MSI Z270 A PRO - Graphic Card - Display - No Signal Issue


I am not an IT guy. Facing issues.

When placing graphic cards on motherboard, there is no display coming on screen.Tried with one on PCIE 16 slot. All works normal without graphic cards. Updated & Changed bios settings as per discussion above. 4G- Enabled. Still no results.

I have tried to construct a RIG - Components

8GB RAM 2400
I3 - 7100 - LG1151
1000 W- corsair
Sapphire Nitro RX470 4GB - Mining Edition- x 6’
Windows 7 64 bit.
Raedon Driver - 17.7.2

As screen doesn’t startup with graphic cards, I am struck with it. No progress.

Please instruct on issue. Thanks.

Following Error solved with BIOS Setting IGD