The noise is pretty low. The pump needs to stay over 60% or it makes a noise I can hear. It's all EKWB stuff (except the fans). I need to better tune my fan profiles (and find exactly which fans it is that I can hear).
edit: once I put the water block on, I could hear some coil whine that I didn't notice in my old system. I assume it is because I couldn't hear it over the fans before and now I can.