PC Build Help

[LunarHam]

Hey guys this is my first time posting so please don't judge the post if its wrong
So im building my first Gaming PC and i think I've got everything down ( i think)
This is what i have so far....
Corsair Carbide Series 400R Graphite grey and black ATX Mid Tower Gaming Case
AMD FX-8320 Vishera 3.5GHz (4.0GHz Turbo) Socket AM3+ 125W Eight-Core Desktop Processor
CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model
Gelid Solutions Icy Vision VGA Cooler GC-VGA02-01
ASUS SABERTOOTH 990FX R2.0 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
The whole thing comes out to $584.45 and my budget it no more than $750
So my question guys is do i need anything else for this computer i know i need a graphics card and hard drive but idk which to get in either i want a terabyte
of memory and as for the graphics card i wanna be able to play games like Battlefield 4, skyrim , Fallout:new vegas , crysis 3, etc on the highest possible quality i can get for my money.
So please guys i know you are experts and i'm not even close to your knowledge on these things but please help a poor kid game like a real man....
Thanks guys oh.. P.S if you guys can get me better deals on things and things to swap out please i encourage all the critiquing i can get.

 

[LunarHam]

Ditch the mobo with something cheaper like asrock extreme 4 for example and get r9 280x or gtx 770 and here you go ultra settings for games

Ok if thats what you think is good ill do it just one question because like i said i dont know anything what motherboard exactly do i get because there are so many models