AMD’s new Ryzen 9000 processors are here, but these AMD5 CPUs aren’t compatible with last-gen DDR4 memory. That means that if you’re building or upgrading a PC and have chosen the Ryzen 9 9900X for your CPU, it might be time for a RAM upgrade. We don’t want you to settle for something sub-par with a chip like this. Below, we’ve rounded up the best RAM for the Ryzen 9 9900X to help you get the most out of AMD’s snappy new “Zen 5” hardware.