The only parts I'm not sure about right now are the power supply, case and motherboard. I'm also slightly concerned about compatibility seeing as this is my first build. Assistance there would be helpful too.
@ the OP. Your build has no balance. It's going to struggle in every game you play unless you stick to mine craft and D3. You sunk a bunch of money into that case, motherboard meant for dual vid cards and hard core over clocking, and you shorted yourself big time where you need it...the video card. The 550 ti is a low budget card meant for sub $500 builds.