Okay, so that leads me to believe that EITHER:
1. Bad Ultra-D to SLI mod? (but at POST it says nForce SLI)
2. Even though both cards have same bios force flash, maybe Gigabyte and Chaintech 6600gt won't work together?
3. I may have messed up my SLI connection on the cards by using my hand-made one.
Hmmm....
In any case, thank you SO MUCH, Krag. Also, how does the Gigabyte bridge compare to the DFI one... same scores, different?