Quote Originally Posted by DanL View Post
I think the whole 64-bit RAM thing is overblown. Unless you're already maxing out RAM or near it, I wouldn't worry about it. Running 64-bit Kubuntu (not an efficient distro or DE) with Kwin effects, Firefox, Tbird, and Synaptic open, I'm only using 800MB. It's much less on my main install (Debian sid/xfce). That said, I don't think I'd reinstall just to move to 64-bit unless I was doing something that really benefitted from it (running VM's, lots of encoding, big GIMP images, etc.).
Try rebooting less.
 ~ % free -m
             total       used       free     shared    buffers     cached
Mem:          7851       7234        616          0        416       3810
-/+ buffers/cache:       3007       4843
Swap:            0          0          0