Koolance continues with the traditional dual-pump configuration. Koolance rates the pumps at 1 liter/minute or 15.8 gph working at 2 watts. This offers not only increased head utilizing small inexpensive, pumps, but a back-up in case of pump failure. Add to that, three temperature sensors with programmable audio alarms and a automatic shut-off feature, the 720 is probably one of the safest choices for water cooling on the market.