for the fan noise - try running the stock fan at 5V using one of these (or wire it yourself) >snip image<
5V is sufficient for running at 381.25MHz/1255GH/63C/58C when drawing in air thats about 5C. In the same conditions 7V is about 30% louder and brings the temps to 57C/53C. for room temperaure intake, 5V probably isnt suitable for running above 350MHz
do you have this product link as there are 12 pages related to molex awesome site! thanks
no clue on a product link, but im sure ebay/google/amazon/newegg would have some viable options. Alternatively you can rewire any old molex adapter if you're half-decent with tinkering, just GND to GND and 12V to 5V