I have a CLC280 installed on my 9700k, inside a DG-76 case. Its mounted at the front of the case. Its never quiet, not even at idle. I have 3 Noctua case fans installed as well and you cant hear them at all. The Flow Control software isn't all that useful, doesn't seem to want to let me alter the base or maximum levels on the curve. I always had the mobo settings (z390ftw) set to SMART but I changed it to 50% per a guide I red last night and no change.
Just wondering if anyone has any tips to get it to quiet down. Its connected to the CPU1 header atop the board.