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What is the difference between 32bit and 64 bit and which should I chose?

I installed Ubuntu Natty 64-bit on HP machine, with the following hardware:

  • AMD Phenom 8600 triple core processor
  • 3GB RAM
  • GeForce 6150SE nForce 430

But I feel that it's so slow compared with the same machine with Ubuntu Lucid 32-bit with PAE.

What do you recommend, install Natty 32-bit? Get back to Lucid or Maverick?

Some tip for speed up my machine? Should I install gnome?

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marked as duplicate by James Mar 6 '12 at 15:55

This question was marked as an exact duplicate of an existing question.

It's the same, and, it feels slow because of some COmpiz settings that slow down the machine, and you already have Gnome, Unity is Gnome, it's just a shell on top of it. – Uri Herrera Jun 18 '11 at 19:29
ok, but there is a way to get better performance? – raulricardo21 Jun 18 '11 at 20:03

Try installing preload and prelink. they are both in the default repositories. Check out this guide for prelinking:

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btw, this is for speeding up the machine. – Gothic_Day Jun 20 '11 at 2:42

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