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RX 480 DisplayPort-to-VGA, can't detect monitor


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#1 bsommerhalder

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Posted 21 November 2017 - 02:48 PM

Hi there, stumped and hoping for some help!

I just purchased this PC with an RX 480 card: https://www.newegg.ca/Product/Product.aspx?Item=N82E16883795904

I have two VGA monitors I want to connect to it. I purchased two of these active DP-to-VGA adapters:https://www.newegg.ca/Product/Product.aspx?Item=N82E16812423001

However, my computer does not detect any of my VGA monitors when I connect them using these adapters. The graphics card does work, as I am able to use my TV as a display using the card's HDMI port.

I understand that passive adapters would not work, but these active adapters should, from what I have read.

I have updated my Radeon drivers to the latest.

Thanks in advance!!



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#2 MadmanRB

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Posted 21 November 2017 - 03:33 PM

Can you give us details on the monitors you are using?


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#3 bsommerhalder

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Posted 21 November 2017 - 03:40 PM

Can you give us details on the monitors you are using?

I have tried several monitors, the one I cam currently testing with (with my TV plugged into HDMI as primary) is an Acer G205HL

 

https://www.amazon.com/Acer-G236HL-Bbd-23-Inch-LED-Lit/dp/B0098Y77U0

 

I'm sure if I can get this one to work with the DP-to-VGA method, I will have my solution (note that the monitors I want to use are VGA-only, so a DVI workaround won't work for my final solution)



#4 MadmanRB

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Posted 21 November 2017 - 03:45 PM

Well if you can tell us the monitors you do want to use here we can cook up some solutions.

You may just want to go Displayport to VGA via a cable as opposed to a adapter


Edited by MadmanRB, 21 November 2017 - 03:46 PM.

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#5 bsommerhalder

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Posted 21 November 2017 - 03:48 PM

Well if you can tell us the monitors you do want to use here we can cook up some solutions.

They are I-INC iH191ABB (X2):

 

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5708926

 

Many thanks in advance



#6 MadmanRB

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Posted 21 November 2017 - 03:53 PM

I am guessing you had those laying around from a old setup.

You may want to try this instead:

 

https://www.amazon.com/CableCreation-DisplayPort-Cable-Plated-Standard/dp/B01COIS7KK/ref=sr_1_2_sspa?s=electronics&ie=UTF8&qid=1511296964&sr=1-2-spons&keywords=displayport+to+vga&psc=1

 

Just keep in mind you may want to get newer monitors here soon, or just use your TV as this is a crazy mismatch.

I mean you are plugging a modern machine into no name monitors made several years ago.

I mean I have seen some good setups using old dell monitors but this sort of thing really is a mismatch.


Edited by MadmanRB, 21 November 2017 - 03:55 PM.

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#7 bsommerhalder

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Posted 21 November 2017 - 04:02 PM

I am guessing you had those laying around from a old setup.

You may want to try this instead:

 

https://www.amazon.com/CableCreation-DisplayPort-Cable-Plated-Standard/dp/B01COIS7KK/ref=sr_1_2_sspa?s=electronics&ie=UTF8&qid=1511296964&sr=1-2-spons&keywords=displayport+to+vga&psc=1

 

Just keep in mind you may want to get newer monitors here soon, or just use your TV as this is a crazy mismatch.

I mean you are plugging a modern machine into no name monitors made several years ago.

I mean I have seen some good setups using old dell monitors but this sort of thing really is a mismatch.

 

Is there a reason why this cable would work opposed to the adapters I am using? I am not sure that the link you provided are "active" adapters, which I understand I would require (these are the ones I am trying to use: https://www.newegg.ca/Product/Product.aspx?Item=N82E16812423001) -- for example, see discussion on this thread: http://www.tomshardware.com/answers/id-3091857/connecting-vga-monitor-480.html

I am using these I-INC monitors because the dual 5:4 monitors are great for my productivity purposes and workspace setup. Someday I will replace them with a single ultrawide, but not today. The PC is primarily for productivity rather than multimedia or gaming,



#8 MadmanRB

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Posted 21 November 2017 - 04:23 PM

Well you are jerry-rigging here, i mean it would not hurt to try it.

Still though for productivity you still may be better off using that TV, its got a far better resolution and would not be a detriment to that GPU you have.

The RX 480 is certainly a powerful card and using such monitors on it would not suit it.

I know its all for reliability and if its not broke dont fix it and you just spent a ton of money on that machine.

But it seems like such a uneven setup taking such a powerful machine and derping it with outdated monitors.


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#9 mjd420nova

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Posted 21 November 2017 - 05:29 PM

I've tried a lot of workarounds for the multiple monitors and found adapters are not the way to approach,  Maybe one in ten does everything just right and all the signal processors in each display can shake hands and be happy.  HDMI is best but splitters can be hit and miss too.  I usually buy the video GPU card and then get the three that have different ports (VGA, HDMI, DP (DVI) to drive each monitor from a different port.  Sometimes a startup sequence is needed and may even have a time limit between power up and a "missing media" message appears that would require a cycle of inputs find the source. on that display.  HDTVs can be problematic with HDMI ports looking for resolution signals before accepting and displaying media but not always in the correct format.






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