Reddit mentions of DisplayPort to HDMI Active Adapter with HDR Support Displays up to 4k at 60Hz with HDR High Dynamic Range - Connect PC or Tablet with DisplayPort to HDMI Enabled Monitor, TV or Projector

Something like that seems to do the trick : https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS

The hdmi port on your computer is likely 1.4. If you have a display port, use that with a display port to hdmi 2.0 adapter.

I had the same issue. My 380x has 1 4 hdmi. Which can only do 4k @ 30 hz. But the display port can do 4k @ 60 hz.

So to make it work i got:

Cable

And

Adapter

Edit: also make sure the tv is set to allow 4k@60 on its ports. My X800D sony has an option called "enhanced mode", that i have to set for 60 hz at 4K on the hdmi ports.

I'm thinking the adapter is faulty. Try contacting the seller. About 10% of reviews complain that it's stuck on 30hz. 10% failure rate on electronics is fairly common.

Hey, I have that exact gpu and I use this for my 4k display, and it works great. You have a kickass gpu should you want to explore keeping it!

What about these things?

https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/ref=sr_1_3?ie=UTF8&qid=1478729829&sr=8-3&keywords=displayport+hdmi+2.0

eg: https://www.amazon.com/UPTab-DisplayPort-Adapter-displays-4096x2160/dp/B01B6ZOMIS

Both of those will support 4K at 30Hz.

I forgot, but you could use this one:

https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/ref=sr_1_2?s=electronics&ie=UTF8&qid=1495739033&sr=1-2&keywords=displayport+to+hdmi+2.0

So an adapter like this:

https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS

Isn't needed?

I've tried this one and it didn't do 4K@60hz at all. It got to close to 2048x1536 and then it would crap out. If I was lucky it would do 2560 x 1600.

I think some of those "4K" adapters can barely call themselves 4K (both of the above listed resolutions are "4k x 2k" according to my graphics card)

I used this cable and it worked just fine. You may not need as long of a cable. I was trying to extend the range of my vive from the bedroom to the next room so I went for 15' extensions where possible.

I was in your shoes but opted for a mini displayport to displayport cable instead. The Vive's link box has a mini displayport on it.

4k 30hz isn't enough for the pro? It's not even 4k though. Found a different option, 17 bucks, 60hz: https://www.amazon.com/gp/aw/d/B01B6ZOMIS/ref=mp_s_a_1_1?ie=UTF8&qid=1520961858&sr=8-1&pi=AC_SX236_SY340_QL65&keywords=uptab+displayport+1.2&dpPl=1&dpID=41stBHKMYSL&ref=plSrch

As I posted above, this one supports 4k 60hz 4:4:4 - https://www.amazon.com/gp/aw/d/B01B6ZOMIS/ref=yo_ii_img?ie=UTF8&psc=1

When I had a problem like this the problem was that my hdmi cable wasn't an hdmi 2.0 cable. It would work via the hdmi 1.2 port, but hooked it up to the hdmi 2.0 port and no picture.

I bought an hdmi 2.0 cable and the problem went away.

Another factor is sometimes that you need an "active" displayport adapter. This is the specific one that worked for me:
https://www.amazon.com/gp/product/B01B6ZOMIS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

After some quick googling, I take it that something like this won't work: https://www.walmart.com/ip/Monoprice-DisplayPort-1.2a-to-4K-HDMI-Active-Adapter-Black/48605165, or this: https://www.amazon.com/gp/product/B01B6ZOMIS. Or will it? I'm asking this due to the fact that these, amongst others on Google's shopping site, are listed as active adapters...

I'm confused. Because the HDMI port isn't being used. The display port adaptor would just turn it into HDMI 2.0 so it would just be pulling from the display port which has the ability to do 4K 60Hz.

https://www.amazon.com/gp/aw/d/B01B6ZOMIS/

The refresh rate not the frame rate.


https://www.amazon.com/gp/product/B01B6ZOMIS/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

If you ever want 60hz at higher resolutions, pick one of those up.

Does your card have a display port out? If so, get one of these:

https://www.amazon.com/gp/product/B01B6ZOMIS/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

I did, and hooked it up from the display port out on the card to the hdmi port on the TV and now I can get either get full on 4K @ 60fps and HDR, or 1080p @ 120 fps from my PC because the adapter Is hdcp 2.2 compliant.

That left the HDMI out on my GTX 1080 to use with my Rift.

You specifically need this:
> ACTIVE displayport to hdmi adapter

This is the one I have (UPTab DisplayPort 1.2 to HDMI 2.0a Active Adapter 4K@60Hz) -
https://www.amazon.com/gp/product/B01B6ZOMIS/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

A passive adapter will work with 2 monitors, but to work with 3 you need an active adapter.

I can't tell you 100% for sure if it will work on your machine, but this is what got things working with 3 monitors at work.

Thoughts on this guy?:

https://www.amazon.com/UPTab-DisplayPort-HDMI-Active-Adapter/dp/B01B6ZOMIS

1. You're right on point 1; forgot that Netflix actually requires a 7th gen Intel CPU for 4k playback because they fear piracy, as well as wanting to utilize the newest of decoders...
   
