Sun released the first Sparc (Scalable Processor Architecture) processor in 1986, but had the instruction set architecture developed already in 1985. The first CPU commercially available was the Sparc v7, a 32-bit RISC processor, which replaced the Motorola 68000 series and celebrated its debut in the Sun-4 workstation. The first version achieved 10 million instructions per second (MIPS) and was about three times as fast as the fastest CISC processors available in 1987. The initial Sparc v7 was a 20,000-gate, 1.3-micron CMOS gate array with a clock speed of 16.67 MHz and was rated at a maximum performance of 3 MFlops. It was also a seriously expensive processor with a price tag of $39,900. Over the following years, the SPARC architecture was licensed to Sun, who in turn was recently acquired by Oracle. The most recent iterations of the Sparc processor are Fujitsu's SPARC64 VIIIfx, which is used in the Riken Supercomputer as well as Oracle’s Sparc T4.