Also most cards advertise read rates and that has no effect on shooting. Find the write rate. That is how fast the card can be written to. But Woody is correct, it will not increase the burst rate, only the number of shots before the buffer fills and the camera slows down. ON my D750 finding a faster Write rate SD card carried my number of shots up for about 15 RAW files till slow down to about 45 shots. If carried my JPG rate to be able to hit 100 before it slowed down.