Frequent ubuntu "freezes" after RAM upgrade

[arshad]

On Sat, 2009-12-26 at 19:55 +0100, Andrea Fortino wrote:
> > On Sat, 26 Dec 2009, Andrea Fortino wrote:
>  >> Date: Sat, 26 Dec 2009 19:27:41 +0100
>  >> From: Andrea Fortino <andreas.fortino at gmail.com>
>  >> To: ubuntu-users at lists.ubuntu.com
>  >> Subject: Frequent ubuntu "freezes" after RAM upgrade
>  >>
>  >> Hi,
> <SNIP>
>  >>
>  >> BIOS can read all of 3 GB, but ubuntu often "freezes" after some minutes
>  >> of work. So I try ubuntu memory test (option from GRUB menu). Test #5
>  >> ("block move, 64 moves") reports numerous errors. Retried memory test,
>  >> with only 2 GB (checked every possible combination of 3 blocks): no
>  >> errors found.
> <SNIP>
>  >>
>  >> Ciao,
>  >> Andrea
>  >>
> 
> 
> accessys at smart.net ha scritto:
> > have you tried removing one of the card s and seeing how it ran with 2gb 
> > rather than 3gb??
> > 
> > Bob
> > 
> 
> Yes, thank you, now I'm running with 2x1GB, but I often use virtual 
> machines so 3 GB would be much better.
> 
> I thought maybe something wrong with one of the 3 RAM slot of the 
> motherboard, but I checked all of them: they works. Problem should be 
> software, but I can't find where.
> 
> Andrea
> 

is it something to do with 32bit and 64bit?