Frequent ubuntu "freezes" after RAM upgrade

[arshad]

On Sat, 2009-12-26 at 20:20 +0100, Andrea Fortino wrote:
> > On Sat, 2009-12-26 at 19:55 +0100, Andrea Fortino wrote:
> >>  >> 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
> >>>
> 
> Andrea Fortino wrote:
> >> 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
> >>
> 
> arshad ha scritto:
> > is it something to do with 32bit and 64bit?
> > 
> 
> I think 32 bit systems allow up to a total of 4 GB... hey, wait a 
> minute: may be I should _resize_ swap partition (1GB instead of 1,5GB)??
> ..so total RAM would be 4GB (3GB RAM + 1 GB swap)!
> 
> May be it could be the solution?
> 
> Andrea
> 

isn't the recommended swap size is 2*ramsize?