After about four weeks I got a reply from LG support with a firmware file attached.
Here is some information about the file:
Filesize: 304347 bytes
It's an encrypted ZIP file that can be opened with LG Screen Manager. With that file, I've ...
There's not really any significant amount of extra main memory usage for buffers due to having dual 4k-displays.
Indirectly the total main memory usage might increase because some will tend to run more programs at the same time, have more windows and documents open at the same time, etc. - and that will lead to higher main memory usage.
It is correct that ...
For MacBooks (including Pro), if the requested voltage based on current system load is higher than the power available, it will try to make up for the difference by drawing from the battery; if the requested voltage is lower than the available power, it will use the extra power to recharge the battery until it is full.
For using the 85W charger on an 87W ...
No, the mid-2015 15" Retina MacBook Pro is not powerful enough to drive a 5k-display.
You can see the specifications here:
Mid-2015 Retina MacBook Pro Technical Specifications
You're limited to driving up to a 3840x2160 pixels external display via the Thunderbolt/mini-DisplayPort port while using the built-in display.
For the HDMI video output you can ...
Per the technical specifications, your MacBook will support a maximum resolution of 3840x2160 which is technically UHD 4K (16:9)
Can you connect a 5K display?
Yes, but it will show at the 4K resolution if you use one Thunderbolt cable. If you use two, you can drive a 5K and the display must support MST (Multi Stream Transport). In this scenario, only one ...
The retina display causes any somewhat graphic intensive apps to be laggy. It's a major design flaw. You can fix this by right clicking on any app and clicking "get info". Then click on "open in low resolution".
You'll be surprised to see how fast apps run now. It will look not as clear, however. The retina sucks. My 2011 macbook ran everything better ...
So now I have the 2017 MacBook Pro 15" with AMD Radeon RP560. It works with 2 External 4K Displays. It is really slow with the internal Intel Graphics Chipset. But you can deactivate automatic Graphics switching in System Settings -> Energy Saving. Then it is really usable.
I tried first with two Belkin Adapters (http://www.belkin.com/de/p/P-F2CU038/) for ...