My Bios reads my ram at 3000mhz but msi afterburner and cpu-z reads my ram at 2000mhz why is that?

Cpu- ryzen 5 2400g
Motherboard- asus rog strix b350f gaming
Gpu- radeon rx580
I have set a profile 1 in bios with D.O.C.P but these programs still read my ram at 2000mhz
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