Windows 10: cant change Hz to 180 on display port

I have a 1080p 180Hz monitor and I just recently bought a display port which says at 1080p it can run at 240Hz but when I change the Hz to 180 the screen turns off I had the monitor on a HDMI cord and it works fine but I want to connect a second monitor and my pc only has one HDMI port 1. why does it turn off2. why did it work with a HDMI and not a display port

:)

 

Monitor still dont get 180 hz

So i today bought a DP 1.4 cable for my monitor to get 180 hz and when i connected the hdmi side to my monitor and the display port side in the pc i still didnt get 180 hz why?

 

180 hz olan asus monitörüm 165 hz veriyor ekran kartım 3050

180 hz olan asus monitörüm 165 hz veriyor ekran kartım 3050

 

"input signal out of range, change to 1600 x 1050 @ 60 HZ"

Hi,

Here are the reasons why you're getting the "input signal out of range, change to 1600 x 1050 @ 60 HZ" error:

• The monitor cannot accommodate the set refresh rate (e.g. 60Hz).
  
• Outdated graphics card driver
  

For us to effectively assist you with this, we'd like to know the following:

• Which build and version of Windows 10 are you running on your device?
  
• What is the maximum possible refresh rate can be set for your monitor (refer to monitor's manual)?
  
• Were there any changes made to your computer prior to this issue?
  

We're looking forward to your reply.