Arix Corp duly introduced its new top-of-the-line machines as the System90 series, claiming that the multiple 68020-based machines span a performance range of 4 MIPS to 30 MIPS. The building block of the family is a 25MHz 68020 with 64Kb cache and 68881 floating point co-processor. The machines are built around a 64 bit parallel synchronous bus running at a sustained 128Mbytes per-second. The shared memory system supports dynamic load balancing and symmetrical processing under the Arix-OS/90 implementation of Unix System V 3.1 with multi-processing extensions. The San Jose company claims that performance increases almost linearly as additional processors are added. The machines support the input-output controllers and peripherals of the existing 800 series. The System90 Model 40, with up to four CPUs, supports up to 256 concurrent users and end user prices are likely to go from $100,000 to $225,000; the Model 80, with up to eight CPUs, takes up to 512 concurrent users and go from $125,000 to $500,000; both are out immediately.