BIOS screen not appearing when i install Hackintosh and with dual screen setup

Hi Guys,

I am having Ryzen 5 3600 with Tomahawk B450 (non max) version. and i have a dual monitor setup (2k monitor and 1080p monitor).

I am successful in installing High Sierra so that i will have gpu support to my Gtx 970.

If i am connecting both the Monitor, i am not getting the Bios screen or OS picker screen and directly booting to Windows.

if i am connected to only 2kmonitor alone, then also same directly booting to windows.

If i press DEL or F11, then i can see the PC running but no video output.

But if i am connected to only 1080p monitor alone, i am getting the entire sequence.

Anyone else facing the issue.

Cheers!!!!