discussion forum message Name: bhtooefr Date: May 09, 2004 at 18:20:19 Subject: Re: 80786 class In Reply To: 80786 class by Exophase on April 17, 2004 at 15:53:50 Text: Run CPU-Z on it. Actually, there's no 786, if Intel's to be believed. Any CPU that Intel labeled as a number is that number (i.e., 80486). Even AMD and Cyrix CPUs work the same way on measurements, up to the 5x86, where the AMD is a 80486, and the Cyrix could be considered an 80588 or 80586SX. In Pentiums, it's easy until the NexGen Nx586, which could be called an 80586 (on product positioning), an 80686 (on architecture), or an 80386 (on instruction set). The AMD K6 is also difficult, but is probably considered an 80686 (I don't know what CPU-Z would report as the family). All of the other Pentium clones are pretty clearly 80586s. Once we get into the P6 (PPro/P2/P3/PM) core and the K7 (Athlon) core, we're definitely in 80686 territory. The VIA C3 core could be considered an 80586-class on arch, or 80686-class on instruction set. Once we get into NetBurst (P4) and K8 (A64, AFX, Opteron), it gets tricky. CPUIDs on both of these CPUs report Family F, meaning that they are 801586 CPUs (AFAIK, it's hex, so maybe 80F86 is better fitting). Confusing? You bet. | What makes a CPU 80786 class as opposed to 80686? And why is Pentium 4 80786 while Pentium M and Athlon 64 are 80686? | | - Exophase | post a followup message (Be nice... or be blocked. Be technical... or be erased.) Name: optional link title: eMail: optional link URL: Subject: optional image URL:   Insert line breaks by hand when only about one inch remains at the right side. Otherwise your message will be unreadable. Text: | Run CPU-Z on it. Actually, there's no 786, if Intel's to be believed. | Any CPU that Intel labeled as a number is that number (i.e., 80486). Even | AMD and Cyrix CPUs work the same way on measurements, up to the 5x86, where | the AMD is a 80486, and the Cyrix could be considered an 80588 or 80586SX. | In Pentiums, it's easy until the NexGen Nx586, which could be called an | 80586 (on product positioning), an 80686 (on architecture), or an 80386 (on | instruction set). The AMD K6 is also difficult, but is probably considered | an 80686 (I don't know what CPU-Z would report as the family). All of the | other Pentium clones are pretty clearly 80586s. Once we get into the P6 | (PPro/P2/P3/PM) core and the K7 (Athlon) core, we're definitely in 80686 | territory. The VIA C3 core could be considered an 80586-class on arch, | or 80686-class on instruction set. Once we get into NetBurst (P4) and K8 | (A64, AFX, Opteron), it gets tricky. CPUIDs on both of these CPUs report | Family F, meaning that they are 801586 CPUs (AFAIK, it's hex, so maybe | 80F86 is better fitting). Confusing? You bet. || What makes a CPU 80786 class as opposed to 80686? And why is Pentium 4 80786 while Pentium M and Athlon 64 are 80686? || || - Exophase || |     Note: The above eMail form fields may look unaligned if you are using a browser other than Netscape Navigator version 3.0. currently posted followup messages (You may have to press the RELOAD button of your browser.)