I'm so confused... I bought a Dell Monitor so I can extend the display from my 2009 Intel Core2 Duo iMac. The iMac has a mini display port and the Dell monitor has a DVI-D with HDCP (dual link) port, a DisplayPort, and a VGA port. A cable with two DVI-D (single link) connectors plus a VGA cable were in the box. The resolution on both the iMac and the Dell monitor is 1920x1200 and I want to keep them the same. Isn't the DVI connection the way to go? Is there a problem that the Dell monitor is dual link and the cable single link? Most important, what adapter will I need to connect my iMac and the Dell monitor correctly?