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MCP355 PWM Control Evidence. Proof needed.

post #1 of 14
Thread Starter 
MCP355 missing wires for speed control. but I found out it is a free spot to solder a wire there please take a look and give me your opinion.

I had bought me a MCP35X2 Housing for my MCP355, but I already had the MCP355's doing nothing in shelf for couple of month's.

I was looking at the MCP35X2 Housing pump installation guide and o saw the MCP35x has 4 wires, two yellow,one black and one blue. but both of my pump only has three wires, yellow,black and blue. as you can see below



I have a free spot to solder another wire. the question is can I add another wire there? what wire goes there? If i solder another wire there is will work like the MCP35X pump?

The MCP35X use the same PCB as the MCP355 both are DDC 3.1



I found the lef pic at martinsliquidlab.org/ and I flipped the pic to make things easy. The MCP35X has a different color wire beside the yellow wire. if I solder this wire that I'll be able to control both of my pump to mobo header.

Left to right

1 - 12v - Yellow
2 - PWM control - Green in the first pic and grey in the second pic.
3 - RPM sensor - Blue
4 - Ground - Black






Fan header look below.


I had goggled all morning but i can't find anything that proves me that it will work and I was thinking if any of you know this mod.

PS: I don't want to spend money in pump speed control I just want things simple my mobo header or software.


MCP355 on Apogee with PWM control wire see the pic below. same pcb as the mcp35X and DDC 3.1 version.

source





Edited by skyn3t - 7/8/13 at 2:31pm
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post #2 of 14
Interesting! I don't know the answer, but you might have more chance if posted in water cooling section?
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post #3 of 14
Thread Starter 
Quote:
Originally Posted by WiSK View Post

Interesting! I don't know the answer, but you might have more chance if posted in water cooling section?
I already did but people there seems to ignore it. that's why I opened this thread.

I have the MCP3X2 and two MCP355, but before any move in soldering I need some input. thumb.gif
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post #4 of 14
Thread Starter 
anyone?
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post #5 of 14
Quote:
Originally Posted by skyn3t View Post

I already did but people there seems to ignore it. that's why I opened this thread.



yes in some one elses thread.People are trying to help you out as well.
http://www.overclock.net/t/1312726/possible-mcp355-pwm-mod/20#post_20364915
Bumping a thread less than 24hrs is not allowed.

Be patient someone will answer your question.
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post #6 of 14
Thread Starter 
ok
Edited by skyn3t - 7/9/13 at 7:07am
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post #7 of 14
Thread Starter 
My journey had ended with FAIL

I had soldered the wire last night for testing risking damage it but I had no success on PWM wire speed control as you can see below on this picture.



I fire up my pump's on my asrock z77 itx and went to bios HW Monitor to make the changes to low the pump speed but no change at all.I had tested level 1 to 9 restarted and I shutdown thed pc couple of times in hope to see any changes but nothing happen.
mobo used was asrock z77 itx and asrock z68 pro gen 3 I had tested level 1 to 9 with target and manual options. I think the free lead on this pcb is missing a PWM chip controller underneath ther pcb so this is why it did not work like I want too and many others. all wires check triple times it only catches the RPM.

Final thoughts the free lead on this pcb is dummy because is missing a PWM chip on it or disable somehow. I could not longer go farther because I had to hip off the pcb from the main coin and it will be like just destroying a pump.

The only option to lower the pump speed is using a Koolance CTR-SPD10 Pump Speed Controller 8-13V reviewed by Martinsliquidlab and mentioned in one of our chatting. thumb.gif and this little pump speed controller can handle two mcp350 at once smile.gif

Thanks to Martinsliquidlab to help me clarify this evidence and doubt's about lowering the mcp350/355 pump speed trough motherboard fan header and lowfat.


It did

Edited by skyn3t - 7/9/13 at 8:44am
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post #8 of 14
Not sure why it didn't work for you. It definitely worked for me.
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post #9 of 14
Thread Starter 
Quote:
Originally Posted by lowfat View Post

Not sure why it didn't work for you. It definitely worked for me.

maybe you had the mcp35x pcb. I did all the testing here with two different mobo and both pump's
Edited by skyn3t - 7/9/13 at 9:46am
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post #10 of 14
Quote:
Originally Posted by skyn3t View Post



maybe you had the mcp35x pcb. I did all the testing here with two different mobo and both pump's

You have other pwm devices working on those computers? Mine is a Koolance PMP-400 with a DDC3.1-PWM pcb. Koolance never sold a pwm capable ddc. I doubt there are different variations of the same pcb. If you really wanted to check you could pull the pcb completely and compare it to mine biggrin.gif. Pwm is still working on mine.
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