How to run 3 screens off R9 280x?

Toggle sidebar Toggle sidebar
W

wotwotwotwot

Reputable
Sep 17, 2014
37
0
4,530
I've got 3 screens that all work on my computer but only two at a time. One must always be disabled for the other two to work. What can i do to fix this? I have two 1080p monitors and one 1080p TV that i'm trying to connect. I have the two monitors in the dvi ports and the TV in the hdmi port. I've seen this graphics card pull off 3 screens so can anyone help me out in understanding how i get it to work with 3 screens? Thanks.
 
Solution
pierrerock
here is your reason i found from anandtech:

Thanks to some firmware and board level changes, with the 200 series AMD is now able to attach multiple TMDS transmitters/interfaces to the same clock generator, allowing one clock generator to be used to drive multiple displays. As a result it’s now possible to drive up to 3 TMDS interface displays off of a single 200 series card, albeit with restrictions.

The catch here is that these can’t be independent displays, and this change is primarily intended towards enabling Eyefinity with cheap, DVI/HDMI-only monitors. To utilize clock sharing and to drive 3 such monitors off of a single card, all 3 monitors must be timing-identical, which functionally speaking almost always requires the...
Click to expand...
Sort by date Sort by votes
pierrerock

pierrerock

Reputable
Jul 4, 2014
898
0
5,660
here is your reason i found from anandtech:

Thanks to some firmware and board level changes, with the 200 series AMD is now able to attach multiple TMDS transmitters/interfaces to the same clock generator, allowing one clock generator to be used to drive multiple displays. As a result it’s now possible to drive up to 3 TMDS interface displays off of a single 200 series card, albeit with restrictions.

The catch here is that these can’t be independent displays, and this change is primarily intended towards enabling Eyefinity with cheap, DVI/HDMI-only monitors. To utilize clock sharing and to drive 3 such monitors off of a single card, all 3 monitors must be timing-identical, which functionally speaking almost always requires the monitors to be completely identical. Furthermore the sharing of the clock generator can only be engaged/disabled upon boot, so the 3rd display cannot be hot-plugged and must be present at boot time. Consequently this is by no means as unrestricted and easy as having native support for 3 TMDS interface displays, but for Eyefinity it will get the job done.

Of course this restriction only applies to using 3 TMDS interface monitors off of a single card natively. Using the DisplayPort, either with a native monitor or through an active DP-to-DVI/HDMI adapter, still allows the same fully independent functionality as before.
Click to expand...

So short story, you system will only work with 3 monitor with eyefinity if all three monitor are identical. You HDTV will not work with this setup unless you buy another card.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom