Non-volatile type memory modules for main memory

A non-volatile memory module pluggable into main memory, the non-volatile memory module comprising:

• a memory module printed circuit board with a memory module edge connector to plug into a memory module socket within a main memory;
• a plurality of non-volatile memory integrated circuits coupled to the memory module printed circuit board;
• and
• a plurality of buffer integrated circuits coupled between the memory module edge connector and the plurality of non-volatile memory integrated circuits, wherein the plurality of buffer integrated circuits are each coupled to the plurality of non-volatile memory integrated circuits with one or more data busses and to the memory module edge connector with a data bus, wherein each of the plurality of buffer integrated circuits includes
• a cross-bar switch coupled between the one or more data busses connected to the memory integrated circuits and the data bus connect to the memory module edge connector, the cross bar switch to write data onto the data bus at the memory module edge connector from the memory integrated circuits and to read data from the data bus at the memory module edge connector and couple the data onto one of the one or more data buses connected to the memory integrated circuits.