Forgive my ignorance, I've only had the last two years to learn about this stuff. What I want to know is if i bought more RAM for my 64bit Windows7 PC, would my applications and games use the extra memory or would it just sit there until things caught up with it? I have 4GB of DDR2 in my GA-EP45-UD3P mobo right now and am not necessarily looking to upgrade for more RAM, I'm just curious, for future reference.