For a somewhat reasonable amount, u can get a gtx 770, but people are saying the gtx 960 will be out soon. If not nvidia, a r9 265 or 270 is good
only reason i ask is because a guy local to me said i should be able to get 6+ GHz with the water loop i have and that sounds a bit high to me. says he gets 4.8 on a dual core on a loop smaller than mine
Even from 4-5ghz it will go from 40c to 80-90c. .