Re: Is it possible to watercool the cpu on a dell optiplex 790 motherboard? Dell bios does not let user overclock -k cpu such as i7-2600k in cpu.  Liquid cooling is usually for overclocking. if intention of liquid cooling is for quieter fan, or using 790 case for new components, you need power for liquid pump and radiator fan.  You could get liquid pump power off cpu fan header on Dell motherboard by using adapter (Dell 5 pin to standard 4 pin) so your pump 4 pin can plug in. 790 has small 80mm case fan and 80 mm cpu heatsink fan.  Most common radiator is 120 mm with matching size fan. Radiator typically mounted at back exhaust.  There are 80 mm radiator you can look into.  
Hi everyone,Is it possible to watercool the cpu on a dell optiplex 790 motherboard?
dell optiplex 790