The Cray-3 was a vector supercomputer, Seymour Cray 's designated successor to the Cray-2. The system was one of the first major applications of gallium arsenide (GaAs) semiconductors in computing, using hundreds of custom built ICs packed into a 1 cubic foot (0.028 m) CPU.

The CRAY-3 is the first super- computer to use gallium arsenide (GaAs) integrated circuits for all of its logic circuitry. The development of GaAs digital circuits was a fundamental step in enabling the CRAY-3 to attain the fastest clock cycle time available in a computer system (two nanosec- …

Each processor will be constructed from four modules. The whole machine, including the central memory, will be built from 200 modules, each contain 1024 VLSI circuits, and be built from circuit wafers stacked and bonded together.

Four modules comprise a processor. There are four processors in the CRAY-3 at NCAR. Old and new computational tools: pencil and CRAY-3 module. (Photo courtesy Cray Computer Corporation.) In addition to its processor modules, NCAR's CRAY-3 has 64 memory modules and 4 input/output modules.

Appears In: Smaller and Faster: The Cray-2 and 3. <p>Unlike Cray’s previous designs, the Cray-3 used unproven technology—gallium arsenide—and Cray had to invest in the company making them. The clock speed of 474 Mhz was impressive for the time, but the machine was difficult to manufacture.</p>

Dec 31, 2014 · From the bitsavers.org collection, a scanned-in computer-related document.

The Cray-3/SSS (Super Scalable System) was a pioneering massively parallel supercomputer project that bonded a two-processor Cray-3 to a new SIMD processing unit based entirely in the computer's main memory. [1][2] It was later considered as an add-on for the Cray T90 series in the form of the T94/SSS, but there is no evidence this was ever built.

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 CRAY-3 offers a balanced combination of high-speed vector processing, very fast scalar processing and the largest directly addressable memory available in a general purpose scientific computer (up to two gigawords). one system management processor, up to two These features, combined with a highly gigawords of common memory and up to 15 ...

Appears In: Smaller and Faster: The Cray-2 and 3.