3000mhz ram

So, my ram advertises 3000mhz, do they have to run at 3000mhz individually? Is that i wanted to put my ram to atleast 2933mhz. The problem, is that, even putting them at 2400mhz my pc keeps rebooting with no signal on my monitor until it detects that there is a problem and boots up to bios...

Hey guys. I want to buy a ryzen 5 3600 and I was wondering if 3000mhz ram would be enough. I'm on a budget so the best for me is this ram model: CMK16GX4M2B3000C15. Is this enough? Thanks in advance.