Sony 4K TV as Monitor at 120Hz?

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EPrototype

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Oct 21, 2015
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Sorry if I'm not providing enough information, but I'll try my best.

I picked up this TV http://tinyurl.com/q7ry453 to use as... well... a TV as well as a CPU monitor. My graphics card is an Nvidia GTX 980.

Looking at this, you'll see that the TV has 4x HDMI ports and the GFX card has a Dual Link DVI-I, HDMI, and 3 DisplayPorts.

I've been able to connect the new TV to the card via Displayport to HDMI (this one to be exact http://tinyurl.com/obp4snb) using this (http://tinyurl.com/pcn9xhj) HDMI cable. The current and only HDMI port on the GFX card is currently being taken by my second monitor. It's an LG TV that I got a few years ago. I can't find the exact model of that one.

This gives me a display but it is only 60Hz. I'm looking for a way to get 120Hz. I believe I need some sort of Active Adapter as the one I got was a passive adapter.

Is anyone able to help? I'll update immediately if you guys need more info.
 
Solution
M
Like reaper said, 120hz is often cake!
CAKE IS A LIKE!

here is a break down of the cake.

1. 120hz TV lie = (usually labeled as truemotion or some BS) means backlight blinks 120 times per second

2. 120hz TV true = TV input is actually only 60hz, it takes 2 frames and uses an algorithm to extrapolate what a frame would look like between them. so 60 real frames + 60 fake frames per second. WILL NOT ACCEPT 120 FRAMES PER SECOND FROM SOURCE!

3. 120hz CPU Monitor = Only way to get TRUE 120fps

NOTE: HDMI do not have the bandwidth to push out 4k at even 60fps! only the newer HDMI (last I heard it hasn't been finalized yet) can do that! Most content you watch like 4k, 3D, ect... run below 30fps
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Reaper_7799

Reaper_7799

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May 27, 2015
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That's the best you'll do for gaming. It says native 120hz but I don't know if that is even true, sometimes with their marketing of refresh rates are off for 4K tv's or just misrepresented in how gamers look at refresh rates. 60Hz is the max 4K for now, at least it has hdmi 2.0.
 
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E

EPrototype

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Oct 21, 2015
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Are you sure I'm capped at 60hz/4K tvs are capped at 60Hz?

If I go to Contol Panel>Display>Screen Resolution and click advanced settings and go to the Monitor tab, I can check off "hide modes that this monitor cannot display" and 120Hz is there where it's not on any of my other TVs/Monitors that just aren't 120Hz.

I was going on the belief that the ability to get 120Hz was there as regular TV looks absolutely amazing and obviously 120Hz.
 
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MyHD4870x2Melted

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Oct 21, 2015
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Like reaper said, 120hz is often cake!
CAKE IS A LIKE!

here is a break down of the cake.

1. 120hz TV lie = (usually labeled as truemotion or some BS) means backlight blinks 120 times per second

2. 120hz TV true = TV input is actually only 60hz, it takes 2 frames and uses an algorithm to extrapolate what a frame would look like between them. so 60 real frames + 60 fake frames per second. WILL NOT ACCEPT 120 FRAMES PER SECOND FROM SOURCE!

3. 120hz CPU Monitor = Only way to get TRUE 120fps

NOTE: HDMI do not have the bandwidth to push out 4k at even 60fps! only the newer HDMI (last I heard it hasn't been finalized yet) can do that! Most content you watch like 4k, 3D, ect... run below 30fps
 
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reedy777

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May 3, 2012
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I also have a 4K TV they are capped at 60hz on hdmi 2.0 as it does not have the bandwidth to officially support 120hz. you can try cru to overclock it but this is at your own risk you might get ~ 100hz you should also try set the colour depth to 8 bit instead of 10 and change chroma to 4:2:2 technically you,ll be able to hit 120. there are a number of utilities available at blur buster to test your overclock. skipped frames are most likely to occur. say it runs at 90hz but Is skipping frames it will feel jittery u'd be better off backing it down until it's smooth bb has test utility to check for this also
 
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Ahigh

Ahigh

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Hey this has been a while, but finding this question, I wanted to add my two cents. I'm a researcher and I actually have in my lab a display that supports 4K at 120hz. It's the Microsoft Surface Hub 83". It's a $20,000+ display right now. So let me assure you that it can be done. The way that it is done today is by means of four displayport streams over two displayport cables. I would expect future displays that take 4K at 120hz to EVENTUALLY support HDMI, but I have not heard of any upcoming HDMI TV's that enable 4k at 120hz over a standard HDMI cable.

I previously worked for a company that was developing a display that would do 4k at 120hz, and we were going down the same path of using two displayport connections to get it done.

Back in 2007 I started a wikipedia page for some of these things (higher framerates, perceived motion blur, etc) when many more folks were confused by this compared to today's world (of course there's still plenty of confusion!)

https://en.wikipedia.org/wiki/Display_motion_blur

That Wiki page was sort-of taken on by Mark Rejhon, and it evolved into Blur Busters. Mark has done more on this topic than I ever would have, and he is to be commended for his authority on these subjects.

This is another good resource as of recently if you want to use your TV as a computer display:

http://www.rtings.com/tv/reviews/by-usage/pc-monitor/best

I hope this is useful information.
 
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rustigsmed

rustigsmed

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Aug 18, 2014
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sorry people while 95% of the TV market has fake HZ (remember all those 240hz tvs?). Some sony 4k tvs DO support 120hz native but the resolution is only at 1080p. for example the sony x85c. they definitely do not support 4k 120hz.
You will need to check rtings.com to see if the model does or not. do not believe marketing but review sites such as rtings that actually test the TVs.
 
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