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Need help with DVI to DP adapter issue

post #1 of 13
Thread Starter 
I bought a new gtx 780 and I have 2 monitors. The Apple Cinema is only mini DP so I bought and adapter that is mini DP to DP and if I hook it up direct to the card that way it works fine. The Samsung monitor only has HDMI and DP. So I have a DVI-D cable and hooked it up to the DVI-D outlet on the card then I have 2 different DVI to DP adapter's and the Samsung monitor will not be detected with either of them when hooked up with the DVI-D to DP cable and adapter. Any idea as to why. It is not possible that neither adapter works. One is even an Active DP adapter.

I know my active Dp- DVI adapter works because I hooked it up off the card then plugged the DVI-D into my old asus monitor and it works perfect.
Edited by Topgearfan - 6/7/13 at 3:26pm
post #2 of 13
DP to dvi adapters are not bidirectional, unfortunately. What you are trying to do doesn't work.
post #3 of 13
Have you tried the "Activate All Displays" option in the Nvidia CP?
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post #4 of 13
Thread Starter 
Quote:
Originally Posted by kevinsbane View Post

DP to dvi adapters are not bidirectional, unfortunately. What you are trying to do doesn't work.

Even going from DVI-d from the card to DP with an active powered adapter?
post #5 of 13
Thread Starter 
Quote:
Originally Posted by GoneTomorrow View Post

Have you tried the "Activate All Displays" option in the Nvidia CP?

I searched but did not find that option anyplace. Only Rigorous display detection which does nothing.
post #6 of 13
Quote:
Originally Posted by Topgearfan View Post

Even going from DVI-d from the card to DP with an active powered adapter?
Yes. Your DP -> DL-DVI adapter only works in one direction, for converting DisplayPort signals to a Dual Link DVI signal. It cannot convert a Dual Link DVI signal into a DisplayPort signal.

For that, you need this:

http://ca.startech.com/AV/Converters/Video/DVI-to-DisplayPort-Adapter-with-Audio~DVI2DPA

Unfortunately, that's only single link and isn't enough bandwidth to drive your monitor at full resolution. I couldn't find another cable which does full DL-DVI. Try using the HDMI port? If you're lucky, the Samsung monitor will be a HDMI 1.4a compliant monitor, and will work at full resolution over HDMI.
post #7 of 13
If the monitor is DP and the video card is too the easiest thing to do would be to get another DP cable thumb.gif

edit: also, what others are saying is true
DP-> miniDP worked for your apple monitor because DP and MiniDP use the same signaling and pin count, MiniDP is just a smaller more compact connector.
DP-> DVI only works in one direction because it is an actual signal conversion. DP-> DVI adapters are not programmed to reconvert to DP from DVI, however, if you had 2 PASSIVE adapters it MIGHT work (passive adapters do not convert, they would just use a different wiring scheme, however using two with a DP signal in a DVI cable would probably lead to signal loss, making it still not work), though as i said before, it would just be easier to get a second DP cable if the monitor supports DP
Edited by Nemesis158 - 6/7/13 at 10:10pm
post #8 of 13
Thread Starter 
Quote:
Originally Posted by kevinsbane View Post

Yes. Your DP -> DL-DVI adapter only works in one direction, for converting DisplayPort signals to a Dual Link DVI signal. It cannot convert a Dual Link DVI signal into a DisplayPort signal.

For that, you need this:

http://ca.startech.com/AV/Converters/Video/DVI-to-DisplayPort-Adapter-with-Audio~DVI2DPA

Unfortunately, that's only single link and isn't enough bandwidth to drive your monitor at full resolution. I couldn't find another cable which does full DL-DVI. Try using the HDMI port? If you're lucky, the Samsung monitor will be a HDMI 1.4a compliant monitor, and will work at full resolution over HDMI.

That is a powered adapter correct? I was going to go get one at frys today to try it out. My monitor is only 1920x1080 anyway so this should be fine unless it wont drive it at full 120hz?
post #9 of 13
Thread Starter 
Quote:
Originally Posted by Nemesis158 View Post

If the monitor is DP and the video card is too the easiest thing to do would be to get another DP cable thumb.gif

Ya I know, but the gtx 780 only has one DP port so that is not an option. 1 of my monitors need DP to DP and one then needs DVI to DP.
post #10 of 13
if the monitor is a 1080p monitor then you can use a dvi-hdmi adapter for it. personally i would never buy a monitor with DP and HDMI, but thats just me. (would rather have one with at least DVI or DVI and DP)
Alternatively, you could get one of the dp MST hubs to use DP for both monitors, but i dont know what they are priced at currently
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