1 of my 2 HD4890 cards in crossfire - had a fan failure. I looked at replaceing the fan, but it seemed more expensive than if I bought a new card.
So I discarded the card, and bought a R9 280X specifically because it was claimed it could suport 3 monitors without Display Port - which is exactly what I have. I thought a nice way to get rid of the second card altogether.
Now it turns out that the R9 280X only supports 3 non-display port monitors if 2 monitors are identical (something about only 2 timing chips). I wish this had been stated somewhere other than complaints on forums that it does not work.
So, now to get all 3 monitors to work, I need to reinsert the HD4890. I install the driver (Windows 7 Home Premium) and all three monitors function fine.
The moment I try access CCC after the 3rd monitor on the HD4890 is installled, it wont open at all. I have to disable the 4890 in deice manager, and reinstall the R9 280X driver, before I can use the CCC again.
Any help please?