Hi I would like to know how to adjust the pump speed (RPM) of my NEPTON 240M ? Actually the pump is connected on the CPU Opt port (Motherboard Gigabyte Z97X-gaming5), and the CPU OPT fan speed control is "full speed" on the bios . The CPU OPT fan speed control offered me several choices : Nomal / Silent / Manual / Full Speed My question is : should i keep the "full speed" setting ? Is it good for the life span of my pump ? My CPU's temperature is about 25Â° C so it works fine . Is it a good choice to let the pump turning in max power all time ? Thanks for your answers . Best regards .