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 02-25-2010, 06:52 AM   #1
Registered: Jan 2010
Posts: 63

Rep: Reputation: 15
Red face difference between i686 and X86_64 installation procedure

I have p4 with 512 mb ram,40 gb hard disk...i want to install linux from live cd..for this i have to download iso image..there are some options in the download i686 and X86_64 option...which one sould I download..i want to install desktop version..I want to know the differences also
Old 02-25-2010, 07:15 AM   #2
Senior Member
Registered: Oct 2004
Distribution: Fedora Core 4, 12, 13, 14, 15, 17
Posts: 2,279

Rep: Reputation: 250Reputation: 250Reputation: 250
Which P4 cpu is it ?

Which live cd is it ?
Have you got the cd yet ?

i686 is for 32 bit processors
x86_64 is for 64 bit processors

Have you got windows installed at the moment ?

If you have then download cpuz from

and install it.

Follow instructions from

Please don't post in bold writing, it doesn't make people answer faster.
Old 02-25-2010, 09:23 AM   #3
LQ Guru
Registered: Dec 2007
Distribution: Centos
Posts: 5,286

Rep: Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194Reputation: 1194
The i686 choice is at least OK and probably better.

If your CPU has x86_64 support then either i686 or x86_64 Linux will work. If your CPU lacks x86_64 support then only i686 will work.

If both work, 512MB is low enough that the disadvantages of x86_64 for small amounts of ram might be enough of a factor to affect the decision (but 512MB is not so low that it makes the choice of i686 clearly best). 40GB hard disk is also low enough to notice the extra disk space needs of x86_64 but not low enough to force the decision of i686.

It depends on what you will be running on the system and there won't ever be enough information to make a well supported decision. Assuming either would work, one will be slightly better than the other and you'll just need to guess which.

If you don't want to even figure out whether x86_64 would work, i686 is the safer choice.


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
Calculate Linux Desktop 9.9 i686/x86_64 released Lautre Calculate 6 11-05-2009 07:00 AM
i386-i586-i686-x86_64 Question Libertes Linux - General 3 09-09-2007 07:05 PM
i486, x86_64, i386, i686 linux4life88 Linux - General 5 03-18-2006 08:55 PM
difference between i386 and i686 bvav22 Linux - Hardware 3 05-11-2005 09:19 PM
Difference between i386 and i686 Kroenecker Linux - Newbie 7 05-19-2003 11:54 AM > Forums > Linux Forums > Linux - Newbie

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

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
Open Source Consulting | Domain Registration