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 Post subject: 3monitors and xfx 7870
PostPosted: Sat Aug 10, 2013 6:14 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
Im having some troubles with connecting all 3 of my Samsung monitors
Monitor 1-hdmi
Monitor 2-hdmi to dp adapter
Monitor 3-hdmi to dp adapter/DB15pin to dvi

And I only get 2 screens on at all times and I cannot seem to get the disabled screen duplicated and it just says replace or extend with no luck. Could it be my adapter is wrong or am I doing something wrong??

http://www.homedepot.com/p/CE-TECH-Mini ... gbwpqjn-Ag


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Sat Aug 10, 2013 7:54 pm 
Team Member
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So Monitor #1 is HDMI-HDMI from Video card to Monitor?
#2 is Mini-Display Port from Video Card to HDMI on the Monitor
#3 is Mini Display Port on the video card to VGA adapter to DVI adapter to HDMI on Monitor? I would say this is probably the issue way too many adapters. Is there a reason you aren't running DVI from the video card to the DVI Port on the monitor or DVI on the video card to HDMI on the monitor?


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Sat Aug 10, 2013 7:59 pm 
Sharptooth
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Location: USA
nsvander wrote:
So Monitor #1 is HDMI-HDMI from Video card to Monitor?
#2 is Mini-Display Port from Video Card to HDMI on the Monitor
#3 is Mini Display Port on the video card to VGA adapter to DVI adapter to HDMI on Monitor? I would say this is probably the issue way too many adapters. Is there a reason you aren't running DVI from the video card to the DVI Port on the monitor or DVI on the video card to HDMI on the monitor?


On my new monitors they only have VGA and HDMI. I just bought a hdmi cable that goes into dp and still no luck. And with my 7870 only the top DVI port can convert DVI to VGA. And with the hdmi to dp cable I still have no luck with out one or the other screen going out like atm I have the #1 hdmi to hdmi and #2 hdmi dp cable monitors working but not the VGA to DVI


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Sat Aug 10, 2013 8:08 pm 
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Are your adapters active adapters?

http://support.amd.com/us/eyefinity/Pages/eyefinity-dongles.aspx


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Sat Aug 10, 2013 8:11 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
nsvander wrote:


Well the hdmi to dp is one whole cable and the dvi to vga is the adapter that came with the video card.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 1:36 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
#1 HDMI---------->Working
#2 VGA to DVI-D---------->Working
#2 VGA->DVI->DVI-D to mini DP and still --------->nothing.
#3 HDMI to DVI-D to mini DP(ACTIVE by accell mini DP to DVI-D)---------->And this screen is not even being detected
#3 VGA->DVI->DVI-D to mini DP and still---------> nothing.

What am I doing wrong, like their is no signal no nothing and I also have done the connecting only the active adapter and restarting and still nothing.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 5:36 pm 
Sharptooth
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Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
TTT


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 6:46 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
Could it be my monitors and I need a dual link active adapter? S22C350.

Also here is my comp specs
-Q6600 3.4
-PSU 550watt
-Asus maximums formula
-XFX HD7870 2GB


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 6:53 pm 
Smithfield
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Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5069
The ones that aren't working I believe you have too many adapters. And some of them don't even carry the correct signal. For instance, HDMI and DP do not have a VGA signal even though their DVI adapters support all of the pins. Picking from the lot, I'm going to infer your card as 2 DVI, 1 HDMI, and 1 DP... So if you have something that requires VGA, then convert it from one of the DVI ports. Otherwise, it's best to not convert at all.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 8:40 pm 
Sharptooth
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Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
LatiosXT wrote:
The ones that aren't working I believe you have too many adapters. And some of them don't even carry the correct signal. For instance, HDMI and DP do not have a VGA signal even though their DVI adapters support all of the pins. Picking from the lot, I'm going to infer your card as 2 DVI, 1 HDMI, and 1 DP... So if you have something that requires VGA, then convert it from one of the DVI ports. Otherwise, it's best to not convert at all.


I was thinking the same thing as well but only 1 of the 2 dvi ports can convert to VGA. But to me it seems that my active adapter which is from mini dp to DVI-D then to VGA and or hdmi(Which as well doesn't work) isn't functioning. I tried to update the firmware but it says that their isn't a active dp to begin with.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 10:30 pm 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
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So... All your monitors are VGA only?


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Mon Aug 12, 2013 11:08 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
LatiosXT wrote:
So... All your monitors are VGA only?


Well VGA and HDMI which makes no sense since these screens are brand new by Samsung and their LED. Could it be that I have to roll back my drivers like it says on the accell website?


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 8:15 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5069
It would be better to use the HDMI port then since it's a DVI signal anyway. So:

#1: DVI -> HDMI
#2: DVI -> HDMI
#3: HDMI or DP -> DVI -> HDMI


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 10:56 am 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
LatiosXT wrote:
It would be better to use the HDMI port then since it's a DVI signal anyway. So:

#1: DVI -> HDMI
#2: DVI -> HDMI
#3: HDMI or DP -> DVI -> HDMI


But doesn't the 3rd monitor have to be active dp and also would that even matter if my active dp isn't working even tho it doesn't function when it is the only monitor plug in when turned on?


Last edited by ninjastar on Tue Aug 13, 2013 11:24 am, edited 1 time in total.

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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 11:09 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5069
No, there are passive DP->DVI converters


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 11:25 am 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
But to connect the 3rd monitor it has to be a active adapter??


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 11:38 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5069
No.

Just don't use DP at all.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 12:00 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
Connecting multiple monitors for AMD Eyefinity technology couldn’t be simpler. There are four easy rules to remember:
1.The first two monitors can connect to the graphics card with any display output on your product: HDMI, VGA, DVI or DisplayPort.
2.The third (or greater) display must be connected to the graphics card via DisplayPort.
3.If your monitor does not have a DisplayPort connection, you will need an inexpensive active DisplayPort adapter for it. DVI to DP adapters can be had for less than $30 USD.2
4.Every family of GPUs supports a different maximum number of displays.


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 12:02 pm 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5069
Oh, forgot about that. Anyway, whatever, just find a DP->DVI adapter and plug it in a DVI->HDMI adapter. It doesn't have to be an active adapter.
Wikipedia wrote:
The DisplayPort signal is not compatible with DVI or HDMI. However, Dual-Mode DisplayPorts are designed to transmit a single-link DVI or HDMI 1.2/1.4 protocol across the interface through the use of an external passive adapter that selects the desired signal and converts the electrical signaling from LVDS to TMDS. VGA and dual-link DVI, on the other hand, require active adapters to convert the protocol and signal to the desired output and do not require dual-mode DisplayPorts. VGA adapters are powered by the DisplayPort connector, while dual-link DVI adapters may rely on an external power source (see compatibility with HDMI, DVI and VGA).[9]


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 Post subject: Re: 3monitors and xfx 7870
PostPosted: Tue Aug 13, 2013 12:26 pm 
Sharptooth
Sharptooth

Joined: Wed Jan 23, 2008 5:02 pm
Posts: 426
Location: USA
Ive tried it with a passive adapter and no luck. I can only get 2 screens working at a time and I could switch between all three monitors but only have 2 on at the same time


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