I have a ryzen 5 2600 and a x370 mobo (bios updated to work with ryzen 2nd gen). I know ryzen has some issues with 4 DIMMs populated, but I just received a new kit 2x8gb identical to my current 2x4gb (identical CAS, manufacturer, just the size is different). Should I populate 4 slots or just sell my old 2x4gb kit