macOS Sierra Public Beta 2 something weird Graphics Problem

macOS Sierra Public Beta 2 successfully installed but a weird problem facing on nvida graphics Boot screen,launchpad, are fine but desktop,and other screens are entirely up normal kindly look at my attachments
My spec:
I7-4770
Asus 87-k MB
gainward gt 630 2gb ddr3

My clover config file also attached...someone help me..


EDIT
(24-7-2016):Same spec Working fine on el cap 10.11.6.So i am Reverting for a while now