Patent ID: 7761623

Claim:
A system comprising: a mother-board having processor sockets, memory module sockets, and one or more expansion sockets, each of the processor sockets being configured to receive a processor and each of the memory module sockets being configured to receive a memory module of a main memory, each processor socket being directly coupled to one or more dynamic random access memory (DRAM) channels via corresponding printed circuit board traces, each of the one or more dynamic random access memory channels having one or more of the memory module sockets coupled to the corresponding printed circuit board traces, the one or more expansion sockets and the processor sockets being coupled to an interconnect fabric of the mother-board; and at least one main memory expansion board coupled to at least one of the one or more expansion sockets to expand the main memory of the mother board, the at least one main memory expansion board includes at least one non-DRAM memory channel, and a first non-DRAM memory controller configured to control read and write accesses of data with the at least one non-DRAM memory channel.