Windows 10: External monitor higher frame rates are not showing

Hi, I hope this isn't out of topic. I am using Acer Aspire A515-57G Win11 23H2 as my laptop and I have a monitor call this monitor A for ease that supports 75Hz refresh rate. However, the option to switch to 75Hz doesn't show up after connecting it with an HDMI cable.It might be a driver issue, I initially thought. But after connecting the laptop to another monitor that supports 75hz frame rate, the 75Hz option shows up on the laptop, so I thought it might be a monitor issue. But, using another laptop and the same HDMI cable, connecting it to monitor A shows the 75Hz option in that other

:)

 

How to change frame rate of external monitor when all the screens are black?

I have a notebook that I want to connect to an external monitor on second screen only option (more info below). The problem is when I connect an 1.4 HDMI cable between them, the notebook tries to output a 4k 60Hz signal through its 1.4 HDMI port and as a result, both screens keep blinking. But even with the blinking I successfully changed the monitor's frame rate on duplicate mode, but on extended mode I switched HDR option to on and the blinking worsened a lot making changing back seemingly impossible. And the mode I want is second screen only, which there is no way for me to change the frame rate manually because I can't see anything.

So I thought, is there a way to limit the default frame rate to 30Hz so that windows won't be able to output a 4k 60Hz signal?

Notebook (limited by admin - company owned):

• Dell Latitude 3420
  
• HDMI 1.4 - What ports are on a Dell Latitude 3420?
  
• HD resolution
  

Monitor:

• Samsung TV
  
• 4k resolution
  

Answer found! Check my response below.

 

How to change frame rate of external monitor when all the screens are black?

My problem was my notebook was trying to output a 4k 60Hz signal trough its HDMI 1.4 port. I needed to change the frame rate to 30Hz and I finally managed to do it.

If you have a similar issue, follow these steps:

• Download QRes (link) to Downloads folder and unzip to QRes folder
  
• Open wordpad and write "%homepath%\Downloads\QRes\QRes.exe /r:30" (without quotation marks) (I put 30 there because I want 30Hz on the monitor)
  
• Save the file with a bat extension, like "change_fr.bat"
  
• Click once on the file, just to select it
  
• Change projection mode to "second screen only"
  
• Press enter
  
• Magic Happens!
  

In short, you'll execute a command that changes the current display's frame rate even when you don't see anything. And the best thing, you don't need admin rights!

Hope it helps!

 

frame rate

Hi, I'm David, and I'm happy to help you.

If I understand correctly, you change the monitor refresh rate to match the frame rate of the video you are watching.

Correct me if I'm wrong.

You don't need to change your monitor refresh rate to match the video you're watching. The video is displayed at the video's own frame rate.

Therefore, if your monitor is set by default to 60hz, videos that are in 24hz will be played in 24hz regardless of the current refresh rate configured for the monitor.

Even TVs work this way.

Feel free to ask back any questions.