Intel 805xx product codes

Intel discontinued the use of part numbers such as 80486 in the marketing of mainstream x86-architecture microprocessors with the introduction of the Pentium brand in 1993. However, numerical codes, in the 805xx range, continued to be assigned to these processors for internal and part numbering uses. The following is a list of such product codes in numerical order:

Product code	Marketing name(s)	Codename(s)
80500	Pentium	P5 (A-step)
80501	Pentium	P5
80502	Pentium	P54C, P54CS
80503	Pentium with MMX Technology	P55C, Tillamook
80521	Pentium Pro	P6
80522	Pentium II	Klamath
80523	Pentium II, Celeron, Pentium II Xeon	Deschutes, Covington, Drake
80524	Pentium II, Celeron	Dixon, Mendocino
80525	Pentium III, Pentium III Xeon	Katmai, Tanner
80526	Pentium III, Celeron, Pentium III Xeon	Coppermine, Cascades
80528	Pentium 4, Xeon	Willamette (Socket 423), Foster
80529	Celeron	Timna (canceled)
80530	Pentium III, Celeron	Tualatin
80531	Pentium 4, Celeron	Willamette (Socket 478)
80532	Pentium 4, Celeron, Xeon	Northwood, Prestonia, Gallatin
80533	Pentium III	Coppermine (cD0-step)
80535	Pentium M, Celeron M 310-340	Banias
80536	Pentium M, Celeron M 350-390	Dothan
80537	Core 2 Duo T-series, Celeron M 5xx	Merom
80538	Core Solo, Celeron M 4xx	Yonah
80539	Core Duo, Pentium Dual-Core T-series	Yonah
80541	Itanium	Merced
80546	Pentium 4, Celeron D, Xeon	Prescott (Socket 478), Nocona, Irwindale, Cranford, Potomac
80547	Pentium 4, Celeron D	Prescott (LGA775)
80550	Dual-Core Xeon 71xx	Tulsa
80551	Pentium D, Pentium EE, Dual-Core Xeon	Smithfield, Paxville DP
80552	Pentium 4, Celeron D	Cedar Mill
80553	Pentium D, Pentium EE	Presler
80555	Dual-Core Xeon 50xx	Dempsey
80556	Dual-Core Xeon 51xx	Woodcrest
80557	Core 2 Duo E-series, Dual-Core Xeon 30xx, Pentium Dual-Core E-series	Conroe
80560	Dual-Core Xeon 70xx	Paxville MP
80562	Core 2 Quad, Core 2 Extreme QX6xxx, Quad-Core Xeon 32xx	Kentsfield
80563	Quad-Core Xeon 53xx	Clovertown
80569	Core 2 Quad Q9xxx, Core 2 Extreme QX9xxx	Yorkfield
80570	Core 2 Duo E8xxx	Wolfdale
80576	Core 2 Duo T9xxx, Core 2 Extreme X9xxx	Penryn
80577	Core 2 Duo T8xxx	Penryn-3M