Modern gaming PCs are equipped with lots of great modern connectors. We have USB-C ports, DisplayPort/HDMI ports, and... a PS/2 port? This legacy connector looks like it belongs in the 80s or 90s, and indeed, it probably does. Yet, a lot of modern systems and motherboards, even gaming systems equipped with the latest AMD Ryzen/Intel Core chips, seem to insist on digging this old connector out of its grave. And while it might not make sense to you, or to a lot of people, there are reasons why it's there.