Just building my new rig and have come to the Grx connection and the BFG 8800GTX requires 2 x 6 pin power connections on the gfx card. I have the Corsair 620W which has the two connections but I just wanted to check whether I just use one connection and use a splitter on the gfx end or I just run two PCI-e power cables straight from the psu. I'm sure its 2 straight from the PSU but what if I ever wanted to run in SLI mode, both power connections have been used up. Just a query.