[CentOS] How to know it's i586?

Tue Apr 11 18:31:18 UTC 2006
Kai Schaetzl <maillists at conactive.com>

I plan to install CentOS 4.3 on some older IBM Netfinity which have 
Pentium III chips. I see that there is now a i586 pxeboot image for 4.3, I 
think that's new. Can I use that for Pentium III?