Id suggest getting a new Processor. Try the i7 2600k. its about 250$ and it beats the i7 990x in many tests. not to mention the i7 990x is upwards of 800-100$. If you cant afford the 250% i7 2600k, look into the i5 2500, its competitive to the i7''s and its probably my second best suggestion towards a processor.
1.) i7 2600k
2.) i5 2500k
Also sandy bridge just released a new mother bored platform of p67 which "unlock" the gaming potential of the 2nd gen ( i3, i5, i7 that have 4 didgets IE 2600 ) to better you're gaming needs