Can't run active yet, as I need to get some screws for the radiator fans. At stock speeds, with no airflow over the rad:

CPU - Idle/Load: 37/47C
GPU - Idle/Load: 34/41C

That's after about half hour load on both CPU (Prime95) and GPU (ATItool scan for artifacts). The temps do creep up slowly as the water in the loop heats.

However, back when I was using a BIX /w 110CFM Sanyo with E4400 at 3300Mhz, I still got similar temps to stock and passive. I think the CPU temps are reporting too high...

As for GPU, with stock cooling I was getting 45C idle and 82C load at stock speeds, so passive WC beats it by a huge margin.

Can't wait to get some fans on there