I'm working on building my own computer.?

Those should be all compatible with each other, but I'm a bit confused by your choices, as those parts are pretty old (from 4+ years ago), and I didn't even think they make them anymore. Where are you buying them from? You should consider getting a system with a Core-i5/i7 processor and a Radeon 6000 series or Geforce GTX 5XX series video card instead.