The materials I use
2020 14" Dell Inspiron 14 5490
İntel i3 1011U, 4GB DDR4 RAM, İntel UHD Graphics, 256GB NV M.2 SSD
EXP GDC 8.5c A+E key
MSI GTX 750 Ti Twin Frozr
350 WATT PSU
Windows 10 Pro v20H2
Steps i took
1- Bios settings remain the same as factory settings, please do not change the settings.
2- While the computer is starting, you can press the F12 key, select SSD and go to windows.
3-Then install the necessary nvidia drivers.
4- And happy ending, everything is running smoothly.
1-Bios fails to go directly to windows without pressing F12 ( I don't know a solution for this )
2- Works on Gen 3 version, you don't need to make any settings for it
3- You can use your built-in monitor.
4- I'm making myself a nice egpu box right now I'll share pictures with you when it's finished