That's a very disappointing answer. If a PWM pump will work with a MB CPU fan header but not the Aquaero 6 then it should be obvious that there is a problem with the PWM control implementation with the Aquaero, Telling someone to power control the pump totally sidesteps the issue. I have the same problem and in order to have PWM control over my pump I have to plug the PWM cable into fan headers on my motherboard. Any chance that this issue could be addressed with a firmware update?