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4k@60Hz 4:4:4 working, Nvidia GTX 970, Samsung UN40JU6500F

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Plugged HDMI cable into video card and HDMI 1 on TV.


Set Source type to "PC", went into settings and turned on UHD color for HDMI 1.


Installed web drivers.


Reboot, used "nvda_drv=1"


Installed SwitchResX.


Downloaded https://github.com/floris497/mac-pixel-clock-patch/


Ran the patch and rebooted.


Opened SwitchResX and selected "3840x2160, 60Hz (NTSC)"


 


Prior to applying the patch only resolutions with a pixel clock of 297 Mhz and less were available, now resolutions with a pixel clock up to 594 MHz are available (4k@60Hz).


 


System:


 


OSX Yosemite 10.10.4


Nvidia Web Drivers 346.02.02f03


SwitchResX 4.5.1


 


Samsung UN40JU6500F


GearIT High-Speed 2.0 HDMI Cable


EVGA GeForce GTX 970 FTW+ ACX 2.0 4GB


Crucial Ballistix Sport XT 32GB Kit


Samsung Electronics 840 Pro


ASUS Micro ATX DDR3 2600 LGA 1150 Motherboards GRYPHON Z97


Intel Core i7-4790K


IOGEAR Bluetooth 4.0 USB Micro Adapter


post-1388340-0-71810100-1438894180_thumb.png

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I haven't tried it without nvidia drivers yet, I will when I get the chance.

 

I'm using iMac14,2

Mine's iMac14,2 too, but without nvidia drivers without luck. Please try it without them...

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Hi, 

 

I can confirm this method to be working! 

 

THANKS

 

Regards, 

 

Marius

 

10.10.4

SMBIOS MacPro3,1

GTX980ti 

WebDriver-346.02.02f03

Philips BDM4065 4K monitor @ 60Hz @ Display Port :-)

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Hi guys!

 

My graphic card is an 'old' gtx770 with a DisplayPort connector.

Even though, do you thing it can work for my rig (4k@60hz)?

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Only 970 series up have HDMI 2.0 output support DP 1.2 (on almost all cards out nowdays) can do 4k60 also, no need for any patch, the trick is mac os needs special kind of hacks to get normal hw work fine, such as AppleAzalia Framebuffer failing to to 4k oob HDMi 2.0 failing oob etc.

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Only 970 series up have HDMI 2.0 output support DP 1.2 (on almost all cards out nowdays) can do 4k60 also, no need for any patch, the trick is mac os needs special kind of hacks to get normal hw work fine, such as AppleAzalia Framebuffer failing to to 4k oob HDMi 2.0 failing oob etc.

 

 

Thanks for your answer.

However my MSI gtx 770 has a 1.2 version of DP port, so it should be OOB (through DP), ins't it ?

Plus the 770 is on that Nvidia list for 4k support regardless the port you use:

http://www.geforce.com/hardware/technology/4k/supported-gpus

 

Thanks in advance ;)

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