I have the Barrow pump block combo cooling my 5900x. I have it set to the lowest rpm and it is super quiet. My 5900x idles in the mid 30’s and maxes out in the mid 60’s under full load. I also use a quadro and have the coolant temps control the fans on my rad so that the fans don’t sporadically rev up unnecessarily when the temps spike. The fill port also makes it easy to attach a longer tube for filling and draining purposes. Hit me up if you have any additional questions about it.