I need to Help. ( Generic Non PnP Monitor )

Mar 24, 2018
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Hi, Everyone ! Korea is a Night !

Haha,..
First, I'm South Korean, I can not read or write English well.
So please understand that English is different somewhat.

Some are translation and some are my English.

It's my environment.

CPU : AMD Ryzen 7 1700 ( OverClocking : 3.8Ghz / 1.304V )
RAM : Samsung DDR4 PC4-17000 8GB * 2 (16GB / OverClocking : 3200Mhz , CL18)
VGA : Zotac GeForce GTX 1070 AMP! Edition
M / B : MSI B350 Tomahawk (BIOS Ver. 1.F0 / 2018.03 Release)
SSD : Micron Crucial MX200 250GB ( MU04 Firmware )
HDD : Toshiba 3TB
PSU : SuperFlower 600W SilverGreen
Case : Bravotec Stealth TX

Well, I'll explain the symptoms.

I updated the BIOS on the main board.
1.C0 -> 1.F0
Subsequent only the monitor " DP " output produces symptoms.

"Generic Non PnP Monitor" , "800x600 or 1024x768" , "60Hz ~ 240Hz"

But, But I use this !
AOC G2460 Monitor (1920x1080, 144Hz)

There is no problem with DVI or D-SUB.
Only for "DP" !
What should I do?