I am running in the MEDION MT9 housing on ASUS P8Z77-M with IP Core i7 3770K Übertackt normal with UEFI BIOS to 4,233 MHz. Revolves around the 400 U / min. Had in the BIOS min. Speed of 600 rev / min. "Ignore" to make. Runs absolutely inaudible !!! Have to. Under full load never to min 600 U / min. get. Fits to the accessory for AMD and Intel and AMAZON now for less than 50, - EUR. TOP !!! BUY !!