Athlon 64 was the processor which introduced the amd64 instruction set,
so you should be able to run that if you want. If you're willing to
re-install, you might as well go with wheezy at this point.
Anyway, with a 4GB system you have to ask yourself whether you really
need that extra 10-12% of memory: does your system swap currently?
64 bits binaries tend to run a little faster yet use a little more
memory (bigger words and pointers), so with a mere 4GB the gain is not
huge. If I were you, I'd either let the system as is (specially if it
runs comfortably under 3.5GB anyway), or parhaps try the PAE kernel
available from backports (currently 3.2+46~bpo60+1, so fairly similar
to the one wheezy uses).
FWIW, I have an Athlon 64 3500+ system which runs fine with the
2.6.36 PAE kernel from mepis11 (a squeeze variant).
Gábor Hársfalvi wrote, On 2013-04-04 13:21:
Dear Users,
I installed 4GByte RAM in my motherboard succesfully. In BIOS I see all
the 4096MByte, but after booting Squeeze it show me 3,5GByte. I know I
should install the kernel with PAE - so I
installed linux-image-2.6.32-5-686-bigmem package and restart computer.
After it I choose this new kernel from GRUB. After loading it stuck with
black screen with blanking cursor on the top left side of the screen.
What should I do?
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