![]() ![]() They have a tendency to not provide adequate airflow. Chassis which pull air across the SBC are very critical to be measured. Therefore, it is critical that the minimum air flow specification is met if the board is intended to operate in an environment which has maximum specified temperatures. The relatively cool air from outside of your case (the cooler the room where your PC will live, the better) is sucked/pulled in through the front of the case by. Due to the different heights of the components mounted on a SBC board, the air will meet with varying resistance as it flows across the board. Different cases come with a different number of fans (from 0 - 3 or more) - obviously the case with 0 fans will have no airflow and be considered worse than a case that comes with 4 fans however, fit fans into that case with 0 fans (for example, the Lian Li 011D) and all of the sudden you have a case with some of the best thermal performance. In order to maximize airflow in a chassis, all Open slots should be covered. The correct place to measure is directly above the heat sink where the air exits the chassis. Airflow is recommended to be pushed across the SBC's heat sink. In a vertical chassis, it is recommended to have the fans mounted beneath the chassis. The airflow must be measured in the correct location to make sure that there is proper flow. It typically has a wand type probe that you hold over the point that you want to measure. The air flow can be measured with a Air flow meter. Fans are typically rated in CFM, Cubic Feet Per Minute. It is often necessary to measure the LFM to determine if a chassis fans are providing adequate air flow. This is specified in LFM, Linear Feet per minute. The product specification for Single Board Computers (SBC) dictates a minimum air flow in order for the SBC to meet the maximum specified Operating Temperature. ![]()
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