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Active mini display port

Althire

Althire

Althire

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Joined
3 Jul 2012
Posts
31
Hi all am looking for a bit of advice on buying an active mini display port adapter and am not sure which one and why one I have already bought does not work.

I am running a HD7850 and trying to get eyefinity working so I can run 3 monitors I have 2xVGA monitors and 1xHDMI I currently have the HDMI in the HDMI port 1 of the VGA's in the DVI port with an adapter and I was looking at connecting the 2nd VGA to the mini display port via the active adapter and a DVI to VGA converter.

I have tried this however the monitor is detected by the card but does not come off standby I am using Startech Mini DisplayPort to DVI Active Adapter which is similar to HIS Active Mini DisplayPort the only issue I see is that when using the VGA to DVI connector it has 4 pins around the horizontal pin that the active adapter does not have is this the issue? As the only active adapter I can find with these holes is one for a display port not mini display this one HIS Active DisplayPort

A lost and confused.

Althire.
 
It is becasue of those pins as you pointed out. The reason the DVI>VGA adapter works on the card's DVI connector is that the card detects the adapter and the card itself outputs an anaolog signal instead.
That active displayport adapter you have converts through a powered chip the DP signal to digital DVI only.


You would want in your scenario an active DP>HDMI converter, and to use the 2 DVI connectors with DVI>VGA adapters.


This is something AMD could do a lot better in explaining. Its actually one of those cases where detailing what the card can and can't do and some basics why would actually be more helpful and less confusing than the "if this, use this" advice they have instead.
 
eddyr said:
It is becasue of those pins as you pointed out. The reason the DVI>VGA adapter works on the card's DVI connector is that the card detects the adapter and the card itself outputs an anaolog signal instead.
That active displayport adapter you have converts through a powered chip the DP signal to digital DVI only.


You would want in your scenario an active DP>HDMI converter, and to use the 2 DVI connectors with DVI>VGA adapters.


This is something AMD could do a lot better in explaining. Its actually one of those cases where detailing what the card can and can't do and some basics why would actually be more helpful and less confusing than the "if this, use this" advice they have instead.
Click to expand...

Well that is an issue again as the card I have only has 1xDVI 1xHDMI and 2xmini display port so what would I need for that :(.
 
For Eyefinity you have to use one mDP input.

I'm not sure how well two adaptors together will work...

The AMD card sockets aren't the most helpful in the world but that's the only way I can see it working. You've got to get a VGA into mDP somehow. I would wait for someone to reply who has daisychained some adaptors in a similar way.
 
Passive Displayport to VGAs work. I have a Dell one for my third monitor. When eyefinity first came out everyone discovered we could just use a cheap passive DP to VGA adapter instead of the instead of the insane expensive DP to dual link DVI adapter. This was before the cheap DP to single link DVI adapters came out.

List of validated dongles here: http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx
 
Althire said:
Well that is an issue again as the card I have only has 1xDVI 1xHDMI and 2xmini display port so what would I need for that :(.
Click to expand...

As rusty says, it looks like you'll need an active mDP>VGA converter.


Orcvader said:
Passive Displayport to VGAs work. I have a Dell one for my third monitor. When eyefinity first came out everyone discovered we could just use a cheap passive DP to VGA adapter instead of the instead of the insane expensive DP to dual link DVI adapter. This was before the cheap DP to single link DVI adapters came out.

List of validated dongles here: http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx
Click to expand...

From my reading about when trying to get my 3 monitor setup to work, I believe that was as some of the dongle's while labelled as passive (depending on chip) were still actualy converting the signal. For the 3rd monitor (if non DP monitor and using the DP connector) you need some from of conversion.
 
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Orcvader said:
Passive Displayport to VGAs work. I have a Dell one for my third monitor. When eyefinity first came out everyone discovered we could just use a cheap passive DP to VGA adapter instead of the instead of the insane expensive DP to dual link DVI adapter. This was before the cheap DP to single link DVI adapters came out.

List of validated dongles here: http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx
Click to expand...

Can you advise on one from overclockers that would work if not too much trouble to ask :).
 
I have now found and ordered one from the list you put up from AMD it arrives tomorrow lets just hope it works fingers crossed ^^.

Gold Startech MDP2VGA 1920x1200
 
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