Posted on 2014-03-06
I own a Dell OptiPlex 9020, Windows 7 Pro 64 bit with 2 AMD Radeon HD8490 graphics cards -- each card has a DVI and display port each, both set for max resolution 2540 x 1600
I have 3 Dell U2713HM monitors with max resolutions of 2560 x 1440. The 2 monitors plugged into the DVI port with the dual link cable work fine at the max resolution -- the third one is the problem. It is connected to the display port on one of the cards with a dual link DVI cable attached to an Accell DVI to DP adapter (powered thru USB port) (Accell UltraAV DP to DVI-D p/n:B087B-002B). The max resolution I get on this 3rd monitor is 1600 x 1200, no matter how I try it -- I switched cables, changed ports, used display port on the chassis, other card, changed the Accell adapter (I have 3), changed the dual link DVI, but to no avail -- I have the same setup on another system, where it works fine, so I know it can be done ... I just can not seem to make it work on this new system. Any help would be much appreciated ....