So I was wondering what would be better for the system I am planning to build 8GB 1866 MHz or 16GB 1600 MHz RAM. In the past I never really cared about this before I just used to throw in something and prey it would work but I would like to know because I was looking at buying some Corsair Dominator Platinum 8GB at 1866 MHz but then for the same price (near enough) I can buy 16GB of 1600 MHz of Corsair Vengeance RAM so all I can really say is... Help please o.o .