ddr4-2133mhz

Hi! So I have 1x8gb of HyperX Fury DDR4 2133mhz ram in my PC. Single channel ram is very low so I thought of buying another 1x8gb stick. To my surprise, there is no HyperX DDR4 2133mhz being sold new in my country anymore. Basically all I have left to do is mix ram brands. I thought of buying an...