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HD7850 - Three displays question

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  • Graphics Cards
  • Graphics
Last response: in Graphics & Displays
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January 28, 2013 11:09:13 AM

Hello!

I have the following situation which I hope someone can assist me with:
on a Sapphire Radeon HD 7850 Dual-X OC I already have plugged in 2 screens using the 2 DVI connectors. The video card has 2 free ports: HDMI and Display Port.
On this video card I also want to connect a TV also.

What kind of cable/connector/adapter will I need in order to be able to use the 3 screens at the same time?

The reason I'm asking is because in some older posts I found different opinions: some saying it will work through HDMI, some saying that I need a display port adapter (and I'd rather not spend money on both of them just to see which one works).

Thanks!

More about : hd7850 displays question

a b U Graphics card
January 28, 2013 11:15:04 AM

the dvi and hdmi that are side by side can not be used at the same time, so for the third monitor you will need a display port to x converter. to avoid flickering and problems with detection, i would only use an amd approved display port adapter.

so possible setups
2 x dvi 1 x display port
1 x dvi 1 x hdmi 1 x display port

http://support.amd.com/us/eyefinity/Pages/eyefinity-don...
a b U Graphics card
January 28, 2013 11:23:42 AM

To connect 3 screens you can use 2 ports of any combination you like but the 3rd on HAS to be Displayport or an active Displayport to DVI adapter.

I would suggest you use DVI,HDMI,DP or DVI,DVI,DP and avoid VGA because then one screen will have poor quality because of the analog signal.
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January 28, 2013 11:44:43 AM

Great, thanks for the answers!

From what I understand, since two screens are connected through DVI, the third one has to go on Display Port.

Which brings me to another question: if I use a 5 meters long HDMI-HDMI cable and to this I attach a HDMI->Display Port adapter which will go into the video card, will there be a problem? Maybe the distance and the adapter could cause significantly lower quality?
a b U Graphics card
January 28, 2013 11:46:46 AM

i think your best option is 1 x dvi 1 x diplay to dvi 1 x hdmi
but the 2 x dvi i x display to hdmi will work fine.
a b U Graphics card
January 28, 2013 1:24:57 PM

aeus said:
Great, thanks for the answers!

From what I understand, since two screens are connected through DVI, the third one has to go on Display Port.

Which brings me to another question: if I use a 5 meters long HDMI-HDMI cable and to this I attach a HDMI->Display Port adapter which will go into the video card, will there be a problem? Maybe the distance and the adapter could cause significantly lower quality?

It's a digital connection, so you will see either the same quality or no picture at all.
!