64bit on OLD laptop

[newtusmaximus]

My 2007 Fuji Si1520 ( See sig below)  I originally had running on LL 64 bit with 2 x 1 GB RAM.  However on resources, I found that I was staring to use well over 60% RAM  on many occasions..  I therefore bought a second hand 2GB stick off a well known second user  goods website and the laptop now flies. The extra 1GB helps, as video  card does eat some of the RAM memory.  So not sure what the maximum ram your laptop will tolerate, but go for it if you can source at a good price.  It will be a good investment.

NOTE http://mobilespecs.net/laptop/Fujitsu-Si..._1520.html

The above spec said maximum ram was 2x1 GB - HOWEVER, The laptop took 2 GB + 1GB... .  I had the latest bios which said 3GB Ram max.  By downgrading the bios ( retrograde ROM flashing) some users had managed to get 2 x 2GB RAM modules working but for me that step would have been risky and I did not buy a  further (second) 2GB Ran stick as I did not want to push my luck.
 
Suggest you try any user groups for your laptop to see if you can get any info on the BIOS for your machine  and what its maximum RAM it will tolerate.

Hope this helps.