Thanks for the quick reply. I'll have to look into that, but I'm a little skeptical about using adapters to power a card like that.
I used a molex adapter for...well I don't know. Whenever the 9600gt first came out until about 5-6 months ago without an issue. That's a good few years. Worked like a charm.
You should have nothing to fear.
Seconding the 6850.