Although the design was similar in idea to a Pentium Pro, the actual performance was more like that of a Pentium. The K5 was based on the AMD Am29k micro architecture with the addition of an x86 decoder. AMD K5 – AMD's first original x86 microarchitecture.Family field of the application, as can be seen on various screenshots on the CPU-Z Validator World Records website.īelow is a list of microarchitectures many of which have codenames associated: The Family hexadecimal identifier number can be determined for a particular processor using the freeware system profiling application CPU-Z, which shows the Family number in the Ext. (The 'K10h' form that sometimes pops up is an improper hybrid of the 'K' code and Family XXh identifier number.)īulldozer / Piledriver / Steamroller / Excavator In hexadecimal numbering, 0F(h) (where the h represents hexadecimal numbering) equals the decimal number 15, and 10(h) equals the decimal number 16.

10h and 0Fh refer to the main result of the CPUID x86 processor instruction. AMD now refers to the codename K8 processors as the Family 0Fh processors. AMD has not used K-nomenclature codenames in official AMD documents and press releases since the beginning of 2005, when K8 described the Athlon 64 processor family. Historically, AMD's CPU families were given a 'K-number' (which originally stood for Kryptonite, an allusion to the Superman comic book character's fatal weakness) starting with their first internal x86 CPU design, the K5, to represent generational changes.

Amd k10 processors