price shows 69.99 for 750 that you linked earlier on amazon - sold by circuit city
The 760 is open air? Usually oem cards are blowers
Are the 6/8 pin connectors plugged into the card?
the old card would need 2x 6 pin connectors.
The new card might need either 1x 6pin and 1x 8pin or 2x8pin.
A little high on fan speed for that temp, but we figured you would want a little extra ventilation coming from that side panel vent anyway. Congrats on the card and glad the performance is meeting your expectations