Currently have a 6850 GPU but my mother board supports both cf and sli what card should i go with considering down the road Ill get the second card for it. Currently the 6850 is performing poorly lots of blotches and overheats on me not sure why but just considering taking it back. Its under a 2 year protection plan so I want something better than the 6850. Note: the 6850 was crossfired but my kid has the other one now so i have been playing on a single card.