Lol why do you have so much ram. 8 GB is like what you need for production its not going to help you any more, don't get 12. Spend that money on a decent graphics card, why are you thinking of some cheap budget stuff. You got a i7 Core and more then enough ram. Buy a GTS 250 or GTX 260 Core 216 if you don't have much cash.
Actually I don't even know what you are doing. Whats your PC specs, Motherboard, PSU etc.