Help with cooling!

[Iglesias]

The pump requires a 3 pin male motherboard header.
I was wondering if I could connect it to a 4 pin male motherboard header, instead of a 3.

And the fan that it came with is a 4 pin female, can I connect that to a 3 pin male instead? I want it on a fan controller

 

[adycopilu]

The pump requires a 3 pin male motherboard header.
I was wondering if I could connect it to a 4 pin male motherboard header, instead of a 3.

And the fan that it came with is a 4 pin female, can I connect that to a 3 pin male instead? I want it on a fan controller

3 pin connector of fan/pump can be safely connected to a 4 pin male motherboard header. The 4-th (additional) pin provides PWM control over the speed of the fan. Without this, the fan will simply spin at maximum speed. There are some motherboards which can control the speed of the fan by varying the voltage on the 1st pin and don't require the 4th pin, but that's another story.

Also, you can connect the 4 pin female of the fan to the 3 pin male connector. Again, that fan will not be controlled in speed and it will run at full speed.

 

[Iglesias]

The pump requires a 3 pin male motherboard header.
I was wondering if I could connect it to a 4 pin male motherboard header, instead of a 3.

And the fan that it came with is a 4 pin female, can I connect that to a 3 pin male instead? I want it on a fan controller

3 pin connector of fan/pump can be safely connected to a 4 pin male motherboard header. The 4-th (additional) pin provides PWM control over the speed of the fan. Without this, the fan will simply spin at maximum speed. There are some motherboards which can control the speed of the fan by varying the voltage on the 1st pin and don't require the 4th pin, but that's another story.

Also, you can connect the 4 pin female of the fan to the 3 pin male connector. Again, that fan will not be controlled in speed and it will run at full speed.

So, if I plug my pump (3 female) into the 4 male connector on my motherboard, the pump will run at full speed?

 

[adycopilu]

most likely, yes.
it is also possible that your motherboard can control via both voltage and pwn on the same fan header (but that's a rare case and it happens mostly for CPU fan headers). for such headers, motherboard will detect whether you connected a 3-pin or 4-pin fan and will try to control via PWM (if available) or, if PWM is not available, by voltage.