Which ram for gaming pc?

jmracerboy

Honorable
Feb 20, 2014
167
0
10,710
Which is better?
8GB 1600mhz cas 9 - £60
8GB 2133mhz cas 11 - £60
8GB 1600mhz cas 8 - £62
8GB 1866mhz cas 9 - £63

Specs:

i5-4690K
Gigabyte Gaming GT
R9 290 crossfire