I have a Dell 1545 which was originally 2 GB of Memory. I have replaced it with a 4GB +2GB Non Dell Memory. It works fine even though Dell claims the max memory is 4GB. The only Issue I am having is that I get an Insufficient Memory Notice and often have to re-boot. Funny, I was getting this even with the factory installed memory. My 6 GB does speed things up but still need to get the insufficient message to stop. Suggestions I am a banker not a geek