ram is extremely overkill and so is the cpu. You may not need the thermal paste if the cpu's heat sink comes with some. Also I noticed you didn't have a case. I would recommend getting a case since you have never built a computer before. Go with antec Ive always loved their cases. You can also skimp on the dvd drive is you want just install from a usb device.
The 5830 usually takes two slots - and you want to integrate 4 on that board? Using the last slot for the fourth card would mean to obstruct a lot of ports according to the pic of that board.
I have this board and it works fine with 4 5830's