[rosmoke]

Post a picture with the cable, how much you paid and from where you got it, in my case the problem was the cable.
I would recommend you to buy a hdmi cable with a textile shielding, many advertise 1.4 hdmi cables as 2.0.

[rosmoke]

kphs, I have it running on a late 2013 MBP Retina 15″ and a mid 2015 MBP Retina 15″, if you are sure that you tv has a hdmi port capable of 4k@60hz and you also used switchresx with the settings from above, you should change your hdmi cable till you get one capable of 4k@60hz, I had tried with 3 cables before I finally got one capable. Choose one thick and with a textile protective coating. Hope this helps.

[rosmoke]

You haven’t said if your MacBook is 13″ or 15″, be aware that the 13″ one is not capable of outputting 4k@60hz, my wife has the 13″ Mid 2014 and it doesn’t work.

[rosmoke]

Can you upload a picture with your hdmi cable or give me a link from where you got it? I had to change like 4 cables till I’ve found one which was actually capable of 2.0, 18gbps.

[rosmoke]

I would recommend you to try with a pc that has a different gpu.
Have you tried to create a custom resolution using CVT-RB ?

[rosmoke]

After you select Intel try and press the Enter keypad. It should work

[rosmoke]

 

With the help of Club 3d I managed to make it work eventually !!!!

My problem was that switchresx has a bug and stops saving resolutions and I was trying with the ones which were already in switchresx (4k@60hz) BUT they didn’t had CVT-RB on.

I created a new user in OSX and switchresx started to save my custom resolutions.

Now it works with ultra hd on, when ultra hd is off, colours are pink.

My solution was to make sure I use a proper cable (I have tried with 3 cables and it didn’t work, they were all advertised as 2.0 but they weren’t), and make sure you make a custom resolution 4k@60hz with CVT-RB on.

This is a picture with my settings.
Good luck lads !

[img]http://insights.club-3d.com/wp-content/uploads/2016/05/Screen-Shot-2016-05-02-at-14.45.39.png[/img]

 

[rosmoke]

I’ve just sent an email now even though I think it would be more useful for everybody we could figure it out in this forum. I’m sure more people will benefit from this.

This is my email:

Hi,

I’m trying to get 4k@60hz on my LG UF770V, I’m using a CAC-1170 adaptor (mini dp 1.2 to hdmi 2.0), hdmi cable 18gbps 2.0 (have tried 4 of them), the last hdmi cable actually allows me select 4k@60hz without the need of adding a custom resolution in switchresx.

On the back of my tv it’s written 4k@60hz, in the menu I enabled and disabled Lg Ultra Hd Deep Color, port 1 supports 4k@60hz (4:4:4, 4:2:2, 4:2:0).

When I select 3840 x 2160, 60 Hz (NTSC) HiDPI or the one without HiDPI the TV works ok, but shows 30hz, even in tv menu it shows 4k@30hz.

In http://www.testufo.com I get 60hz, in About This Mac / System Report… / Graphics/Displays / it shows the resolution : 3840 x 2160 @ 60 Hz.

I have also updated the firmware for this adaptor with ps176b0_0x07.0x00.0x23_encryt_bank12.hex (you have no idea how hard it was to find a computer with a dedicated gpu, windows, mini dp port).

I have tried it on 3 macbooks (Late 2013 rMBP 15”, Mid 2014 rMBP 13”, Mid 2015 rMBP 15″), two tv’s (LG UF770V (my tv), LG UF850V (friend’s tv)).

The third cable which I have bought is : http://www.ebay.ie/itm/391324200976?_trksid=p2057872.m2749.l2649&var=660570922231&ssPageName=STRK%3AMEBIDX%3AIT

This is the last hdmi cable which I have bought http://www.adverts.ie/cables/gold-plated-2m-high-speed-hdmi-2-0-cable-full-hd-1080p-2160p-4k-2k-3d-for-ps3-lcd-dvd-hdtv/9152841?notification=75e0c281cb8392a6bd3d3f18ec045ac1-1462058125#comment_68183533

<p class=”p1″>Basically I can choose 4k@60hz but in fact the tv displays 4k@30hz, even though the laptop informs me that the tv displays 4k@60hz.

What else can I do ?

Thanks,

Daniel Asofiei.
[img]http://insights.club-3d.com/wp-content/uploads/2016/05/about.png[/img]

[rosmoke]

My setup consists of :

rMBP 15″ late 2013, rMBP 13″ mid 2014, rMBP 15 mid 2015
Tv LG UF770V (capable of 4k@60hz and 4:4:4)

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NickZimmerman, did you had any luck ? I’m having the same issues …

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Eduardo, I have the LG UF770V 55″ what tv do you have? Also what pc do you have?

I have the same adaptor, macbook pro 15″ late 2013, I have tried with a macbook mid 2015 brand new, it still doesn’t work. …

[rosmoke]

How can you do that ? As far as I know that was only possible on old versions of OSX, on el capitan or yosemite there is no option, isn’t it ?

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