Computer system, expansion component, auxiliary supply component and use thereof

An expansion card for connection to first expansion connection of a system board of a computer system, wherein the system board further comprises a processor, a chip set and a second expansion connection, and each one of the first and second expansion connection is assigned a fixed power budget to supply the expansion card, the expansion card comprising:

• a first plug connector for connection of the expansion card to the first expansion connection;
• a second plug connector to receive an auxiliary supply cable, said auxiliary supply cable supplies at least part of an operating energy allocated to the second expansion connection directly to the expansion card connected to the first expansion connection;
• at least one third plug connector to supply an additional component or an external peripheral device with an operating energy;
• and
• a power control circuit electrically connected to the first plug connector, the second plug connector and the at least one third plug connector, the power control circuit adapted to limit the power taken-up via the first plug connector to the fixed power budget and to take-up from the second plug-connector at least part of an operating energy exceeding the fixed power budget, allocated to the second expansion slot and taken up by the expansion card and/or delivered via the at least third plug connector.