The initial 3081 offered, the 3081D, was a 5
MIPS machine. The next offering, the 3081K, was a 7 MIPS machine. Last came the 3081G, again a 5 MIPS machine. The 3081D was announced Nov 12, 1980; the 3081K came nearly a year later; the 3081G was introduced September 3, 1982 as part of the initial 3084 announcement. The dyadic concept offers "under the cover" dual processors. All models of 3081 and 3083 had the same size, components and footprint; the CPU itself (3081 or 3083), the service processor that also contained the channels (3082), and the water pump/coolant unit (3087). The 308X Processor Complex was using 400 Hz power, this could be supplied by either an optional motor/generator unit (3089), or it could be supplied by an external power source.
3081 as successor to 3033 Some key technological features of the 3081, compared to the previous most powerful processor, the
3033, were the following: • About 800,000 circuits implemented in
large scale integration, using up to 704 logic circuits per chip, which provided the required performance, reliability, and serviceability that were design goals • "Elimination of one complete level of packaging, the card level" Both central processors have access to
channels (as many as 24), and main memory (up to 32 megabytes). ==IBM 3083==