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MCP35x Pump Connection? - Page 2

post #11 of 40
Molex is for power. It is getting power from Molex. So that's where voltage control should be on.
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post #12 of 40
Thread Starter 
Quote:
Originally Posted by Averwind View Post
Molex is for power. It is getting power from Molex. So that's where voltage control should be on.
Do you know what the other connector is for?
post #13 of 40
The other connector needs a motherboard 4 pin connector (Typically the CPU fan header) or a 4 pin PWM fan header connector from a fan controller that produces PWM pulses. PWM is sort of an on/off/on/off sequence that is at a high frequency and changes in length. 50% duty cycle would mean the pulse ration between on and off are equal, 80% would mean 80% of the time it is on, etc. It's very different than voltage, do not try to use voltage to control through this connector.

A normal fan controller or MB 3 pin header will not work because it can only control by voltage.

This connector is only needed if you want to slow the pump down via PWM control. Leaving it disconnected is perfectly fine, it will just operate at 100%.
Edited by Martinm210 - 2/15/11 at 6:48pm
    
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post #14 of 40
I'll post it again, in case you missed it =P

I don't think you can, the green wire sits on the offset side of the fan header. so it sits on the extra 4th pin seat 3+1 so its on that 1. but you can always modify typical 3 pin plug, just grind off the little knobby tab on new connector you are going to use
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post #15 of 40
Quote:
Originally Posted by Averwind View Post
Molex is for power. It is getting power from Molex. So that's where voltage control should be on.
lol what? no its not, the voltage control part
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post #16 of 40
The molex is for supplying power to the pump, the PWM connector is just the speed control piece (Doesn't draw much power at all). Since most motherboards don't supply 20 watts of power through a fan header, they purposely made this a molex connector so you wouldn't accidentally fry your motherboard fan channel.

Don't connect the molex to the motherboard unless you know it can handle upwards of 20 watts.
    
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post #17 of 40
Quote:
Originally Posted by xyeLz View Post
Do you know what the other connector is for?
It is for PWM control has nothing to do with powering up the pump.
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post #18 of 40
Thread Starter 
Sorry mekaw, didn't see your other post.

Okay well since I have 2 pumps, are there 2 areas on the motherboard where I would be able to control the PUMPS via BIOS?

Or is there any way I would be able to control BOTH pumps' speeds without the need for extra equipment?
post #19 of 40
well you could connect it to pwm chassis header but it's very likely that both of those will run at different speeds, I think 4pin chassis fan header is based on mobo temp, vs cpu is cpu temp.

unless they both run at similar temp it'll run at different speeds.... it's not bad to just keep it connected via molex only and run it at full speed. just make sure you use that foamy pad it came with to reduce vibration and noise.

but regardless, you can put it on cpu and chassis pwm header or whatever it is called and controll both of the speeds via Speedfan.
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post #20 of 40
Thread Starter 
Quote:
Originally Posted by mekaw View Post
well you could connect it to pwm chassis header but it's very likely that both of those will run at different speeds, I think 4pin chassis fan header is based on mobo temp, vs cpu is cpu temp.

unless they both run at similar temp it'll run at different speeds.... it's not bad to just keep it connected via molex only and run it at full speed. just make sure you use that foamy pad it came with to reduce vibration and noise.

but regardless, you can put it on cpu and chassis pwm header or whatever it is called and controll both of the speeds via Speedfan.
Ahh thanks.

Just as an FYI I don't have 2 loops. I have 2 pumps powering 1 loop. Most of the time they will probably both be running at 100%. I never really considered slowing them down but I would certainly like to have the option.

So basically the motherboard doesn't have 2 slots for me to plug in both pumps (and have it run at the same speed, etc.)???
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