Please help! Should I use gray or black DDR4 slots?

What if i have 4×16 ddr4 and i have 4 slots free and i want to add 2 memory , 2×32 ddr4 Motherboard is Fatal1ty X99 Professional Gaming i7 and CPu , e5

In this short we explain that you cannot install DDR5 memory into a DDR4 slot As an obvious

slot neuschwanstein Além disso ela possui dois slots de memória DDR4 com suporte máximo para 64GB DESEMPENHO A Mancer A520M-DX possui suporte para processadores AMD Ryzen da

slot modal receh DDR4 memory slots typically have 288 pins, require volts of power, and can support memory modules with a maximum capacity of 16GB Number of memory slots