Case H500M - 3 pin ARGB in MasterCase Maker 5 Posted March 16, 2019 Hi i have just purchased and built my PC with the coolermaster H500M case using the Asus ROG Strix B450-F Gaming motherboard... This case comes with a 3 pin ARGB connector for the front 200mm fans which needs to go into a motherboard RGB header, however the RGB headers on this motherboard are 4 pin's. Is there anyway of getting the 3 pin connected to the motherboard using the 4 pin header? Is there a converter or an adaptor? or something? anything??? Please help, thank you.