On MSI motherboards, they advertise the rgb headers as 4 pin rgb led connectors and 3-pin RAINBOW LED connectors. I am just clarifying if anyone knows if the 3-pin RAINBOW LED connectors are the same thing as normal 3 pin argb 5v headers or if they are something different and the motherboard I am looking at doesn't have Argb headers. The motherboard is the MSI B550 Gaming Plus, and I will leave a link to the product page below.
https://www.msi.com/Motherboard/MPG-B550-GAMING-PLUS/Specification
https://www.msi.com/Motherboard/MPG-B550-GAMING-PLUS/Specification