RGB only works if connected via............MOLEX.
Why no SATA power as i would have expected? Creative Labs has since told me that there's not enough 5 volt power carried over SATA with maxes out about 7.5 watts. Molex, however, can supply up to 55 watts.
Since the AE-5 can power up to four LED strips, it can't be run off of SATA. There is power through the PCIe slot, but that's 12 volts only. While Creative didn't say, I'm going to imagine adding additional hardware to convert 12 volts to 5 volts and bringing it onto the plane of the sound card goes against the point. The extra circuitry would add cost and induce more noise. So yeah, Molex it is.