2. This I can't actually find a source for, for the colour resolution? I did find a few sources for the HDMI 2.0 thing on the 900 series cards. Also, this DP to HDMI should work to display the 4k60 on the 700 series. https://www.amazon.com/UPTab-DisplayPort-Adapter-displays-4096x2160/dp/B01B6ZOMIS

Have you tried on all 3 HDMI ports on your TV?
Have you tried with a different HDMI cable?

Also you could try using an display port to HDMI Active Adapter
https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/ref=sr_1_8?ie=UTF8&qid=1480569906&sr=8-8&keywords=displayport+to+hdmi+4k

https://www.amazon.com/UPTab-DisplayPort-Adapter-displays-4096x2160/dp/B01B6ZOMIS/ref=sr_1_3?keywords=hdmi+to+displayport+uptab&qid=1556683398&s=gateway&sr=8-3

I've used an UPTAB 4K adapter for over 3 years. (not the exact same look as one shown)

It works very well with 4K gaming over HDMI connection to my 4K TV

Before you go that route I have more questions. What videocard are you using becauses not all vcard outs support 60hz. My 1080sc didn't to my tcl 43" but DID work with a DisplayPort to HDMI adapter and then to a 10 foot hdmi. I helped another guy on here recently with the same issue. It's not always about length. Video cards are garbage for supporting 4k/60hz over hdmi but WILL over display port to hdmi. Cheaper route to try first. HERE And being that the ones they listed are for 1080p THIS is for 4k 60hz but I would still use the dp to hdmi in unison because 60hz from hdmi on videocard typically doesn't work by itself.

Ok So looking at what you have for a tv, The TV dose not have a displayport connection, and it very likely your 390x dose not have a hdmi 2.0 connection. You may need a converter that will convert a Displayport 1.2 to a hdmi 2.0 signal.

something like this, https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS

this is the cheapest one that check all boxes except freesync is only over displayport. so you might need this https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS

http://www.lg.com/us/monitors/lg-32UD99-W-4k-uhd-led-monitor

An HDMI cable is an HDMI cable is an HDMI cable, but connecting it in this way is dependent on the HDMI version the dual mode displayport is outputting. But to my knowledge dual mode DP is limited to HDMI 1.4 which wont get OP his 60fps.

This guy may work. https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/

This is going from DP on the videocard to HDMI on the display, correct OP?

Oculus apparently works fine on DisplayPort to HDMI 1.4+ converters, you'll need an active one. https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/ref=sr_1_1?ie=UTF8&qid=1486359040&sr=8-1&keywords=hdmi+2.0+displayport+active+-mini

Use a displayport to HDMI converter.
Something like this: https://www.amazon.com/UPTab-DisplayPort-HDMI-Active-Adapter/dp/B01B6ZOMIS

the solution is displayport,Mobo in build above has it.

If your TV does not have a displayport you can use an active dp to hdmi 2.0a adapter like this one https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS or this one https://www.amazon.com/Club3D-Displayport-1-2-HDMI-CAC-1070/dp/B017BQ8I54/ref=pd_sim_147_1?ie=UTF8&pd_rd_i=B017BQ8I54&pd_rd_r=SZSDX49Q4SBKBF0QJYZ5&pd_rd_w=uMnWY&pd_rd_wg=9rDBd&psc=1&refRID=SZSDX49Q4SBKBF0QJYZ5 and then an hdmi 2.0 cable

Yes I'm not home yet but can get when I am and I was thinking maybe something like this and put it into the pc hdmi 2.0 slot

https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS

also I'm confused to because when I was playing doom 4 it was ruining on 120 fps on the 4k TV with bad frame drops but it seemed like it was some what there.

DisplayPort 1.2 to HDMI 2.0a Active Adapter 4K@60Hz https://www.amazon.com/dp/B01B6ZOMIS/ref=cm_sw_r_cp_api_gXRFyb386V4FM

States in description Supports content protection formats HDCP 1.4 and HDCP 2.2

So something like this?

https://www.amazon.com/DisplayPort-HDMI-2-0a-Active-Adapter/dp/B01B6ZOMIS/ref=sr_1_1?s=electronics&ie=UTF8&qid=1483407841&sr=1-1-spons&keywords=DisplayPort+1.2+to+HDMI+2.0a&psc=1

I see what you mean, almost everything I found at first only noted up to 1080p. Your TV isn't capable of anything fancy like multiple cables for a single input. Basically, anything supporting hdmi 2.0 should be able to handle 4k 60hz. I can't say I'm familiar with the brand, but at a glance, this seems like a good fit for your situation. If you want to keep looking, just do a search for display port to hdmi 2.0. Be sure and actually look at the specs though, a lot of similar stuff on Amazon that comes up with that search only lists 4k at 24hz.

So I bought this
But as in my reply to /u/letscountrox : Problem I see is that most want to go from displayport as a source to HMDI 2.0. No idea if the inverse works.