I want to buy 2 8gb ddr4 3200mhz and ia have already 2 4gb ddr4 3000mhz.Can i have all of them in the same mother board or must the 4 of them have the same mhz???(i have a ryzen 3 2200g cpu with a gtx 1660 6 gb) and in the future i will buy a better ryzen cpu that s why i want to buy ram with more mhz if i can use my old ram too
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