re: What is the best way to upgrade a pc (hardware)

I had a shitty power supply that broke on me one day, it was the most likely cause of my RAM failing issues. One day it stopped working, bought a modular Corsair PSU haven't had an issue yet. More RAM installed will draw more power, if you have any issues with you power supply I would replace that as well. Seems like the best choice as long as you don't want to get a solid state drive for your OS and most used programs.