25 branch pipe, although a large amount of water storage capacity, but this is not directly related to heat dissipation. Heat dissipation is only related to the temperature of the inlet and outlet water and the velocity of the water flow. 20 of the branch has become a basic standard, and the water pipe is small, fast water flow, heat corresponding increase in the so-called 25 competing products is just a gimmick to attract and mislead the consumer, and can not really achieve better cooling effect