I'm starting to think 8 pin and 6 pin makes a difference with 3d core voltage but I'm not sure. Can someone with the XT BIOS on a 512MB card (the BIOS I directed you to use in my guide) post up a picture like the following with 2x 6 pin connected?

Here's mine on the regular ATi 512MB XT BIOS w/8 pin & 6 pin... CCC unlocked, clocks @ stock. (Click thumbs to enlarge)