hold up, that card on the left has two extenders between the motherboard and the card - that works ok?
Valid question. I'd also like to know!
Yup, it works. Two of my rigs need the leftmost card requiring two extenders, since the CPU gets in the way.
I just use an x1-x1 from the logic board, then an x1-x16 into the graphics card. Don't need Molex augmentation so far, though I don't put my most power hungry cards on these daisychained extenders.