Control 12V pump using PWM splitter

[gliliumho]

Hi, so my planned water-cooling setup is to have

• 360mm radiator at the top (using PWM fans)
• 480mm radiator at the bottom (using PWM fans)
• pump at bottom beside the 480mm radiator

 

I was planning to hook up my pump to the splitter(link) controlling 480mm radiator but it's a 12V pump (meaning voltage controlled). 

 

Will it be possible to control the pump by hooking it up to the PWM splitter?? Or do I have to dedicate a fan pin on my motherboard to control it (not preferred since all my fan pins are near top of motherboard)??

[Ghost]

There are PWM pumps out there. There is no other way to control the speed of your pump automatically.

 

Most of the time, if you can there is a dial on the side of the pump.

[gliliumho]

Problem is, I already have the pump. It has a molex pin for power and 3pin for voltage control. I don't wanna buy another pump. Can I use cable extenders like this to hook up the the pump to my motherboard? 

[Ghost]

Problem is, I already have the pump. It has a molex pin for power and 3pin for voltage control. I don't wanna buy another pump. Can I use cable extenders like this to hook up the the pump to my motherboard? 

The 3 pin is not for voltage control. It's an RPM wire to plug into your CPU header. It's there so you can tell if your pump is running so your PC can power down if your pump eve fails.

[gliliumho]

So that means I don't have to plug that into my motherboard? I'm kinda new to watercooling so is it okay not to plug it in?
 

Just to provide a bit more information, the pump I'm got is the Swiftech MCP655-B.