It automatically changes the fps if you have a higher bandwidth... I can only get 25fps since I only have a 384kbps connection. My friend has 2mb connection and his is at 30 frames a sec. You can also increase the fps if you lower the quality a bit. Most of my family has ichat and an isight and I don't think anyone has a fps greater than 15 but since we just sit when we talk the pictures come in crystal clear.