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Can HDMI do 120hz? - Page 2

post #11 of 30
Quote:
Originally Posted by stargate125645 View Post

People seem to make a big stink about having a "true" 120Hz display. You're suggesting that those displays only work at 120Hz if they use HDMI 1.4b, D-DVI, or DisplayPort, correct?

Any 120hz TV out today can not accept a 120hz signal, period. That's why they aren't "true" 120hz.

I don't think there is any display, PC or TV, that can take 120hz over HDM., Although the latest HDMI spec *should* support it over 1080p.
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post #12 of 30
So why do a lot of people suggest otherwise, searching for a true 120Hz monitor.

Edit: OK, I presume you mean specifically a TV (i.e. With a tuner and image processing), and resign to there being a true 120Hz monitor. It's just that HDMI 1.4a and below cannot be used with it.
Edited by stargate125645 - 11/3/12 at 12:36am
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post #13 of 30
Quote:
Originally Posted by Crazy9000 View Post

Any 120hz TV out today can not accept a 120hz signal, period. That's why they aren't "true" 120hz.
I don't think there is any display, PC or TV, that can take 120hz over HDM., Although the latest HDMI spec *should* support it over 1080p.
How hard is it for these companies to put a damn DVI-D dual link input on these new TVs. Sorry thats been making me angry for years.
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post #14 of 30
Thread Starter 
So since my GTX 680 only supports 1.4a, i won't be able to get 120hz 1080p over HMDI. Correct?
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post #15 of 30
Yes. Display port or DVI-D is not an option?
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post #16 of 30
Quote:
Originally Posted by HJP View Post

So since my GTX 680 only supports 1.4a, i won't be able to get 120hz 1080p over HMDI. Correct?

The monitor is the problem, not your video card. I do not think there is a monitor created that will accept 120hz over HDMI. Your video card would probably do it if someone made a monitor that could.
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post #17 of 30
Thread Starter 
Quote:
Originally Posted by stargate125645 View Post

Yes. Display port or DVI-D is not an option?
The monitor im planning on buying is the Samsung S27A750D. It has HDMI and Display port.
The thing is, i'm hearing that some people are having problems with the display port, so i was making sure if there's another option.
Quote:
Originally Posted by Crazy9000 View Post

The monitor is the problem, not your video card. I do not think there is a monitor created that will accept 120hz over HDMI. Your video card would probably do it if someone made a monitor that could.
I see... Thank you! smile.gif
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post #18 of 30
There is a single reason why HDMI 1.4a cannot process a 120 Hz 1080P signal. The specification and cable can handle it. It is that all HDMI pixel clock chips produced have been under the frequency requirement to handle that bandwidth. New HDMI pixel clock chips are coming out in 2013 that will run at 330 MHz and be able to run 1080P @ 120 Hz. The main drive behind that is to get true 120 Hz 1080P projectors for true 60 Hz/Eye 3D. I'd imagine the proper (faster) HDMI chips would find their way into any decent display.
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post #19 of 30
Quote:
Originally Posted by CallsignVega View Post

There is a single reason why HDMI 1.4a cannot process a 120 Hz 1080P signal. The specification and cable can handle it. It is that all HDMI pixel clock chips produced have been under the frequency requirement to handle that bandwidth. New HDMI pixel clock chips are coming out in 2013 that will run at 330 MHz and be able to run 1080P @ 120 Hz. The main drive behind that is to get true 120 Hz 1080P projectors for true 60 Hz/Eye 3D. I'd imagine the proper (faster) HDMI chips would find their way into any decent display.
That's interesting, the 1.3 spec is a max 340MHz pixel clock - So nothing has ever fully supported 1.3 even, let alone 1.4? (except graphics cards I guess?)
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post #20 of 30
Quote:
Originally Posted by CallsignVega View Post

There is a single reason why HDMI 1.4a cannot process a 120 Hz 1080P signal. The specification and cable can handle it. It is that all HDMI pixel clock chips produced have been under the frequency requirement to handle that bandwidth. New HDMI pixel clock chips are coming out in 2013 that will run at 330 MHz and be able to run 1080P @ 120 Hz. The main drive behind that is to get true 120 Hz 1080P projectors for true 60 Hz/Eye 3D. I'd imagine the proper (faster) HDMI chips would find their way into any decent display.
Now you've got me hooked. Any details, sources or other additional info like roadmaps or timeframes?
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