BIOS freezing and booting issues

[smrdelj]

Hello to everybody and thanks for reading and helping! And Excuse my english please

My pc:
i7 7700k (cooler corsair h100i v2)
asus strix z270F (bios 0701)
xfx rx480 gtr 8gb
corsair vengeance 16gb ddr4
ssd samsung 840 evo 256gb
hdd wd caviar black 1tb
psu evga supernova g3 650

I finished installing my new peripherals, which are:
-Monitor ViewSonic Gaming XG2401 144hz (connected via DP to vga)
-mouse zowie ec2-a
-mechanical keyboard ajazz ak33 rgb

I went through many problems in order to get my system up and display working via displayport, but at last the issue seemed to be solved, at least in windows environment. Im still sometimes facing some booting issues (pc getting freezed at first asus logo splash screen), but not regularly.

The actual problem is: i noticed that there's a new bios version for my motherboard (0801) so i was willing to update via usb flash. I dont do it via asus windows software (ez update) because first i want to save my OC profile. So, when i enter bios y discovered that it get freezed just in a few seconds. I barely managed to move the mouse or press the keyboard and then it freezes, forcing me to reboot system.
So i just cant get into bios.

Im thinking that:

1) maybe theres some king of incompatibility or error caused by DisplayPort connection.
2) or maybe theres something wrong (and extrange) with mouse or keyboard at bios that make system crash.

What do you think? Thanks!

 

[The Paladin]

take video card out, plug monitor into vga of motherboard, try again
if same, take half your ram out (leaving stick only in slot_0 ) andtry again, if jam again , swap ram stick and try again.

 

[smrdelj]

The problem is 100% related to displayport, cause if i connect the monitor via hdmi all works perfectly.

I read in other topics that dp sometimes causes issues in pre-windows environment because of something related to voltage, like if dp send voltages unknown for mobo and causes freezing

Sounds crazy, i don't know if its nonsense or not, but what i can definitely tell is that via hdmi problem doesn't exist