Hey guys i was wondering. I have an opportunity to get another 6870 for $70 to crossfire. Should I invest that $70 for a crossfire or just spend the extra money on to upgrade to a single stronger gpu. I know that the 6870 draws a lot of power and expend more heat than the current cards. But for for $70 do you think its worth it? Also it would also benefit as a backup gpu(even though either way ill have a backup gpu lol).