REQUEST Acer 571G How i disable dgpu?

Hi guys i have acer 571G. Bios :Insyde ver. 2.21 and it’s unlocked. i want to use eGPU( RX-570 ) but i am not disabling dGPU(GT-730M), there is not disable options in advanced options so eGPU not working.

anyone help me please. how i disable dgpu?