4.24 will not launch with -dx12 added to engine shortcut

link textbrand new msi 64 bit i7-9750 32gigs of ram
Upgraded win to latest 1909
newest Nvidia drivers - tried both game and studio
added -dx12 to launch of engine shortcut 4.24
CRASH
took out all marketplace plugins
CRASH
this is just to launch the program not any particular scene

driver game version / tried same version of studio
Version 442.19 - WHQL
Release Date Mon Feb 03, 2020
Operating System Windows 10 64-bit
Language English (US)
File Size 529.54 MB

Can you please format the text in a code block.

i dont know what that means - i killed the text