If the source supports dual-mode DisplayPort (also known as DP++), then you can use a passive adapter because the source can perform the conversion. If the source does not support DP++, then you mustuse an active converter, which includes additional chips to perform the conversion.

Thunderbolt ports support DP++ natively. To run multiple monitors from the same computer, see the Active Adapters section below. When you convert video from a source that uses DisplayPort or Mini DisplayPort to DVI or HDMI (ex: a computer to a monitor). Consider the difference between passive and active adapters. Active adapters use additional chips to make the conversion inside the adapter, regardless of whether the source supports DP++. This means that active adapters are more expensive than passive adapters.