For whatever reason possessed me, I just maxed out the RAM in my 2005 PowerBook 1.67. Cost me 11 bucks plus shipping to take it from 1 gig to 2 gig. I think it currently holds the title of longest-surviving computer I’ve owned.
Hell, if you're still getting use out of it, why NOT max out the ram for that kind of price.
@anthracite Exactly! It runs my Nikon scanners that never had the software updated for intel.