798 iPhone_iPad_Mac_apple

2 x 4K Monitors

Hey Everyone,

I hope someone can help me out with this as I am going crazy. Here is the situation.

I have a MacPro (Late 2013) with Dual AMD Firepro D700

I have two monitors:

o LG 27UD58-B which supports up to 3840 x 2160 - 60HZ

o LG 31MU97 which supports up to 4096x2160 - 60HZ

They are connected as below:

o LG 31MU97 is connected using MiniDP to MiniDP cable. MacPro Thunderbolt Port 1 (Bus 1) ---> Monitor MiniDP port.

o LG 27UD58-B is connected using MiniDP to DP cable. MacPro Thunderbolt Port 2 (Bus 2) ---> Monitor DP port.

Here are my issues:

I cannot get LG 27UD58-B to use 60hz refresh rate. Furthermore, I cannot fine tune the resolution either unlike LG 31MU97.

Display Settings for LG 31MU97

Display Settings for LG 27UD58-B

System Info

最後更新：2017-10-06 23:34:56