In this guide, I will show you how you can use a 144Hz/120Hz or Nvidia G-sync monitor together with an Elgato Game Capture HD60, to play games at the high refresh rate, and record at a crisp, clear 1080p 60FPS.
Make sure that your main 144Hz/120Hz monitor is connected to your GPU via DVI/DisplayPort, and the HDMI output is connected to your HD60 HDMI input.
Right click somewhere on your desktop
Click on Nvidia Control Panel
This will open the Nvidia Control Panel.
On the left sidebar, click on Set up multiple displays
In the select displays you want to use box, you should see your main monitor, and one called Elgato.
In the second box below, right click on the primary display, marked with a big 1.
Hover over clone with, and select display 2.
Now click apply at the bottom. Your screen may go black and flash, and a box will come up asking to keep the changes. Choose yes.
Now, on the right hand sidebar, click on Adjust desktop size and position.
Click on the main monitor at the top, and under scaling, choose no scaling, and set the scaling to GPU.
At the bottom, make sure the resolution is set to 1080p, and the refresh rate is set to 144Hz/120Hz
Now click on the Elgato monitor, and set it to No scaling, perform scaling on GPU.
Below, set the resolution to 1080p and the refresh rate to 60Hz.
On the right sidebar, click on Change resolution.
Click on your main monitor at the top.
In the resolution scroll box, scroll down and under PC, select 1080p.
You will also see a refresh rate box. Click on it, and select the appropriate refresh rate for your monitor(Either 144Hz or 120Hz).
At the top, click on the Elgato monitor. The resolution and refresh rate options should be grayed out.
Now click on Apply. Your screen may flash. Make sure to choose yes to Apply these settings.
Close the Nvidia control panel, and open the Game Capture HD software.
After a few moments, you should see your monitor, in the Game Capture preview.
DONE! You can now play at 144Hz/120Hz and record at 60fps with your Game Capture HD60 and HD60s / Pro.