Welcome to Nikonians! Go into the Shooting Menu (Camera Icon) > NEF (RAW) recording > NEF (RAW) bit depth 14-bit (Limits the Maximum FPS rate to 2.5FPS) and change it to 12-bit (Allows Maximum 8FPS rate). The Shutter Speed must be set to 1/250th sec. or higher. To get faster than 6FPS you must be using AA batteries or an EN-EL4(a) battery pack. Good Luck and Enjoy your Nikons!