My motherboard only outputs 12W on the headers, is this causing problems, or is the pump just not working at full power?I used a EK-DDC 3.2 which I rewired to be supplied from the 4 pin on my motherboard (Z390 I AORUS PRO WIFI).
The motherboard has hybrid fan headers that can support up to 24W, the pump is rated at 18W. Check what fan headers your motherboard has and rewire to use the 4 pin?