4K and higher speed DDR4

[Ayahuasca]

Am I making this up or did I read that higher speed memory helps at higher resolutions or was it the other way round and helps more at lower resolutions.

Using 2400mhz with a 5820k and wondering if it's worth going 3000mhz+

 

[Ayahuasca]

Thanks, will using 3200mhz C14 affect my 5820k overclock at 4.7ghz? Is 1T timing still usable on C14 3200mhz?