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Active vs. Passive Displayport adapters *the truth* - Page 7

post #61 of 115
It is not, read the reply's... you just need 1 Active DP- whatever connection you got and the rest can be passive up to 3 screens total! 1 (One) actve DP-DVI or whatever and 2 (Two) DP-DVI of whatever type! If you want 4 or more screens you'll need a DP-whatever dongle. smile.gif
post #62 of 115
Quote:
Originally Posted by Panickypress View Post

It is not...

Who are you even talking to? Also it sounds like you think everyone has the same card as you. For example the hd5850 only has 1 DP.
post #63 of 115
Del
post #64 of 115
post #65 of 115
Now, I got opposite request, which means that I am in need of DVI or HDMI to DP converter...I can see DP to either but not other way...reason, 3 DP monitors and only 2 DP on my card but unused HDMI and DVI ports, therefore instead shelling out for another card I would prefer to get converter!
Anyone?
post #66 of 115
Quote:
Originally Posted by Heidi View Post

Now, I got opposite request, which means that I am in need of DVI or HDMI to DP converter...I can see DP to either but not other way...reason, 3 DP monitors and only 2 DP on my card but unused HDMI and DVI ports, therefore instead shelling out for another card I would prefer to get converter!
Anyone?

Interesting problem you got there.
You could try a cheep Passive DP > HDMI/DVI (Connecting the DP side to the monitor,
and then use a HDMI/DVI cable to the pc), and see if that works.

As the the two first two monitors are DP connections and no conversion was done(No clocks used).

In other news: I'll try to make a descriptive depiction of the DP problem(It's a bit simplified).
GPU HDMI > HDMI monitor (First clock used)
GPU DVI > DVI monitor (Second clock used)
GPU DP > Passive DP to HDMI/DVI > HDMI/DVI monitor (No clocks left)
This gives you a Black screen(As it needs one of the two used clocks)

As you can see the passive adapter only connects the two ports,
and the GPU have to user a clock to do the converting.
GPU HDMI > HDMI monitor (First clock used)
GPU DVI > DVI monitor (Second clock used)
GPU DP > Active DP to HDMI/DVI > HDMI/DVI monitor (No clocks needed)
This gives you a working image(As the active DP>HDMI/DVI made the conversion)

Here the GPU doesn't need to convert anything(So no clocks needed),
as the active DP does the converting.
If you have a monitor that needs DVI dual link(All the pins in a DVI)
then you need adapter that is also USB powered.
DVI dual link delivers double the bandwidth vs normal DVI single link,
and is often used for 3D and high resolution(Way over 1080p) monitors.

I hope it helps anyone that still are confused about DP to DVI/HDMI and VGA for that matter.
Edited by muuu - 5/5/13 at 1:17am
post #67 of 115
I have an HP AMD Radeon HD 7770 and want to run 3 monitors.

Could i run three monitors using a MST splitter on this Graphics Card?
post #68 of 115
Heres a question what if i have two monitors connected through dvi and then use a displayport cable to go from a display port in on my (dell2312) to my 7970 (out)?

dis a normal displayport cable have to be active? or is it already active I'm kinda confused
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post #69 of 115
Quote:
Originally Posted by Mattbag View Post

Heres a question what if i have two monitors connected through dvi and then use a displayport cable to go from a display port in on my (dell2312) to my 7970 (out)?

dis a normal displayport cable have to be active? or is it already active I'm kinda confused

anybody have an answer for this one?
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post #70 of 115
Quote:
Originally Posted by Mattbag View Post

Quote:
Originally Posted by Mattbag View Post

Heres a question what if i have two monitors connected through dvi and then use a displayport cable to go from a display port in on my (dell2312) to my 7970 (out)?

dis a normal displayport cable have to be active? or is it already active I'm kinda confused

anybody have an answer for this one?


If you have a display port built into your panel, it is already active. You would only need a cable to go from DP to DP or mDP to DP, etc etc.


Btw, what makes an ADAPTER active is the circuitry inside the adapter. With panels with built-in DP, the circuitry is already there.
Edited by tsm106 - 6/8/13 at 8:23pm
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