I had a 5970 and 5870 I ran in tri-fire for awhile. If I had put those towards bitcoin mining 24/7 for a year I would own half of Peru right now. Back bitcoin prices were so low that it barely covered the power costs each month. The little bit I made in bitcoin I just sold off for American Dollars to buy more pc parts, not the best investment.I had 2 6970's.
Every single reference card (remember when we called it reference?) was custom.
They all had to have the power connector slightly shaved to miss the fan.