Hello, I have giving myself such a headache trying to figure this out. I am going to get the Asus's ROG Strix B450-I Gaming and I want to get 2 of Cooler Master's MF140R ARGB and 1 MF120R ARGB. I also want to add some amount of CableMod's Addressable RGB Strips. Asus's site states that the motherboard supports "WS2812B addressable RGB LED strips (5V/Data/Ground), with a max power rating of 3A (5V) and a max of 60 LEDs". I cant find anything that tells me how many LEDs the fans have or the 30cm and 60cm strips, I'm not sure if the fans even count towards the 60 LEDs or not. I will also get Cooler Master's MasterLiquid ML120R RGB and I have the same problem (Unsure of the # of Leds). If this made any sense what soever I hope you can help me.
LED Strips: https://cablemod.com/product-category/led-strips/addressable
Fans: http://www.coolermaster.com/cooling/case-fan/masterfan-mf120r-argb and http://www.coolermaster.com/cooling/case-fan/masterfan-mf140r-argb