High-capacity computer modules

A computer comprising:

• a computer system comprising:
• a main-logic board;
• a first socket on the main-logic board;
• and
• a second socket on the main-logic board;
• a first computer module comprising:
• a first board comprising:
• a first card edge extending from a first side of the first board and located in the first socket, wherein the first card edge has a first shape and a first plurality of contacts having a first pinout, and wherein a position of the first card edge on the first side, and the first shape and first pinout of the first card edge, are compliant with a Peripheral Component Interconnect (PCI) standard;
• a second card edge extending from the first side and located in the second socket and having a second shape and a second plurality of contacts having a second pinout, wherein the second shape and second pinout are not compliant with a PCI standard;
• and
• a plurality of circuits.