So I've upgraded both my laptop and old desktop with more RAM. I thought that it would make a difference for both computers, but I never knew how much.
My boss at the studio gave me one of his old RAM chips to put in my laptop and I immediately noticed the difference, especially when I use photoshop to convert raw files into jpgs. Even for the rest of my daily use, it seems like the whole thing is running more smoothly.
For my desktop, I took a RAM chip from my parent's old computer that is having power supply issues. Well, it made a world of difference! I should have done it a long time ago. I don't have to wait nearly as long for anything anymore.
Don't skimp on RAM, it makes a huge difference.