Similarly, you may ask, what is an RGB header on a motherboard?
RGB or ARGB headers are used to connect RGB LED strips and other RGB accessories to your PC. However, an RGB header (usually a 12V 4-pin connector) can only control colors on a strip in a limited number of ways.
Beside above, does my motherboard support RGB? DRagor : Nope, that motherboard does not have any RGB headers. That does not mean you can't use those fans, you will be however unable to control the light effects in any way.
Also question is, do all motherboards have RGB headers?
Most motherboards come with two RGB headers, each supplying 12V of power. However, if you have a particularly large PC case that you plan on filling with multiple RGB fans, each requiring its own header, this quickly becomes a problem.
Can you use RGB fans without RGB header?
No they aren't compatible with these fans those all use proprietary systems where the Coolermaster ones use the common RGB SMD5050 type standard.