When creating a dual monitor setup, it’s often beneficial and economic to use an old monitor with your current one. Old monitors often don’t have an HDMI port and only have a VGA port for video input. Because of this, it’s best to connect both an HDMI and a VGA cable to your computer.
Do you need both HDMI and VGA?
It will not hinder or make display work better since screen cannot use both at the same time. As a side note, there is no big difference between HDMI and VGA if you are at 1080P and 60Hz, going to higher resolution/refresh rate can change things.
Can you use both VGA and HDMI at the same time?
It is physically possible to attach a VGA and HDMI connector at the same time. Most likely yes.
How do I display HDMI and VGA at the same time?
HDMI->VGA – Input is HDMI and Output is VGA (Audio is lost). If your display supports HDMI and your RPi provides HDMI output, then you can directly connect RPi HDMI port to HDMI port of monitor. If your display supports only VGA but RPi is HDMI, then you need HDMI to VGA converter + (VGA to VGA cable).
