According to the manual (page 37), that JRGB1 connector is for up to 2 meter RGB led strips, not fans. That may be why TheLegendaryBigBoss had problems with it.
Fan headers can usually deliver up to 12V, and you can definitely use two or sometimes even three fans from one thanks to a fan spliter, but your mileage may vary. It's worth noting, tho, that you can't use RGB fans with those splitters as they use more power, obviously.
To solve both of your problems, you could try to find a fan controller hub that has enough room for all your fans. Some of them are manual, meaning that you need to open the case to change the light or the fan speed, but others connect to a spare USB header and allow you to control the fans from Windows. Many brands have their own HUBs, but some of them are locked to their own fans, creating a closed echosystem.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.
