Welcome to the most active Linux Forum on the web.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 01-09-2011, 06:11 PM   #1
Registered: Oct 2008
Location: Latitude= 9.9722, Longitude= 76.378
Distribution: Open VZ,fedora & Centos
Posts: 47

Rep: Reputation: 0
i386 & i686


Can anyone let me know what exact difference between i386 and i686 architecture based machine.
Both suppose to be using 32 bit OS ?

Thank you
Old 01-09-2011, 06:20 PM   #2
Senior Member
Registered: May 2006
Location: USA
Distribution: Debian
Posts: 4,824

Rep: Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615Reputation: 615

Both are 32-bit. You don't have to care, and should go for the i686 version of whatever, unless you have an actual 80386 chip around.
Old 01-09-2011, 06:21 PM   #3
Senior Member
Registered: Jan 2006
Posts: 4,363

Rep: Reputation: 172Reputation: 172
The i686 has a lager set of instructions to draw from or the i686 has all the i386 instructions plus extras. All i686 computers will run i386 code just fine but the reverse is not true. A 386 or 486 will not be able to run code that was built for a 686.
Old 01-09-2011, 06:23 PM   #4
Senior Member
Registered: Oct 2009
Location: Wroclaw, Poland
Distribution: Arch, Kubuntu
Posts: 1,261

Rep: Reputation: 315Reputation: 315Reputation: 315Reputation: 315
Yes, there are 32 bit. I don't known all differences, mainly are instruction sets. You can get more info on every architecture from wikipedia.
Old 01-09-2011, 06:25 PM   #5
Registered: Oct 2010
Distribution: Ubuntu 10.04 , Linux Mint Debian Edition , Microsoft Windows 7
Posts: 390

Rep: Reputation: 50
if you are unsure about which architecture to use ,you can use i486 , but it will detect only one cpu if you have many cores.

i use i686 . it should work on computers made after 2000 i think ..


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
is it ok to use i386 rpm for i686 & how about src rpm amolgupta Linux - Software 4 05-01-2013 09:45 AM
[SOLVED] What's the difference between i386 & i686? catilley1092 Linux - Newbie 3 10-14-2009 12:01 AM
Help! Installed the i686 kernel & glibc packages instead of the i386 version penguin_powered Linux - Newbie 3 04-12-2004 12:45 AM
Are i386 & i686 rpm compatibles? smau Red Hat 1 03-07-2004 07:04 AM
is celeron 500 an i686 ? if so how to move from i386 to i686 raft Linux - Hardware 1 12-22-2003 07:58 AM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 10:08 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration