Ubuntu 13 October release and 64-bit Ubuntu release for Intel processors

[Rajendra]

Ubuntu 13 October release - Saucy Salamander is available. 

My question is on 64-bit Ubuntu image for Intel processors. 

Why do they (always) say this in release page? -  If you have a non-64-bit processor made by AMD, or if you need full support for 32-bit code, use the Intel x86 images instead.

Pangolin/Quetzal/Ringtail/Salamander - none of them have a separate 64-bit Ubuntu image for Intel processors. Don't they develop it? or they have issues in porting? 

[Chinmay Rajhans]

Not sure what exactly you want to ask.

I think the OS is designed for all the processor families.

Only thing you need to choose is 32 bit or 64 bit.

Other than that, I do not know if some such dissemination among processors exists.

Kindly elaborate a little more.

You may download Desktop editions of Ubuntu 12.04.3 or Ubuntu 13.10, 32 or 64 bit OS from here.

http://www.ubuntu.com/download/desktop

TY. CR.

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[Pratyush Nalam]

Amd64 is also for Intel's 64 bit processors.

Pratyush Nalam
http://www.cse.iitb.ac.in/~pratnala

On Fri, Oct 18, 2013 at 1:19 PM, Rajendra <rajendra....@gmail.com> wrote:

[Dilawar Singh]

>> My question is on 64-bit Ubuntu image for Intel processors.

It is the one that is called "64-bit PC (AMD64) desktop image. Its a confusing
name. 64 bit was AMD thingy and they did it before intel did the same. AMD64
only says "for processor with 64bit wide registers" and nothing more.

64 bit processor has 64 bit wide internal registers; it can, therefore, address
2^64 -1 addresses in memory which is quite large compared to 32 bit (approx 4GB
RAM). To overcome this, they use PAE. So don't pick non-pae version if you have
large RAM on 32 bit machine. So 64 bit processor makes accessing large memory
slightly better. You dont have to manage Physical Address Extension (PAE) (page
tables).

Some people with practical mind are more concerned about the size of data-bus
rather than the size of registers. Even 64 bit processors has data-bus no more
than 48bit (that still quite a lot of memory).


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Dilawar
NCBS Bangalore
EE, IIT Bombay