My motherboard has a WS2812B header for use in addressable RGB LED strips. However I am not using them for those strips, as instead I would like to use the signal to separately control several other RGB LED devices (fans, reservoir, GPU, monoblock, ...). The WS2812B connector itself is rated at 3A (5V) and needs to be split up into 12V RGB signals (I'm sure 500 mA or so will be fine).
I have some experience with Arduino programming and have the equipment to solder, but any solution that makes it work will be fine. However, it is paramount that there is no way that I can damage my motherboard.
To further clarify, this header on the motherboard has the following pins: +5V, Data and Ground. The motherboard is the ASUS ROG Zenith Extreme. You can find the header I'm talking about on page 40 of the manual.
Is this even possible? Is there already some device that makes this work? How would I go about making this work?
Thank you in advance,