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Old 06-12-2005, 09:11 PM   #1
fatrandy13
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pentium 4, i686 or i586


hi, i have a pentium 4 2.8 ghz processor with hyperthreading. i was just wondering how to tell whether it is an i686 or an i586. it's a dell dimension 4600. thanks
 
Old 06-12-2005, 09:23 PM   #2
musicman_ace
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Its an i686. The 586 was the Pentium Pro if I remember correctly.
 
Old 06-13-2005, 04:09 AM   #3
Electro
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No, Pentium 4 is an i786 or an 80786 to be more precise. It can run instruction models down to 80386. As with all Intel processors, they get a performance penatly when not running its own instruction model. AMD processors does not have this flaw.

A Pentium Pro is an i686.
 
Old 06-13-2005, 06:45 AM   #4
fatrandy13
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oh thanks
 
Old 06-13-2005, 01:21 PM   #5
liquidtenmilion
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anything pre pentium PRO(including Pentium MMX) is a 586(486,386).

Everything after pentium PRO is a 686(pentium 2, 3, 4, athlon k7, such as XP, duron and sempron). Pentium 4 is 686 too, as i786 doesn't even exist, and even if it did, GCC can't compile code optimized for this "i786"
 
Old 06-13-2005, 06:38 PM   #6
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A i786 does exist. Its a Pentium 4. GCC has option for march. Just specify pentium4. Also the kernel has it too.
 
  


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