ok, let's see if i got this correctly . The card draws more power from the PCI-E port which delivers 75W than the 6 pin power rail. If the motherboard is older or a entrance-level, the card will cause power issues, demanding more than PCI-e port can feed it. Correct? If this is the case, it can be fixed by a revision, or AIB version with 8 pin connector and a tweaked BIOS who limit or adjust to the PCI-E power compliance.