ram troubleshooting

Hey guys, just a quick one.. Not exactly overclocking but technically it is. I haven't encountered that before. I ve bought a set of 16x2 GB Corsair RGB memory CL15 3000mhz. If i select an xmp profile on my z490 G gaming it sets out unusual values. FSB is set to 102.5 ( which i can understand...

I currently have 2x 4gb RAM cards installed. I have bought another 2x of the exact same RAM cards to also be installed in the 1 and 3 RAM slots on my motherboard. I know my motherboard can take 32gbs of RAM so 16 shouldn't be an issue. When I install the second pair of RAM cards, when booting...