Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I bought a new monitor 24'' to add to my 2 other monitors (24'' and 26''). They're all 1920*1200, and are all recognized individually, and 2 at the same time can always work (through HDMI et DVI1). My graphic card is an ASUS HD6950 2GB and it has 2 mini Display ports as well as 1 HDMI and 2 DVI. I tried to connect my 3rd monitor through DVI then through the mini display with an adaptor, and in both cases it's recognized but when I try to get to activate the 3rd screen, here's what I get:

  • In Windows resolution config Windows error
  • In Catalyst Control Center Catalyst error

Thanks for your help!!

share|improve this question
Look into Eyefinity that should allow you to support 3 monitors. – Ramhound Dec 5 '12 at 18:32
up vote 3 down vote accepted

With that card, you can't use both DVI ports and the HDMI at the same time.

Also, if you want to use mDP to a DVI monitor, then you need an "active" adapter.

From the manual of a version of your card, here's a chart of acceptable display configurations (second one from the bottom is the 3x DVI monitor configuration your aiming for):

enter image description here

More info here: Active vs. Passive DisplayPort adapters the truth

Including this tid-bit:

Eyefinity requires an ACTIVE adapter to enable a third monitor on HD 5000 cards. Passive will NOT work, except for the first two monitors on the eyefinity 5 and eyefinity 6 cards. For the other three/four monitors, active is still required.

share|improve this answer
Brilliant! Thanks a lot, I wouldn't have understood this chart alone anyway :) I've just ordered an active adaptor (and found on Amazon plenty of comments from people with the same problem). – Nabab Dec 5 '12 at 19:08

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.