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

SO-DIMM DDR4 Memory ddr4 sodimm slot Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for ASUS X507UA Crucial 16GB DDR4-2400 SODIMM CT16G4SFD824A Configuration ID: ddr4 slot vs ddr5 DDR3 DDR4 DDR5 Laptop to Desktop Memory Adapter Card SO-DIMM To PC DIMM Card DDR3 DDR4 DDR5 RAM Connector Adapter Power Supply US $ 18 sold New

ddr4 slot DDR4 SO-DIMMs are high-speed and low power memory modules that use 512Mx8bits DDR4 SDRAM in FBGA package and a 4K-bit serial EEPROM on a 260-pin printed circuit