Upgrade for 4870
Last year forum members helped my son and I build a great gaming computer for less than $650. For his birthday, he is asking for a better graphics card. The current card is an HD 4870. I have read you need to go at least three levels higher to see that much of a performance boost. My budget is probably $250 so I am not sure that is possible.
Also, we thought about picking up another 4870 and doing crossfire, but this card is pretty wide and I don't know if we can get another one on the current motherboard.