So my wife needs a new pc and loves the LAN box style of the dorm 2.0 model, but for the games she likes to play (FPS like BF3), I'm worried that the HD 7770 might be a little underpowered. Is it feasible to use a HD 6870 in lieu of the 7770? The power supply should be able to handle it but I'm worried about the temperature under load in that tiny box. Any advice on this or direction to a place better suited to handle this sort of question?
Also, would the performance bump going from 8 gb of RAM to 16 be worth the 40 dollar price increase?
Thanks!