120Hz monitor, options only let me select up to 75Hz

[Goatman]

i have a new 4k tv/monitor. its a 120hz. i have windows 10. i also have gtx 780. is there a program? or what do i have to do to get my ish to run at 120hz thanks

ive read online that 4k only goes to 30hz, but im at 4k right now at 60hz.

also read that a display port (an adapter similar to hdmi) lets 120hz gameplay. anyone? please?

[_I_]

4k only supports 60hz input (just like alot of 120hz 1080p tvs)
it uses image processing to create the fake 60fps to fill in for the 120hz, which means the image is delayed by atleast 3 frames, most do by 90-150+ms

if you are using hdmi, look up its specs, the gtx 980 supports hdmi 2.0, if the tv only supposrts 1.4, it will run at single link speeds, enough for 4k30hz
(hdmi 1.4 will work with 2.0 devices at 2.0 spec)
https://en.wikipedia.org/wiki/HDMI#Version_comparison

use a dp cable if you can

[Azza ☠]

You would need DisplayPort 1.3 or better to have enough bandwidth to support UltraHD 4k @ 120Hz.

DVI-D Duel-Link would allow 120/144Hz @ 1440p resolution.

HDMI won't cut it - 120Hz @ 1080p perhaps, depending on version.

---

As for 4K limited to 30Hz, it depends on what monitor you have and how it works, there's some which are split processing, half the monitor at 30Hz and the other half at 30Hz, then stitching it together claiming 60Hz in total. Avoid a 4K monitor like this, if possible. Only plus to them, is in SLI each graphic card can work on either side at the same time. However, gaming is console performance (still way better looking).

[initiaLiSeD]

You need to hook up the display using Displayport to fully support your screen, HDMI is not fast enough.

[rotNdude]

Post the make and model of TV.

[Goatman]

so my 4k 60hz setting is a lie? its acually 30 hz even though it says 60hz?

my tv is ju640d 40 inch http://www.samsung.com/us/video/tvs/UN40JU640DFXZA

[rotNdude]

That TV only has a HDMI port from what I can get from the manual.

[initiaLiSeD]

http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-780/specifications

3840x2160 at 30Hz or 4096x2160 at 24Hz supported over HDMI. 4096x2160 (including 3840x2160) at 60Hz supported over Displayport.

GTX 780 supports HDMI 1.4 officially and has a driver workaround (340 and later) that allows it to run 4k@60Hz by drastically reducing the colourspace and not all screens will support this properly. Normally HMDI 2.0 is needed for 4k@60Hz or Displayport 1.2 would be required to support it fully 4k@120Hz.

What you have is a case of old tech wont do the new thing.

The GTX 780 is the limiting factor as your TV doesn't have DP 1.2 and the card doesn't have HDMI 2.0 you may be able to solve it with a Displayport 1.2 to HDMI 2.0 adapter assuming your GTX 780 has a Displayport...

http://www.anandtech.com/show/9867/club3d-releases-dp12-to-hdmi-20-adapter

[Goatman]

my graphics card does have a display port. also my tv only had hdmi port. im assuming a displayport is.... displayport to hdmi so my gpu (displayport) plugs into tv(hdmi) but as i said in my windows options it clearly says 60hz at both 4k resolutions. but eather way, will the displayport give me 120hz? at any resolution

[Azza ☠]

It's not the GTX 780 issue, it's the 4K monitor not supporting it.

Honestly, if I was you... return the monitor, claim it doesn't work with your graphics card (due to the different connections - DisplayPort vs HDMI). It sounds like one of those dreaded 30Hz/30Hz = 60Hz ones to be frank.

Then if you can afford it, get the Acer Predator XB271HU instead!

You will seriously up the hardcore gaming and not look back at 4K, no regret.

The GTX 780 sweet spot is 1440p resolution.

Acer Predator XB271HU delivers 1440p, IPS panel (rich/sharp colours), at 165Hz with G-SYNC and a blazing fast response time. For gaming purposes, that's more drool than that 4K monitor could deliver.

That is, unless you want TV I guess... and happy with pretty but console monitor performance for PC.

[Goatman]

your telling me a displayport wont work, but u said it would work. listen man, i dont go tthe money to go buy more stuff. my gpu has a displayport plug in, the tv does not. does the tv and gpu need a display port?
when peole say displayports work, do they acually mean displayport double sided.
i thought displayport had 1 side DP and the other side HDMI

[_I_]

for dp to work both need to have it
if the tv does not have a dp input, return it and get a 1440p monitor not a tv

the gtx780 will be alot better with the lower res, and a monitor will have 0 display lag

[Azza ☠]

Goatman původně napsal:

your telling me a displayport wont work, but u said it would work. listen man, i dont go tthe money to go buy more stuff. my gpu has a displayport plug in, the tv does not. does the tv and gpu need a display port?
when peole say displayports work, do they acually mean displayport double sided.
i thought displayport had 1 side DP and the other side HDMI

I don't know how much the 4K monitor costed... nor if you need it for TV or not.

What I was suggesting is a replacement/swap of it, if desired and similar priced.

Also, Yes - both the Monitor and Graphics card needs DisplayPort to run the cable between them. You can still live with HDMI, I was just giving you an excuse to change it, if you aren't satified by that.

If you are keeping it - get HDMI 2.0 or 2.0a, which can support 4K @ 60Hz | 2.0a also supports HDR (High dynamic range imaging).

To fully support 4K at a good performance, you would want SLI (2 graphics card). Even if the graphics card is high-end and sweet performance like the GTX 780, 970, 980, or 980Ti. It's not until Nvidia Pascal graphic cards arrive it would run smoothly in games upon a single card without possible issues.

[Goatman]

well seeing as im allready at 4k 60hz my monitor has hdmi 2.0, or my computer whatever one uses it. what about monitor overclocking via nvidia control panel?

[Andrius227]

Goatman původně napsal:

well seeing as im allready at 4k 60hz my monitor has hdmi 2.0, or my computer whatever one uses it. what about monitor overclocking via nvidia control panel?

From my experience monitor overclocking only gives ~2-4 extra hz. But thats with normal pc monitors, not tv's like yours. Your tv could maybe get a similar overclock, but it's not worth messing with. You would not see a difference and it could potentialy damage the tv.

[ManiAC]

Dont use hdmi