to help ensure proper system cooling and system reliability, be certain of the following:

    1 each of the drive bays has a drive, or a filler panel and electromagnetic compatibility (emc) shield installed.

    2 there is adequate space around the computer to allow the computer cooling system to work properly. leave about 51 mm (2 in.) of open space around the front and rear of the computer. do not place objects in front of the fans.

    3 you have followed the instructions for cabling provided with optional adapters.

    4 you have replaced a failed fan as soon as possible.