@agriffis MST support for the Dell UP2424Q is only required if you want to use the monitor's daisy chaining function.
DP 1.2 has enough bandwidth, but the decoder chips (more specifically, the TCON) that are currently on the market are not clocked high enough. So 4K@60Hz monitors need to have an internal DP MST hub still; the monitor uses only one cable, but will be seen as two separate displays by the GPU. This will change once those chips reach the market.
Originally Posted by 89c51