OK, good info. I'll give that a try. Thanks!

2- 420 rads, GPU, CPU and RAM water blocks. Getting 190 L/H with the one pump. My hope was to make it a bit quieter and reduce the idle power consumption, particularly when in reduced C states.

Just had a D5 Next pump fail. I'll contact support and get it replaced, but I have a question. I have this pump on a program that detects system idle, and when idle it slows it down to 30%. When not idle, it runs at 100%. Can varying the speed contribute to pump failure?