Storage system and developing usable storage module

The invention relates to a memory system having a system board (10), a memory controller (11) and a plurality of memory modules (12a to 12d) and to a useful purpose memory module. DOLLAR A According to the invention extend from the memory controller from a common control and address bus (CAB) and data buses (DB1 to DB4) of a first and data buses (DB5 through DB8) of a second channel. The memory modules of a first group are coupled to the data buses of the first channel and the memory modules of a second group to the data buses of the second channel, wherein the memory modules share a common control and address bus. A purpose usable storage module comprises a signal input and Signalausgabeberiech, a buffer or a register and a control and address bus. A plurality of memory devices of the module are sequentially connected to an output line of the buffer or register. DOLLAR A use z. B. in high speed computer systems of high efficiency.