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Will DVI-I Dual Link to HDMI do 120hz?

post #1 of 9
Thread Starter 
Basically if I use a DVI-I Dual Link to HDMI cable can I get 120hz? Or will it still be bottle necked by the HDMI input even though the signal itself is 120hz? Monitor is a sa750d 120hz capable.

Setup would be
Card DVI-I -> DVI-I to HDMI cable -> HDMI monitor

EDIT** I just realized that I said DVI-D. I meant dual link, It has been corrected above and in the Title. LOL
Edited by dekciW - 10/15/15 at 11:32pm
     
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post #2 of 9
I highly doubt the monitor is using HDMI 2.0 so i won't be able to give you 120hz. Why not use the display port connection on that monitor? that should work.
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post #3 of 9
Thread Starter 
I'm already using it for for 1 of my 3. Trying to get the other 2 on 120 hz. There never seems to be enough DP connections on these cards....
     
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post #4 of 9
Thread Starter 
So after some research I've read that HDMI 1.4a is capable of the bandwidth necessary, as long as you have an HDMI cable that can do the bandwidth, and both source and input are at least 1.4. I've also come across this True 120Hz from PC to TV. All the other info I find seems to be about HDMI to DVI not DVI to HDMI. I'm going to go pick up a cable to tonight and try it out I guess.
     
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post #5 of 9
Quote:
Originally Posted by dekciW View Post

Basically if I use a DVI-D to HDMI cable can I get 120hz? Or will it still be bottle necked by the HDMI input even though the signal itself is 120hz? Monitor is a sa750d 120hz capable.

Setup would be
Card DVI-D -> DVI-D to HDMI cable -> HDMI monitor

You "can" with a custom resolution, however it will be basically unusable.
You will get 120hz refresh rate, yes, and an actual image on the monitor, but the image will be distorted and stretched out and most likely you will get an "Incorrect Cable: please insert the DVI cable that came with the monitor." If you get an image at all, only about 60% of the screen will be visible.

I know this because I use a DVI to HDMI cable to use my laptop (which only has HDMI and VGA ports) to unlock Lightboost on my Benq monitor, by manually creating and forcing a 1920x1080@120hz refresh rate. I actually think it was 100hz I forced, not 120hz, I forgot...100hz was easier to force. It's funny because I get the incorrect cable error message, yet the monitor is in 3D lightboost mode with the stretched out image, since it's being used through the DVI port on the screen to HDMI on the laptop.

The same thing works (and happens) on my Asus VG248QE. DVI to HDMI 1920x1080@100 (or 120hz)-->incorrect cable error->lightboost is activated with an incorrect signal.
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post #6 of 9
Thread Starter 
But see your setup is going backwards of what I'd be doing. If I understand you your using HDMI as the source. I will use DVI as my source.


EDIT** I just realized that I said DVI-D. I meant DVI-I Dual Link. LOL
Edited by dekciW - 10/15/15 at 11:31pm
     
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post #7 of 9
Just tried it (just stuck the hdmi to dvi connector on the -other- end to use the monitor as the HDMI output (hdmi plug on the monitor) and the video card as the DVI source (DVI plug).
Doesn't work.

The custom resolution doesn't even appear without the toastyX clock patcher, but if you use the patcher, the 100 and 120hz refresh rates appear (if you create them) but attempting to switch to them makes the monitor turn blue with a "NO HDMI SIGNAL DETECTED".

So, nope, doesn't work frown.gif
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post #8 of 9
Thread Starter 
Is your cable a single link dvi or a dual link?
     
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post #9 of 9
Dual of course.
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