I'm going to be buying 4 gigs of DDR3 RAM. I don't think I can run 5 so I'll just remove the single gig of RAM that I have in now.
How can I tell if my motherboard will support DDR3 RAM? I ran CPU-Z and have a report made.
crucial provides a memory finding tool which should do it for you http://www.crucial.com/
Look at the physical form factor: DDR2 and DDR3 have a different pin count as well as a different notch position.