Variable speed pump?

[mckrackin5324]

Most water cooling systems I have took the time to read the manual says to set the CPU fan header to 100%. The one that powers the pump.

 

What if I don't? What if I let it vary the pump speed by temps?

Will this damage the pump?

[Skiiwee29]

you will be fine running it with a PWM fan control. Its how I run my DDC from EK in my loop. 

[mckrackin5324]

1 minute ago, legacy99 said:

you will be fine running it with a PWM fan control. Its how I run my DDC from EK in my loop. 

Do you set it to 100% or to auto?

[Skiiwee29]

Just now, mckrackin5324 said:

Do you set it to 100% or to auto?

no I set a curve for it to ramp up based on temps of my CPU. 

[mckrackin5324]

Just now, legacy99 said:

no I set a curve for it to ramp up based on temps of my CPU. 

Thanks

[For Science!]

30 minutes ago, mckrackin5324 said:

Do you set it to 100% or to auto?

 

29 minutes ago, legacy99 said:

no I set a curve for it to ramp up based on temps of my CPU. 

It doesn't make so much sense to change the speed of the pump with cpu temps because pump speed does not affect the dissipation too much, its better to find a place that is audibly fine for you and leave it there at a fixed rpm that gives you a decent flow (people say 1 gpm, normally) This part is personal, but I find a change in noise (change in rpm) far more annoying than a constant whirr. Since the LAing pumps are sensitive to the water temperature (max rated temp of 65 degrees), it does however make sense to ramp the fans when the water creeps above 55C.

 

This regards to OPs original question, this instruction is usually true for 3-pin AIOs that expect a constant voltage supply (Asetek pumps), for 4-pin they are PWM controlled as legacy99 mentions.