The RGB won't work unless they are hooked upto a data source to actually change the RGB by iCue software, which almost always in the new pump designs is a USB mini to a USB2 header on the motherboard.
Sata power drives the pump and fans, iCue determines speeds and rgb etc. Lighting and power are 2 different circuits, you can't just hook up power and get lighting to work. It has to have directions, such as what color, what affect, what intensity etc. That's provided by data connection.
I've never heard of a 4pin (x6) Sata power plug unless it's a proprietary plug to convert standard Sata 15pin power to a mini plug in the side of the pump housing. You'll still need to connect the USB cable for the iCue software to control speeds and...