I just got the antec overture II, and its not as quiet as I thought it would be. Its as loud as a cell phone on vibrate. Most of the noise seems to be coming from the power supply, which is a smart power 2.0. Theres a blue wire that looks like a CPU fan plug coming from the power supply, which if I hook up, the noise gets twice as loud. Even with the wire pulled out, airflow seems good, I'm about 3 feet away from the box and can feel a draft. Is this all normal noise level?