so i messed up but i dont know how the card was killed.

basically i powered the pc on but couldnt hear the pump so i unplugged the ATX cable and shorted the gree+black wires to trip the PSU. but i forgot to unplug the 2 pci-e power cables from the GTX. pump worked fine so i undid the short circuit.when i plugged everything back in i get a high pitched squeek that lasts maybe a half second then nothing. tried replacing the GTX with my 7900gs and the system runs fine so definitely must be the card. tried pulling the cables and using 2 different pci-e power cables(tried adaptors rather than the PSU's ones). still the same.
hopefully XFX will RMA it.

would you expect this to kill a gfx card, getting power from the PSU?