Computer systems with multiple system configurations

A motherboard suitable for multiple system configurations by connecting to a module with a first Northbridge area comprising a first CPU, a first system memory, a first accelerated graphics port and a first Northbridge;

• the motherboard comprising:
• a second Northbridge area, comprising a second CPU, a second system memory, a second accelerated graphics port and a second Northbridge;
• a Southbridge;
• an expansion connector for connection of the module;
• and
• a bus switching device selectively coupled between the second Northbridge area, the Southbridge and the expansion connector;
• wherein the bus switching device electrically connects the second Northbridge area to the Southbridge when the module is not connected to the expansion connector and electrically connects the expansion connector to the Southbridge when the module is connected to the expansion connector.

A computer system with multiple system configurations comprising:

• a module with a first Northbridge area comprising a first CPU, a first system memory, a first accelerated graphics port and a first Northbridge;
• and
• a motherboard comprising:
• a second Northbridge area, comprising a second CPU, a second system memory, a second accelerated graphics port and a second Northbridge;
• a Southbridge;
• an expansion connector for connection of the module;
• and
• a bus switching device selectively coupled between the second Northbridge area, the Southbridge and the expansion connector;
• the bus switching device electrically connects the second Northbridge area to the Southbridge when the module is not connected to the expansion connector and electrically connects the expansion connector to the Southbridge when the module is connected to the expansion connector.