Will inactive apps in GG effect performance even though I don’t use them?

If you don’t want to use an app such as Moments, you can turn it off in the settings. When turned off it will not effect your performance and will not run in the background.  

The same goes for SteelSeries Engine. If you don’t have a SteelSeries device plugged in, the Engine application inside GG will not be running in the background. 

To turn Moments off you can do either of the following: 

1. Click the dropdown menu above the Moments gallery and turn off “Gameplay capture”
2. Go to Settings -> Capture and Sound -> Turn off “Allow Moments to capture while gaming”