How do they make CPUs?

I understand the core is made up of several parts like the cache's, but how much do different P4s of different lines differ? Where is the difference between the P4 a, b and c?

I had a much better usertitle but was caught trying to hack me a better one so I got my current title as a punishment
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  1. www.sandpile.org

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  2. well the first p4 was the williamette core, which had a 100 mhz bus, socket 432, a .18 micron process and a 256 KB l2 cache. THen there was the norwood core, using a sockry 468 interface, a .13 micron process, a 512 KB l2 cache, and the same 12 KB/8KB l1 cache. The original norwood, p4a, used the same 100 mhz bus, the b used a 133 mhz, and the c used the 200 mhz. A note about intel and amd bus speeds: just as ddr ram effectively doubles bandwidth by transferring data twice per clock cycle, intel's cpu buses transfer data 4x per clock cycle, so the p4a is an effective 400 mhz, the b a 533 mhz, and the c an 800 mhz. Amd uses a similar strategy, but their 200 mhz bus speeds on the high end barton chips are an effective 400 mhz speed, and their 166 give a 333 speed. Celerons are based on pentiums, but they are much slower because of lower bus speeds and cache sizes. Xeons are the high end intel chips, mostly used in 3d workstations and such, and are more different, using a different interface and core architecture.
    Any more questions i would be glad to answer
  3. Anandtech, or THG posted a VERY good article on this. Let me go hunt it down....

    My OS features preemptive multitasking, a fully interactive command line, & support for 640K of RAM!
  4. I thought they used gerbil magic?

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    <A HREF="http://www.khmercity.com/city_music//Kerpal Comedy@@ kick my dog~ :-)/Jerky Boys - Kerpal - Airport Pakistani And Hindi Fight.mp3" target="_new">I'm going to get you, you bastard guy</A>.
  5. This isn't exactly a CPU article, but starting with how Graphics chips are made won't be to shabby considering there is alot of smiliariteiss in the production process. However, I'll try to find a better article if I get around to it.

    <A HREF="http://www.anandtech.com/video/showdoc.html?i=1711" target="_new">http://www.anandtech.com/video/showdoc.html?i=1711</A>

    My OS features preemptive multitasking, a fully interactive command line, & support for 640K of RAM!
  6. Dang these forums are going slow tonight.

    My OS features preemptive multitasking, a fully interactive command line, & support for 640K of RAM!
  7. I know all about the internal and external speeds, but what are the physical differences between the P4s?

    I had a much better usertitle but was caught trying to hack me a better one so I got my current title as a punishment
  8. the wilimantee is .18 micron and has less cache

    but all of the northwoods are pretty much the same...they just have diffrent core revisions....which are basically small tweaks in the manufacturing process...


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