In your case get this card
http://www.newegg.com/Product/Product.aspx?SID=mVN_Zk8iEeK_TubHJGciMAEXO5_k72N3_sBL_0_0&AID=10440897&PID=1225267&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-cables-_-na-_-na&Item=N82E16814130827
comes free with Assassins Creed 3 as well. Should be good enough for what you want to do.
DO you have a microcenter near you? That have some excellent deals for processors
example: i3 3225 processor $119.99 + $40 off any mobo.