Lamar249 :
Intel core i5-3570
8gb ram
r9 280
Samsung 850 evo 250gb
Western digital HDD 500gb
asrock z77 extreme3
lightscribe optical drive
http://pcpartpicker.com/p/6npX7P I put most of the things you have listed here (excluding your RAM because of not having a name and your optical drive since it didn't show up on the database) but it ranged around 133w-582w (including the 2-way crossfire). Now while this isn't always the most accurate thing, with your PSU, you have loads of room if it does end up being a little higher than what it says. I'd go for it!