It's not uncommon as we upgrade parts of out computers to need adapters and other gear to make things work together. If you have your eyes set on a new display for your computer that uses DisplayPort and your machine lacks the right output Atlona has a new adapter just for you.
The adapter is called the AT-DP400 dual link DVI to Mini DisplayPort Converter. The converter is USB powered and works with Mac or PC systems. The device is specifically designed to work with the 27-inch iMac computer with resolutions up to 2560 x 1440. The screen connected to the adapter can be used as a main display or have the desktop extended to it.
The adapter is HCDP compliant and it also supports the 2560 x 1600 resolution that 30-inch LCDs use. The adapter will also let PS3 and Xbox users connect the consoles to the iMac without additional hardware at a resolution of up to 720p. The adapter is up for pre-order for $199 and is expected to ship on March 10.