DisplayPort is a new digital video and audio connection standard designed by the Video Electronics Standards Association (VESA). It is a royalty-free technology designed primarily for the computer industry but also compatible for home theater application. The format supports both digital video and audio using a single cable.
Here's a simple solution for connecting your DisplayPort equipment devices using HDMI cables to your exisiting HDMI devices. This simple adapter is all you need to convert from one format to the other.
Using the DisplayPort to HDMI adapter, you can transmit audio if your graphics card support audio output through the DisplayPort connector. Using this adapter with an HDMI to DVI cable to connect to a DVI display it will only transmit video.
Max Resolution Supported : 1920 x 1080 (1080p) FullHD
Note!! This is a passive adapter. While DisplayPort connectors are capable of passing an HDMI signal, DisplayPort and HDMI signals are basically different and not compatible with each other. This adapter does not actively convert a DisplayPort signal into an HDMI signal. In order for this adapter to function properly, you must have a DisplayPort source device capable of producing and passing out an HMDI signal through the DisplayPort jack.
DisplayPort was primarily designed as a replacement for VGA, DVI and LVDS which are common interfaces used in the computer / IT industries, while HDMI was developed by the Consumer Electronics Industry specifically for Home Theater applications. Toward this end, DisplayPort has certain enhanced features such as direct drive monitor design and single cable multi-function monitor connectivity. Some advantages of HDMI are the ability to support xvYCC color, Dolby TrueHD and CEC (Consumer Electronics Control) signals.
*NOTE* ATI Eyefinity: You will need an active displayport adapter which is USB powered for ATI Eyefinity Graphics cards since this passive / cable adapter will not work for ATI Eyefinity. It works with any displayport Macbook and ATI / Nvidia cards with a displayport that is not Eyefinity enabled and any device that can send a HDMI signal via the mini-Displayport port.
Though both share powerfull A/V features, DisplayPort was designed to complement HDMI, not to replace it.