Touble with Eyefinity

[Marcballer]

Hey everyone,

Sorry if this is posted elsewhere, I had a good look around and came up empty all over the net.

I recently bought 3 identical ASUS MX239 monitors and am running a ATI Radeon Sapphire 7900 series (can't quite remember which).

I cant get all three monitors to enable. I can get any 2 running in either duplication or extended modes but it won't allow the third to join in on the fun. The end goal is to have all three running for peripheral vision during gaming.

The result is the same for both the windows screen resolution page and the CCC.

My GPU card has 2X mini ports, 1X HDMI, and 1X DVI(...? the big rectangle with 2 dozen prongs in it). I'm running one of each right now but will likely go and purchase another mini to HDMI for monitors 2 and 3.

I have a feeling I'm missing something pretty basic but I'm stumped.

 

[3DVagabond]

Which card, exactly, and how are you connecting them? What adapters, if any, are you using?

 

[UaVaj]

asus mx239 only has hdmi and dvi input - so chances are you converting display port.

looks like you need an "active" display port to DVI adapter. (~$30 on fleabay)
any cheap "non active" display port to DVI adapter will not work. (~$5 on fleabay)
get an amd approved adapter to avoid any future problem.

 

[Marcballer]

My best guess is the HD 7970 3GB GDDR5 (21197-00). I am using 3 un-adapted cords straight from the card.

Monitor one: HDMI -HDMI
Monitor two: Mini - HDMI
Monitor three: DVI - HDMI

Will loosing the DVI for a second Mini solve it?

 

[UaVaj]

HDMI - HDMI is no problem
Mini - HDMI is adapter/cord sensitive
DVI - HDMI is no problem

monitor two is your problem.
which cord are you using to convert Mini (aka display port) to HDMI?
is it an amd approved cord? not aware of any approved active cord in existence.

save you the trouble.
http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx

http://www.accellcables.com/B086B-003B-2.html
http://www.accellcables.com/B086B-008B-2.html

 

[Marcballer]

I apologise for my ignorance but when I hear "adapter" I think a piece that goes between to different "ended" cables. So if that definition is correct then none. It's simply a cable with HDMI on one end and the Mini on the other, no removable pieces.

 

[UaVaj]

It's simply a cable with HDMI on one end and the Mini on the other, no removable pieces.

such cable will not work.

 

[Marcballer]

With the HDMI and DVI outputs used I need to use one of the mini ports. These cards are designed for up to 4 monitors. What do I require to make it work? An adapter I Imagine?

 

[javier_machuk]

you need something like these: http://www.amazon.com/StarTech-com-M...ini+dp+to+hdmi

Or any other ACTIVE mini dp to hdmi adapter...