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Intel Processor Transistor Count | Processor model | Transistor Count | Year | Intel 4004 | 2,300 | 1971 | Intel 8008 | 2,500 | 1972 | Intel 8080 | 4,500 | 1974 | Intel 8085 | 8,500 | 1976 | Intel 8086 | 29,000 | 1978 | Intel 8088 | 29,000 | 1979 | Intel 80186 | 55,000 | 1982 | Intel 286 | 134,000 | 1982 | Intel 386 | 275,000 | 1985 | Intel 486 | 1,200,000 | 1989 | Intel Pentium | 3,100,000 | 1993 | Intel Pentium II | 7,500,000 | 1997 | Intel Pentium III | 9,500,000 | 1999 | Intel Pentium 4 | 42,000,000 | 2000 | Intel Itanium | 25,000,000 | 2001 | Intel Itanium 2 | 220,000,000 | 2003 | Intel Itanium 2 | 592,000,000 | 2004 | Core 2 duo | 291,000,000 | 2006 | Core i7 (quad) | 731,000,000 | 2008 | Quad-core Itanium | 2,000,000,000 | 2010 | Six-Core core i7/8 | 2,270,000,000 | 2011 | 8-Core Itanium | 3,100,000,000 | 2012 | 62-Core Xeon Phi | 5,000,000,000 | 2012 | Six-core Core i7 Ivy Bridge E | 1,860,000,000 | 2013 | Quad-core + GPU Core i7 Haswell | 1,400,000,000[21] | 2014 | 8-core Core i7 Haswell-E | 2,600,000,000[27] | 2014 | 15-core Xeon Ivy Bridge-EX | 4,310,000,000[28] | 2014 | 18-core Xeon Haswell-E5 | 5,560,000,000[29] | 2014 | Duo-core + GPU Core i7 Broadwell-U | 1,900,000,000[23] | 2015 | Computer Processor Historyhttp://www.computerhope.com/history/processor.htmIntel Chips Timelinehttp://www.intel.com/content/www/us/en/history/history-intel-chips-timeline-poster.html |

I think the growth is going surprisingly fast, every 2 years they are doing double of the previous amount of transistors used in integrated circuits.
Can you predict when 100 billion, or even one trillion, transistors may fit on a single chip?
If the Moore’s law is still in play and continues to double transistors in a chip every 2 years in approximately 2022 for it to hold around 100 billion and for one trillion in 2028.
The conclusion follows from projecting Moore's law into the future. If the doubling of computing power every two years continues to hold, "then by 2030 whatever technology we're using will be sufficiently small that we can fit all the computing power that's in a human brain into a physical volume the size of a brain." explained Peter Denning.

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