Server system with fan speed control and servers thereof

A server system comprising:

• a server cabinet;
• a plurality of servers each comprising:
• a plurality of electronic components;
• a detecting module to detect a plurality of performance characteristics of the plurality of electronic components;
• a comparison module to obtain a rotation speed according to the plurality of performance characteristics provided by the detecting module;
• and
• an executing module to convert the rotation speed provided by the comparison module into a fan speed control signal;
• a plurality of fan groups coupled to a rear side of the server cabinet and each comprising a plurality of fans to provide a horizontal airflow;
• and
• a plurality of fan control boards each connected to several of the plurality of servers and one of the plurality of fan groups which is aligned with the several of the plurality of servers, wherein when the fan control board receives one or more fan speed control signals from the several of the plurality of servers, the fan control board converts the fan speed controls into an electrical signal to the fan group, thereby controlling the one of the plurality of fan groups to rotate at a corresponding speed to satisfy heat dissipation needs of the several of the plurality of servers.