Corsair H50: Slowing Pump Down

Rok · 1 May 2010 at 11:54

As it has been suggested on here, slowing the H50 pump could aid in reducing the CPU temperature. I have a Zalman Fanmate spare and I was wondering if I plugged the pump to the board via the Fanmate would that do the job? If not could anyone suggest a better method.

gurusan · 1 May 2010 at 12:15

how would slowing the pump reduce cpu temp? :confused:

Jokester · 1 May 2010 at 12:17

Reduces heat dump from the pump presumably, any idea what wattage the pump is? Don't think it'll be sufficiently high enough to warrant doing.

gurusan · 1 May 2010 at 12:20

Probably 10W or so which is insignificant to the heat the CPU is dumping out...and you want all the flow you can get to move that heat away as quickly as possible.

Rok · 1 May 2010 at 12:50

Thanks for quick replys. I think I will scrap this idea.

ard-tullaich · 2 May 2010 at 00:21

If the flow was slower would it not transfer more heat to the coolant. Same principle with cars .

shotgun · 2 May 2010 at 09:04

I thought H50’s pump is connected to the motherboards cpu fan socket, which is PWM controlled, so the motherboard would speed up or slow down the pump accordingly?

Ovr · 2 May 2010 at 10:50

Well essentially if the flow rate is too high (read: higher than optimum efficency) then the rad will not be getting rid of the heat in the water as much as it could be, thus lowering the pump speed would lower the CPU temperature.

Jokester · 2 May 2010 at 10:57

Ovr said:
Well essentially if the flow rate is too high (read: higher than optimum efficency) then the rad will not be getting rid of the heat in the water as much as it could be, thus lowering the pump speed would lower the CPU temperature.

Increasing flowrate decreases temperatures, due to turbulent flow in the CPU block allowing the moving water to get as close to the block surface as possible. Otherwise you have static water at the block walls that acts as just another thermal insulator. Same applies for the radiator.

In reality once you exceed 1gpm (if I remember correctly) the difference increased flow makes is generally less than 1C.

gurusan · 2 May 2010 at 11:23

Ovr said:
Well essentially if the flow rate is too high (read: higher than optimum efficency) then the rad will not be getting rid of the heat in the water as much as it could be, thus lowering the pump speed would lower the CPU temperature.

no

Ovr · 2 May 2010 at 19:54

Lol @ Jokester. Yes, lets get into in-depth thermofluids when you're talking about such tiny pipe diameters and flow rates

The level of sheer arrogance on this forum blows my mind, hence my low post count.

Matthew Evans, PHD in ThermoFluids.

Jokester · 2 May 2010 at 20:34

Ovr said:
Lol @ Jokester. Yes, lets get into in-depth thermofluids when you're talking about such tiny pipe diameters and flow rates

The level of sheer arrogance on this forum blows my mind, hence my low post count.

Matthew Evans, PHD in ThermoFluids.

So why get it wrong then?