PCIe Wi-Fi card or motherboard Wi-Fi?
PCIe Wi-Fi card or motherboard Wi-Fi?
Consider whether you need a dedicated PCIe Wi-Fi solution or if your device can accommodate a standard Wi-Fi adapter. For reference, the Z390 supports only Wi-Fi 5 built-in, but compatibility with Wi-Fi 6 or better is possible with a compatible PCIe card.
The PCIe card offers greater adaptability because you can purchase any model and swap it out when necessary. With a built-in option, you'd need to replace the entire module. However, the positive aspect is that it's included without additional expense. Keep in mind, though, you won't gain Wi-Fi 6 benefits unless your router supports it.
Some devices need special software to function. It doesn't matter whether they're built into the main board or come as a separate component. Whether you have to install them yourself depends on whether the operating system comes with them pre-installed. Checking the manufacturer's website for your motherboard should show available drivers for its built-in Wi-Fi.