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The Hughes-built Common Integrated Processor (CIP) is the 'brain' of the avionics system. The CIP, which is quite literally the size of a oversized bread box, supports all signal and data processing for all sensors and mission avionics.
There are two CIPs in each F-22, ...
General purpose processing capacity of CIP is rated at more than 700 million instructions per second (Mips) with growth to 2,000 Mips; signal processing capacity greater than 20 billion operations per second (Bops) with expansion capability to 50 Bops;
CIP contains more than 300 Mbytes of memory with growth potential to 650 Mbytes.
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http://www.f22fighter.com/avionics.htm