<Tr> <Th> Predecessor </Th> <Td> Pentium III </Td> </Tr> <Tr> <Th> Successor </Th> <Td> Pentium D, Core 2 </Td> </Tr> <P> Pentium 4 is a line of single - core central processing units (CPUs) for desktops, laptops and entry - level servers introduced by Intel on November 20, 2000 and shipped through August 8, 2008 . They had a seventh - generation x86 (32 - bit) microarchitecture, called NetBurst, which was the company's first all - new design since the introduction of the P6 microarchitecture of the Pentium Pro CPUs in 1995 . NetBurst differed from P6 (Pentium III, II, etc .) by featuring a very deep instruction pipeline to achieve very high clock speeds . Intel claimed that NetBurst would allow clock speeds of up to 10 GHz in future chips; however, severe problems with heat dissipation (especially with the Prescott Pentium 4) limited CPU clock speeds to a much lower 3.8 GHz . </P> <P> In 2004, the initial 32 - bit x86 instruction set of the Pentium 4 microprocessors was extended by the 64 - bit x86 - 64 set . </P>

How many cores does a pentium 4 have