Eyefinity Problem with Setting up 3 monitors AMD HD 7850

[TheBlazeJp]

If anyone could help or give some advice It would be most appreciated

I am trying to set up my desktop to run 3 monitors through eyefinity
I have a Radeon HD 7850

In my Catalyst Control Center it won't show me all 3 monitors, It doesn't seem to pick them up.
However when i right click the desktop and go into Screen resolution all 3 are available to choose from.

My 1st and 2nd monitor are set up via DVI and VGA inputs.
My 3rd uses a Display port to HDMI cable input.

Maybe there is something I am doing wrong or haven't done?

My specs:



I appreciate any help, I am not an expert with computers and I'm sure there is something I am not doing correctly.

[Haldi]

What connection do you use on you GPU ?

1x DVI to DVI monitor
1x HDMI to HDMi Monitor
1x DVI with adapter to VGA Monitor ?

If yes, that doesn't work! only sapphire FLEX cards support that setup!
If you want to use 3 or more Monitor you're limited to 2x DVI or 1x DVI + HDMI Output on your GPU!

[TheBlazeJp]

AMD HD Radeon 7850

1 x DVI to DVI
1x VGA to VGA
1 x Display Port to HDMI

I use the DVI, VGA and Display port on the 7850

This is what I read that should work.

I had to buy the Display port - HDMI cable because on the AMD website it sais thats what was needed for 3 monitors for my card

[TheBlazeJp]

What connection do you use on you GPU ?

1x DVI to DVI monitor
1x HDMI to HDMi Monitor
1x DVI with adapter to VGA Monitor ?

If yes, that doesn't work! only sapphire FLEX cards support that setup!
If you want to use 3 or more Monitor you're limited to 2x DVI or 1x DVI + HDMI Output on your GPU!

No I don't use that,
I use:

1 DVI to DVI monitor (24")
1 DVI-Convertor-VGA to VGA monitor (24")
1 Display port to HDMI Television (24")

[Haldi]

Are you sure that this is an active DP -> HDMI adapter ? Try using only the DVI + HDMI Monitor and see if that works in extended mode, then plug the vga monitor and see what happens.

[TheBlazeJp]

Are you sure that this is an active DP -> HDMI adapter ? Try using only the DVI + HDMI Monitor and see if that works in extended mode, then plug the vga monitor and see what happens.

http://www.ebay.co.uk/itm/280963106126? ... 1439.l2649

Thats what I'm using, perhaps thats the problem?

What is this "active" part you speak of?

[Haldi]

There are Activ an Passiv Adapters out there!
An Active Adapter means that your GPU gives a Displayport Signal, this is converted by the chip in the adapter into a HDMI signal.
A Passive Adapter means that your GPU gives a HDMI signal out trough the Displayport connection which uses a Displayport to HDMI cable.


In this case it seems you have a Passive Cable and not an Active Adapter.

Few years ago you needed an USB Powered Active adapter, nowadays you find Active adapter who work with the internal Voltage the Displayport provides.

[LuckyNoS7evin]

There are Activ an Passiv Adapters out there!
An Active Adapter means that your GPU gives a Displayport Signal, this is converted by the chip in the adapter into a HDMI signal.
A Passive Adapter means that your GPU gives a HDMI signal out trough the Displayport connection which uses a Displayport to HDMI cable.


In this case it seems you have a Passive Cable and not an Active Adapter.

Few years ago you needed an USB Powered Active adapter, nowadays you find Active adapter who work with the internal Voltage the Displayport provides.

Active adaptors are usually like 3 times the price too!!

This is the mini DP adaptor I got for my 7950 http://www.ebuyer.com/340944-mini-displayport-to-dvi-active-adapter-mdp2dvis no I did not pay £38/$60(ish) I paid about £15 as they had them on special!

[f1kid]

Active adaptors are usually like 3 times the price too!!

http://www.ebay.co.uk/itm/Sapphire-Acti ... 589c04f1f3

20£


my 1st post here when i 1st set up my 3 screens i had same problem one would not work then found out you need a active adapter works mint now .............. payed around 20£ did shop around lol

[marton]

I don't know what to think by now,...
I've a HD 7850 with 3 LG E2341v monitors connected (2 by DVI and the third using HDMI),...
The three of them are perfectly working (right out of the box) on my linux setup, but when i boot up on windows,... crap,... I guess is the driver that forces me to choose 2 of them, not finding a way that lets me use the three of them...

If you tell me that I need a Active DisplayPort ,... then why does it work on linux without a problem?

Any idea of how can I tweak the driver? I don't need eyefinity (I find it pointless, since I use it for software development)

Thx a lot in advance,...

[paulstung]

You can always just extend the display to give you an eyefinity effect, in the resolution settings. I've noticed when I come out of my Eyefinity group I only have 2 monitors reconised I have to mess around to get the 3rd running again. I can't remember off hand the full process, it will reconise though just tyrial and error.

[ICE-Logix]

To run 3 in windows one must be display port, to run 4 then 2 must be display port and so on...

u can use active display port adapters, mine cost me 25 bucks..

Dunno Linux but i know windows...

Works great

[youtube]http://www.youtube.com/v/QNtaJu6fkuI[/youtube]