I have an old (but reliable) Asus EAH6850 graphics card which I bought 2010. Have been re-using this card everytime my PC went through an upgrade. My last upgrade was end last year when I upgraded my motherboard to Asus H170M-Plus Skylake but I kept using the card. Main reason in the past of using this card is to run 3 x displays concurrently. Now that the latest motherboard can also drive 3 x displays out of the box (HDMI, DVI, VGA), I am not sure if I should retire this card (or not). I did see that the PC power consumption drop from 100W'ish (idle) to now 37w (idle) and thought maybe retiring the card is the only benefit.
What would u guys do when running multiple displays? Use onboard graphics or use a dedicated card.
I'm for Onboard.
Unless you're doing something graphical like video editing/photos/gaming/mining, then theres no need for it. Like you said, the onboard can handle 3 inputs and saves on power when idle.