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HP DC7900 can I use a dual screen?


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#1 mystic12

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Posted 18 January 2016 - 02:22 PM

Hello all, I would like to use two monitors each for separate applications. Since this pc does not have an extra video port, is there any way I can achieve this please?


Edited by hamluis, 20 January 2016 - 06:10 PM.
Moved from Win 7 to Internal Hardware - Hamluis.


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#2 KristianLJ

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Posted 18 January 2016 - 05:05 PM

Yes it is possible to by a USB external graphics card. I have used one previously to add a 3rd screen to my setup. They are not amazing quality as it runs over USB but did the job. 

 

A quick search of google for startech USB to VGA will being a few up 



#3 mystic12

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Posted 18 January 2016 - 05:48 PM

So I can buy something like this to try out first?

 

http://www.ebay.com/itm/Startech-USB2VGAE2-USB-to-VGA-External-Video-Card-Multi-Monitor-Adapter-16MB-/231726513220?hash=item35f3f9fc44:g:9d4AAOSwyQtV31p7

 

If yes, I should not have any issues achieving what I want with win7?



#4 KristianLJ

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Posted 19 January 2016 - 01:56 AM

Windows 7 is compatible, any drivers and / or software can be downloaded from Startech's Website http://www.startech.com/Downloads

 

But they usually are plug and play



#5 mystic12

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Posted 19 January 2016 - 05:59 AM

Got it, appreciate the help!



#6 TsVk!

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Posted 19 January 2016 - 11:34 PM

Buy an internal PCI graphics card rather. Faster and more stable. I had about 50 dc7800's under my care until I phased them out last year, many had additional graphics cards installed.

 

Cheap ones can be had for <$50 these days.



#7 TsVk!

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Posted 20 January 2016 - 12:47 AM

I just remembered. There is a DisplayPort connection on those machines. you can directly hook up a second monitor with the correct cable, without additional hardware.



#8 mystic12

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Posted 20 January 2016 - 11:55 AM

Yes, I am seeing a display port connection in the manual and also dual monitor support but as the image of the back of the unit shows in the link below:

 

http://i493.photobucket.com/albums/rr298/mikehende/2016-01-20%2011_39_52-HP%20DC7900%20SFF%20Intel%20Core%20Duo%202%20E8400%203%2000GHz%202GB%20RAM%20DVD%20Drive%20No%20Hard%20Drive%20_%20e_zpsw4sst1y6.jpg

 

It should be what looks like an HDMI port to the left of the VGA port with the letter D or P? If yes, then as you say all I should need is to find out what cable exactly I will be needing but since this unit is no longer under warranty, how would I get that info, any ideas please?



#9 TsVk!

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Posted 20 January 2016 - 04:06 PM

Yeah, it looks like a HDMI port with the corner cut off. The one to the left of the VGA port...

 

You can buy a DisplayPort to VGA or DVI cable. They cost less than $5 in Australia.

 

https://www.macfixit.com.au/displayport-male-to-dvi-male-28awg-cable-gold-plated-connectors-6ft/?dfw_tracker=2175-130&gclid=CLjLlrqlucoCFZCUvQodWFEH8g



#10 TsVk!

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Posted 20 January 2016 - 04:11 PM

Of course you'll need to find one local that suits you. Don't be fooled into paying $25, they are not worth that even though some would try.



#11 mystic12

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Posted 20 January 2016 - 04:42 PM

I have already purchased the Startech product mentioned earlier but I will get this one too to see which works best and this should be the better option. Can you confirm if this is will work please?

 

http://www.ebay.com/itm/Black-DP-DisplayPort-Male-to-VGA-Female-Converter-Adapter-Cable-For-PC-Laptop-/321732198363?hash=item4ae8bbbfdb:g:gSoAAOSwstxVNb0H



#12 TsVk!

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Posted 20 January 2016 - 04:51 PM

Yes it will work. You are better buying a single piece cable if you can though. Less connections and less interference.

 

The USB device you bought will not support very good graphics though, you may or may not find it works suitably for your applications.



#13 mystic12

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Posted 20 January 2016 - 05:02 PM

 You are better buying a single piece cable if you can though.

 

Thanks but not understanding the difference between the cable I just linked to on ebay and what you've written above?



#14 TsVk!

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Posted 20 January 2016 - 05:26 PM

The device you linked above is an adapter and will work, but you will need to attach a cable to it. If you look in the link I provided the cable is all that is required.

 

It's neither here not there in terms of functionality, but using an adapter will add another unnecessary point of possible failure to your system.



#15 mystic12

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Posted 20 January 2016 - 05:31 PM

Oh, I see what you mean, yes, definitely a better option, just need a longer cable:

 

http://www.ebay.com/itm/Rosewill-RCDC-14013-3-Foot-DisplayPort-to-VGA-Cable-28-AWG-Male-to-Male-/381043267243?hash=item58b7f2d6ab:g:7u0AAOSwQItT5Rd~






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