[thermaltake power supply compatibility]

Hello,

I am looking at buying the Thermaltake Toughpower iRGB Plus 750W 80+ Gold or Thermaltake Toughpower GF1 ARGB 750W 80+ Gold power supply from my new build. I noticed that the RGB header is 5V. I currently have the Asus Prime X390-A motherboard which has a 12v connector. Are either of theses power supplies compatible with this mother board or will the difference in voltage mess up either item? I also see they both come with a floppy adapter would the adapter fix the difference in voltage?

Thank you,  

-Coley Pitts