R9 280x 3 monitor

[koczki]

Hello All

Could someone help me with my problem.
I just bought 3rd monitor lg 22ea63 and I connect it to graphic card and .... windows cannot use it.

System see all 3 monitors but I can use only two, all 3 monitors are lg 22... and have dvi, hdmi and vga output.
I use 2xDVI-HDMI and one DP-hdmi cable to connect it to graphic card.
I already read few different forums and try to resolve problem on my own but with no result.

Does the problem is related with cables ? Should I use 2x DVI-DVI and one DP-HDMI ?

I will be grateful for you help, regards.

[HiVizMan]

In CCC what options do you have for the monitors.

Which cable connection is not being picked up?

The bottom line is you will need an active display port cable for the third monitor to be picked up.

http://www.anandtech.com/show/7400/the-radeon-r9-280x-review-feat-asus-xfx/3

Up to 6 displays with the use of a DP MST Hub

[DekonX]

It honestly depends on the video card. My 280x will let me use both dvi + hdmi because they are on separate channels.

Usually its DVI + hdmi on the same channel then you have DP on a separate channel. It really depends on the card you have though because every manufacturer is different. While they can all be R9 280x's it doesn't mean that they will all have and do the same thing. check the manufacturer's spec sheet, and or consult the forums specific for that brand card. You might find that you have to update drivers or something for it to work properly or that you need to use specific display ports, or that for eyefinity you can only use display port for over 2 monitors.

Again, I cant say that any of these ARE the reason, I just know certain cards are different than others.

[koczki]

Thank you all for your help.

I read some more and as you @DekonX write before, the same card but different spec.

But regarding to my card spec I should be able to connect 3 monitors to 2xdvi + hdmi, but it still doesn't work.

As well I read something more about active display adapter, I admit that could be a resolution.

Thank you for help i will buy active adapter and check if it's working.

Regards