Windows 10: How to connect a second monitor?

My pc won't detect a second monitor, but when I plug one in, the display is duplicated across both screens and the resolution drops to the minimum. Manually detecting for a second monitor doesn't work. Both monitors are the same make and model. I am using a single hdmi port with a splitter. The display is also stuck on pc screen only with no way of changing it.

:)

 

connecting second monitor

I would do as @NavyLCDR suggested here: connecting second monitor

 

Second monitor not detected after update

Hi Tom,

There are several reasons that could have caused the issue you are experiencing. One of these is the update you previously performed in Windows, either it was not configured properly by the system or the update components were corrupted. Kindly answer the
following questions for clarification:

• Have you tried updating the monitor and display drivers?
• Have you tried to use another user profile to check if the issue re-occurs?

Furthermore, we suggest that you add the other monitor manually. This is to ensure that the second monitor is still connected after the update. Here are the steps:

• Type connected devices and open Connected Devices on the
  Windows Search bar.
• Click Add devices.
• Select the Second screen.
• Pick one of the 3 options: Duplicate, Extend, and the Second screen only.
• The Duplicate option will duplicate the primary display to secondary display.
• The Extend option will unite two monitors so you can use them both as one.
• The Second screen only option will, obviously, disable primary and use only the secondary monitor.
• Once you’ve chosen the preferred mode, save changes.

We're looking forward to your response.

 

Things to do once connected new G-Sync monitor

I'm getting my G-Sync monitor today.

I think I have to take the following steps:

• Connect 1440p G-sync monitor with DP cable
• Connect second 1080p 60Hz monitor by HDMI
• Startup PC
• Reinstall display driver
• Restart PC (I always do that after display driver install)
• Activate G-Sync in NV control panel (I believe also V-Sync is auto on after that?)
• Set my 1440p monitor from 1080p to 1440p
• Calibrate my 1440p monitor

Also ingame, I should turn off V-Sync?
Are there any problems running a second 60Hz 1080p monitor?

Is there anything else I should do/know?