Editing Pentium (original) (section)

==={{Anchor|P5}}P5===
[[File:Intel Pentium arch.svg|right|thumb|upright=1|Intel Pentium microarchitecture]]
The first Pentium microprocessor core was code-named "P5". Its product code was 80501 (80500 for the earliest [[Stepping level|steppings]] Q0399). There were two versions, specified to operate at 60&nbsp;MHz and 66&nbsp;MHz respectively, using [[Socket 4]]. This first implementation of the Pentium was released using a 273-pin PGA form factor and ran on a 5v power supply. (descended from the usual [[transistor-transistor logic]] (TTL) compatibility requirements). It contained 3.1 million [[transistor]]s and measured 16.7&nbsp;mm by 17.6&nbsp;mm for an area of 293.92&nbsp;mm<sup>2</sup>.<ref name="MPR 1993-03-29">{{cite magazine |last=Case |first=Brian |date=March 29, 1993 |title=Intel Reveals Pentium Implementation Details |magazine=[[Microprocessor Report]]}}</ref> It was fabricated in a [[800 nm process|800&nbsp;nm]] bipolar complementary metal–oxide–semiconductor ([[BiCMOS]]) process.<ref>{{cite web| url = http://datasheets.chipdb.org/Intel/x86/Pentium/24159502.pdf| title = Intel Pentium processor (510\60, 567\66). Nov 1994}}</ref> The 5-volt design resulted in relatively high energy consumption for its operating frequency when compared to the directly following models.