Hey guys, can anyone tell me if I need to have both EZ_Plug 1 AND 2 plugged in for SLI GTX-580s and a RevoDrive X2? Will it damage the board if I have them both plugged in or if I DO NOT have them both in?

I currently have both 4 pin molex's plugged in along with both 4 pin CPU and the 24 pin using an AX1200. I just want to be sure I won't damage the RevoDrive or the GTX580s by giving them either too much or too little power.