fokkerlit Posted August 6, 2015 Share Posted August 6, 2015 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 2 Link to comment Share on other sites More sharing options...
smolderas Posted August 9, 2015 Share Posted August 9, 2015 Does it work without nvidia drivers? And what is your machine id? Link to comment Share on other sites More sharing options...
fokkerlit Posted August 10, 2015 Author Share Posted August 10, 2015 I haven't tried it without nvidia drivers yet, I will when I get the chance. I'm using iMac14,2 Link to comment Share on other sites More sharing options...
smolderas Posted August 10, 2015 Share Posted August 10, 2015 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... Link to comment Share on other sites More sharing options...
drlove Posted August 12, 2015 Share Posted August 12, 2015 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 :-) Link to comment Share on other sites More sharing options...
oZen Posted March 4, 2016 Share Posted March 4, 2016 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)? Link to comment Share on other sites More sharing options...
aphex6b Posted March 12, 2016 Share Posted March 12, 2016 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. Link to comment Share on other sites More sharing options...
oZen Posted March 13, 2016 Share Posted March 13, 2016 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 Link to comment Share on other sites More sharing options...
bbeepp Posted March 17, 2016 Share Posted March 17, 2016 Isnt't adding nv_spanmodepolicy=1 at boot arguments enough to fix nvidia 4k issue? Link to comment Share on other sites More sharing options...
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