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Keep in mind than addressable RGB items use a 5v 3 pin connection and regular RGB uses a 12v 4 pin connection so the headers are not compatible with each other, there's also 12v 5 pin WRGB headers on some motherboards that adds a separate white channel but you can use regular 4 pin headers on them. The regular 12v headers support RGB where you change the color of all connected LEDs at the same time and addressable RGB is used for RGB things where each light can be set to different colors, when you see the light shows with multiple colors displayed at the same time but synced in a pattern that's addressable. Both types of headers are used for things like fans and light strips, RGB memory and the lights on the actual motherboards don't use a header and some things use a USB header but most of them can't be controlled by the motherboard software(I believe but haven't fully confirmed the Wraith prism cooler that comes with the 2700x is one exception to that).
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