Few days ago I got Sapphire 5830 and while I was installing it I thought it's like my old card which takes only 1 6 pin connector, anyway this card takes too. I forgot to plug in the second connector, I turned on my PC and wow the card was very noisy and there was beep in the mother board. I tried few restarts without any luck "of course"
Anyway, I noticed that it comes with 2 6 pin connector convertors and figured it out. Now the card is working fine but the question is "Did you I do any damage to the card by forgetting to plug in the second 6 pin connector?"