A:Answer As you point out, the Lenovo Legion Tower 5i Gaming Desktop, model number 90NC00J9US, ships with the Nvidia GeForce GTX1660 Super GPU, which has three different video out ports: 1x DVI, 1x DP, 1x HDMI. Depending on the connectivity of your monitor, use the port your video cable and monitor require. A VGA monitor would require an adapter. connect the monitor to the proper port, power on the monitor, boot up the computer and the Windows 10 Initial Activation screens should appear. If you have speakers attached to the computer, you will also hear audio instructions for activation of Windows 10. Follow the instructions to get to the Windows 10 Desktop. If you have any issues, we recommend you contact Lenovo Tech Support at: 866-426-0911.