Multi-channel memory connection system and method

1. A multi-channel memory connection system, comprising:

a circuit board comprising a plurality of memory connectors configured to receive either a memory module or a memory riser,

wherein at least one memory connector includes a primary port connected to at least one bi-directional memory channel on the circuit board and a secondary port connected to the at least one bi-directional memory channel on the circuit board,

and the memory riser includes a bi-directional memory channel connectable to the primary port and another bi-directional memory channel connectable to the secondary port, wherein the bi-directional memory channel and the another bi-directional memory channel are not connected and are operable to simultaneously send data to a memory controller, and

when the memory riser is connected to the at least one memory connector, the at least one bi-directional memory channel on the circuit board operates as two different bi-directional memory channels comprising a first bi-directional memory channel connected to the bi-directional memory channel in the memory riser via the primary port and a second bi-directional memory channel connected to the another bi-directional memory channel in the memory riser via the secondary port,

and when the memory module is connected to the at least one memory connector, the at least one bi-directional memory channel on the circuit board operates as a single bi-directional memory channel at the at least one connector, wherein the single bi-directional memory channel is connected to the memory module via the primary port and the secondary port.

2. The system of claim 1 , further comprising the memory controller configured to, in response to the memory module being disposed in the at least one memory connector, cause the memory module disposed in the at least one memory connector to be configured as a last memory module in the at least one channel.

3. A method of multi-channel memory connection, comprising:

coupling a plurality of memory connectors to a circuit board, at least one of the plurality of memory connectors configured to receive either a memory module or a memory riser, wherein the at least one memory connector includes a primary port connected to at least one bi-directional memory channel on the circuit board and a secondary port connected to the at least one bi-directional memory channel on the circuit board; and

connecting at least one bi-directional memory channel to the at least one memory connector along the circuit board, wherein

the memory riser includes a bi-directional memory channel connectable to the primary port and another bi-directional memory channel connectable to the secondary port, wherein the bi-directional memory channel and the another bi-directional memory channel are not connected and are operable to simultaneously send data to a memory controller, and

when the memory riser is connected to the at least one memory connector, the at least one bi-directional memory channel along the circuit board operates as two different bi-directional memory channels comprising a first bi-directional memory channel connected to the bi-directional memory channel in the memory riser via the primary port and a second bi-directional memory channel connected to the another bi-directional memory channel in the memory riser via the secondary port,

and when the memory module is connected to the at least one memory connector, the at least one bi-directional memory channel on the circuit board operates as a single bi-directional memory channel at the at least one connector, wherein the single bi-directional memory channel is connected to the memory module via the primary port and the secondary port.

4. A multi-channel memory connection system, comprising:

a memory riser connectable to a first memory connector directly disposed on a circuit board, wherein the first memory connector includes a primary port connected to at least one bi-directional memory channel on the circuit board and a secondary port connected to the at least one bi-directional memory channel on the circuit board, the memory riser comprising:

a bi-directional memory channel connectable to the primary port and another bi-directional memory channel connectable to the secondary port, wherein the bi-directional memory channel and the another bi-directional memory channel are not connected and are operable to simultaneously send data to a memory controller, and

when the memory riser is connected to the first memory connector, the at least one bi-directional memory channel along the circuit board operates as two different bi-directional memory channels comprising a first bi-directional memory channel connected to the bi-directional memory channel in the memory riser via the primary port and a second bi-directional memory channel connected to the another bi-directional memory channel in the memory riser via the secondary port,

and when a memory module is connected to the first memory connector, the at least one bi-directional memory channel on the circuit board operates as a single bi-directional memory channel at the first memory connector, wherein the single bi-directional memory channel is connected to the memory module via the primary port and the secondary port.

5. The multi-channel memory connection system of claim 4 , the memory riser being inserted into, and thereby electrically coupled to, the first memory connector.

6. The multi-channel memory connection system of claim 4 , wherein a second memory connector and a third memory connector are directly disposed on, and thereby electrically coupled to, the memory riser.

7. A circuit board comprising:

a first memory connector; and

at least one bi-directional memory channel along the circuit board, wherein the first memory connector includes a primary port connected to at least one bi-directional memory channel along the circuit board and a secondary port connected to the at least one bi-directional memory channel along the circuit board, wherein

a memory riser is connectable to the first memory connector, and the memory riser includes a bi-directional memory channel connectable to the primary port and another bi-directional memory channel connectable to the secondary port, wherein the bi-directional memory channel and the another bi-directional memory channel are not connected and are operable to simultaneously send data to a memory controller, and

when the memory riser is connected to the first memory connector, the at least one bi-directional memory channel along the circuit board operates as two different bi-directional memory channels comprising a first bi-directional memory channel connected to the bi-directional memory channel in the memory riser via the primary port and a second bi-directional memory channel connected to the another bi-directional memory channel in the memory riser via the secondary port,

and when a memory module is connected to the first memory connector, the at least one bi-directional memory channel on the circuit board operates as a single bi-directional memory channel at the first memory connector, wherein the single bi-directional memory channel is connected to the memory module via the primary port and the secondary port.

8. The circuit board of claim 7 , wherein a second memory connector and a third memory connector are directly disposed on the circuit board.

9. The circuit board of claim 7 , the first memory connector directly disposed on, and thereby electrically coupled to the memory riser.

10. The circuit board of claim 7 , the first memory connector directly disposed on, and thereby electrically coupled to the memory riser inserted into, and thereby electrically coupled to, a fourth memory connector directly disposed on the circuit board.