If there’s 3.3v power going to the drives, you need to 3.3v mod them.
Preferred methods to resolve 3.3v issues:
The Custom Cable Mod: Use this SATA cable - https://amzn.to/2GA1kVz
Remove the 3.3v wire mod Use this SATA cable - https://amzn.to/2GA1kVz
Things that also work:
Tape mod: Kapton tape - https://amzn.to/2WfiUok
Or, simply buy this 5x Molex SATA splitter Use this cable - https://amzn.to/2DC5CuT