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Pentium Pro
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{{Short description|Sixth-generation x86 microprocessor by Intel}} {{Use mdy dates|date=January 2023}} {{Infobox CPU |name = Pentium Pro |image = Intel Pentium Pro logo.svg |image_size = 150px |caption = |produced-start = {{start date and age|1995|11|01|br=y|p=y}} |produced-end = 1998 |slowest = 150 | slow-unit = MHz |fastest = 200 | fast-unit = MHz |fsb-slowest = 60 | fsb-slow-unit = MT/s |fsb-fastest = 66 | fsb-fast-unit = MT/s |manuf1 = Intel |arch = x86 |size-from = 500 nm |size-to = 350 nm |microarch = [[P6 (microarchitecture)|P6]] |sock1 = [[Socket 8]] |numcores = 1 |predecessor = [[Pentium (original)|Pentium]] |successor=[[Pentium II]], [[Pentium II Xeon]] | support status = Unsupported |designfirm=Intel|soldby=[[Intel]]|code=80521|l2cache=256 KB β 1 MB|data-width=64 bits|address-width=36 bits|virtual-width=32 bits|l1cache=16 KB (8 KB instructions + 8 KB data)|transistors1=5.5 million|application=[[Server (computing)|Server]]<br/>[[Workstation]]|cpuid=0F619h}} The '''Pentium Pro''' is a sixth-generation [[x86]] [[microprocessor]] developed and manufactured by [[Intel]] and introduced on November 1, 1995.{{r|Fisher_19951102|p=D-2}} It implements the [[P6 (microarchitecture)|P6 microarchitecture]] (sometimes termed i686), and was the first x86 Intel CPU to do so. The Pentium Pro was originally intended to replace the original [[Pentium (original)|Pentium]] in a full range of applications. Later, it was reduced to a more narrow role as a server and high-end desktop processor. The Pentium Pro was also used in [[supercomputer]]s, most notably [[ASCI Red]], which was the first computer to reach over one [[teraFLOPS]] in 1996 and held the number one spot in the [[TOP500]] list from 1997 to 2000. ASCI Red used two Pentium Pro CPUs on each computing node.{{r|ASCI_Red}} While the Pentium and Pentium MMX had 3.1 and 4.5 million [[transistor]]s, respectively, the Pentium Pro contained 5.5 million transistors.{{r|Brey_2003|p=[https://archive.org/details/intelmicroproces0000brey_x6t8/page/12 12]}} It was capable of both dual- and quad-processor configurations and only came in one form factor, the relatively large rectangular [[Socket 8]]. The Pentium Pro was succeeded by the [[Pentium II Xeon]] in 1998.
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