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How to connect 2 or more MCP35x to motherboard?

post #1 of 11
Thread Starter 
Hi guys,

As we know, most (perhaps all) of the motherboards have only one 4-pin PWM fan connector.

I have to note here. A few MBs such as Rampage 3 Extreme/Formula/Black Edition have eight 4-pin PWM connectors. However, only the one which is CPU fan connector is able to be set the Duty Cycle (10%, 20%, ..., 100%) manually in BIOS.

So, the problem is if I want to fully control the pump speed of 4 "MCP35x"s, what and how should I do?

Thank you!
post #2 of 11
a pwm splitter or 2?

watch it that might not let you push them to 100%
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by somebadlemonade View Post
a pwm splitter or 2?

watch it that might not let you push them to 100%
A 1-2 PWM fan cable splitter doesn't work. I tried PWM fan cable splitter, but only one pump could be controlled, and the other one ran on 100% all the time.

I don't know the reason, but I guess this is not like a fan cable splitter. A fan cable splitter is simple.
Edited by rogfans - 10/10/11 at 11:33pm
post #4 of 11
how are you using the pwm splitter?
you just need it for the pwm signal, i'm guessing the rpm and pwm signal wires got mixed on the other connector
it happens sometimes
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post #5 of 11
I use a 4 pin splitter cable for my pumps without problem. As mentioned above the cable may be faulty or the connector on the pump isn't making good contact.
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post #6 of 11
You could alternatively just connect them to a fan controller, but that is different from what you're looking for.
    
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by Big Elf View Post
I use a 4 pin splitter cable for my pumps without problem. As mentioned above the cable may be faulty or the connector on the pump isn't making good contact.
Quote:
Originally Posted by somebadlemonade View Post
how are you using the pwm splitter?
you just need it for the pwm signal, i'm guessing the rpm and pwm signal wires got mixed on the other connector
it happens sometimes

I used this one. Sth wrong with it?



post #8 of 11
You wouldn't be able to see whether the pins have been wired the wrong way round on the connector due to the sleeving. Can you try another one?

The pins on the pump's PWM cable are poor quality and are easily displaced so it's worth checking that they make good contact.
Black Noise
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i7 990X Asus Rampage III Extreme EVGA 980Ti EVGA 980Ti 
RAMHard DriveHard DriveHard Drive
24GB Corsair Dominator GT PC3-16000 Samsung 850 EVO Crucial CT750MX300 Seagate Momentus 2TB 
Hard DriveOptical DriveCoolingCooling
Seagate Momentus 2TB Sony Optiarc AD-7690H Slimline DVD-RW Blocks - EK Supremacy, 2 x EK FC-Titan X, EK FC... Radiators - 2 x Black Ice SR1 480, 2 x Black Ic... 
CoolingCoolingCoolingOS
Pumps - Swiftech 35X2 x 2 & Heatsinks Reservoir - EK Multioption X2 400 Advanced Fans - 20 x Noiseblocker PL2 Windows 7 Pro 64-bit 
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Hard DriveOptical DriveCoolingCooling
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CoolingCoolingCoolingOS
Pumps - Swiftech 35X2 x 2 & Heatsinks Reservoir - EK Multioption X2 400 Advanced Fans - 20 x Noiseblocker PL2 Windows 7 Pro 64-bit 
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by Big Elf View Post
You wouldn't be able to see whether the pins have been wired the wrong way round on the connector due to the sleeving. Can you try another one?

The pins on the pump's PWM cable are poor quality and are easily displaced so it's worth checking that they make good contact.
Thx man. I just ordered a different cable from Newegg. Hope this will work.
post #10 of 11
Thread Starter 
Ohhhh my God!! It WORKS!!!!!!!!
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