64-bit Questions

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64-bit Questions

Postby proxima_centauri on Tue Mar 18, 2008 1:03 pm

Hey all, I've been researching the whole 32-bit vs. 64-bit processors and OS's. I'm still confused on a couple of points.
Alot of places seem to make reference to specific AMD-64 processors, and I think if I had an Intel Core duo 2 T9300 for instance, that it is capable of 64 bit OS no? so would any 64bit distro that runs on AMD-64 also run on the Intel?
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Re: 64-bit Questions

Postby rustyman99 on Tue Mar 18, 2008 1:28 pm

64 bit/32 bit Linux runs on any x86_64 processor, either AMD or Intel
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Re: 64-bit Questions

Postby muskratmx on Tue Mar 18, 2008 3:16 pm

64 bit/32 bit Linux runs on any x86_64 processor, either AMD or Intel


That is true, but there is a difference between AMD and Intel. A distro that has an .iso labeled for AMD and another normal one, will have differences in them. The differences is in compilations and Flags and all that good S**T. In the past there was a lot of differences between the processors, But as they grow more alike, there is less difference between the software compliled on each system.

If the Distro of your choice has both amd and normal isos, you'd be adviced to choice the one correct for your hardware.

You said you researching 32bit via 64bit!

The software developement moves at a very fast pace. But about 1 year ago, my dad bought a 64 bit system to do vidio editing, at that time. Even though the kernel and most the 64bit distro was 64bit, the software he needed was 32 bit still, and so he had 32bit software doing his editing still. True he had a fast a machine, but as of 1 year ago, there was little advantage for him to have 64 bit. Each persons needs determine wither or not it's worth it.
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Re: 64-bit Questions

Postby proxima_centauri on Tue Mar 18, 2008 7:02 pm

Thanks guys :)
I think that answers my question(s), I'm soon getting a laptop and I'm installing 2x2gb RAM so I want to try and make the most out of it with an optimized linux distro.
So there wouldn't be any performance loss operating 32bit programs/libraries in a 64bit OS vs. a 32bit OS?
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Re: 64-bit Questions

Postby rustyman99 on Tue Mar 18, 2008 9:38 pm

It mainly depends on whether apps are built using multilib support, if they are then they're not 64bit optimized.
As far as I can tell, that's where any penalty will occur, which will be minimal, although a lot of people say 32bit apps actually run faster..

I'm biased on this front as I run Arch i686 at home but check this Arch 64 review out.

Arch's philosphy is simple, only optimized apps make it to the repo's, they don't want multilibs.
If you want a system that's bleeding edge (but stable), blindingly fast, only 64bit optimized repo's and can follow a wiki guide then Arch64 will be your distro-hopper-show-stopper :wink:
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Re: 64-bit Questions

Postby proxima_centauri on Wed Mar 19, 2008 8:41 am

Thanks for the link rusty, I'll give arch a try when my lappy comes in. :)
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