specific value to change for your system See here Quote Link to post Share on other sites
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