HDMI to DisplayPort (DP) Adapter Conversion Information

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Incompatible adapters are being used.

HDMI to DisplayPort Conversion

There has been some confusion when using HDMI to DisplayPort (DP) or the opposite way adapters on Dell computers. There are two types of conversion adapters that can be used, the first is an active adapter, and the second is a passive adapter type. Most adapters only carry a one-way signal.

What is the difference between a passive and active DisplayPort converter?
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.

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 must use 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.

• Active Adapter:
  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.
  
  If you want to use multiple monitors with the same computer. You should use an active adapter because some video cards cannot run the maximum number of monitors while using DP++. This is especially true if the computer has more than one DisplayPort or Mini DisplayPort connection. Check with your video card manufacturer to confirm which type of adapter you need for the setup that you would like to run (Figure 1 & 2).
  
  (Figure 1)
  
  
  (Figure 2)
   
• Passive Adapter:
  Passive adapters are less expensive since they do not need to include additional chips (Figure 3). To check whether you can use a passive adapter, is to see if the DisplayPort, or Mini DisplayPort source has the DP++ symbol above it. The symbol is a D with a P inside, with two + signs to the left, one on top of the other (Figure 4).
  
  (Figure 3)
  
  
  Figure 4

More Information

More information about HDMI and DisplayPort can be found in the links below:

• Display Port Wiki
• HDMI Wiki
• Display Port Frequently Asked Questions
• What is the Difference Between a Passive and Active Display Port Converter?

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