doesn't matter if idle computer use 60 or some more even if it s 100w so it still 92w per pci slot the gpu use
a 460 with no pcie power connector (IE only draws from the slot) that draws over 90 watts is so far out of spec for the card its crazy. card is rated for 75 watts max as its made to plug into a 16x slot thats only rated for 75 watts per pcie spec.
what does gpuz say its drawing? it will only show the gpu chip power usage not ram and other circuitry on the card but im curious as to what it says.
did you mod the bios power settings?