A non-volatile memory module for preventing system failure and a system including the same, in which the non-volatile memory system includes a first socket and a second socket each having a notch coupler, a first memory module, a memory controller configured to control the first memory module, and a printed circuit board on which the memory controller and the first and second sockets are installed and electrical signal lines are formed between the memory controller and the first and second sockets. The first memory includes a plurality of non-volatile memory devices and stores system software. The first memory module has a structure such that it can be installed at the first socket but cannot be installed at the second socket. The non-volatile memory system may further include a second memory module for an extension of the memory capacity. The second memory module has a structure such that it can be installed at the second socket but cannot be installed at the first socket. Accordingly, system failure caused by misusage of a non-volatile memory module can be prevented.