This device, called a "brick," formed part of the Central Processing Unit (CPU) of the Cray 3 supercomputer. It ran at 500-550 MHz and used 2ns Gallium Arsenide (GaAs) integrated circuits (ICs). There are 32 modules per brick, 1024 ICs per module, and up to 8 bricks per machine. The base of the brick is gold-plated copper and efficiently transferred heat to the Cray 3's CFC-based coolant system. System cost was between $20 and 30 million.
