Please help, first PC build, liquid cooler sounds like it is going to takeoff

xxxlun4icexxx

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Jun 13, 2013
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Hello all,

I have to two questions for you on my first P.C. build that I need some help with.

I put everything together yesterday and to my amazement it actually booted up successfully. It was a great feeling. However, I have 2 issues.

#1
I am utilizing my liquid cooler from my alienware aurora pc (only part I reused from it). When I put it on the new motherboard I noticed something. The cooler has 2 plugs. One is the standard cpu fan plug which fits nicely into the motherboard. However, my cooler has a small second 7 socket plug (only 4 wires though, wires in the 1st, 2nd, 3rd, and 5th slot). This was marked as the "CPU Pump" on my alienware motherboard. I read that this is a proprietary thing so you cannot use the coolers on other motherboards. However, I also read posts from people saying that you actually do not need to plug that one in. All that would happen is that you may receive a warning that the cooler isn't working properly. All of that being said, when I booted up my P.C. for the first time, for the first 2-3 seconds after pressing the power button, the fan acts normal, but then it revs up and I have never heard a fan get as loud as this. It must be running at like 5,000%. Does anyone have any advice on this? Or do I just have to kind of bite the bullet and get a different cooler?
Also, it may be worth pointing out I really was only on the P.C. for 10 minutes before I turned it off for the night. Not sure if it would have eventually calmed down or something.



#2 I have a corsair 500R case. There are a bunch of cables which are coming out of the front ports that they wrapped up nicely for me (the standard audio, usb, lights, etc.) however there was one cable that I did not know what it was. The plug on the end had 2 sides. One side was a female 4 pin plug, and the other side was a male 4 pin plug. It looked almost exactly the same as a molex cable, however when I tried to connect a molex cable from the power supply to it, I really had to force it to get in there. I kind of figured that meant it was the wrong one so I unhooked them. I then found that there was a 3rd power spot on my motherboard. There was a 24pin, an 8 pin (both of which I already connected to power), and then an empty 4 pin. I actually just ended up plugging the cable from the front into that. Is that correct? Or should that be going somewhere different?

FYI my motherboard is an MSI X79A-GD45 PLUS 2011 RT

Any advice (Especially on the first problem) would be greatly appreciated. I want to use my P.C. but I do not want my cooling unit to explode.
 

Xavier Bouttier

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Sep 10, 2013
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Dude dude dude.....

That molex cable coming from the front.. is the proprietary connector for the front panel fan controller (a little tab you can push up/down 3 different positions on the 500R). It is meant to connect to the side pannel 200mm fan, and the dual front 120mm fans. + a standard molex cable which connects to the psu for power to the 3 fans.

Secondly, regarding your liquid cooler, do NOT turn on your pc without having plugged in BOTH of those 3pin/4pin connectors! One is for the fans mounted on the radiator, and the other is for the pump located on the CPU block. If you didnt plug in the pump connector, the reason your fans were going bananas, is because your CPU was overheating due to no liquid moving around in the cooler.

EDIT 1: if you did plug both in, and your fans are still going bananas, it means that the plug which has that one cable which transmits the signal for fan speed control, was proprietary to your alienware, and will only run at full RPM on another rig (this is a ballpark guess)
 

atmos929

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Regarding your trouble connecting the molex connector... that's fine and almost expected... molex connectors are sometimes tricky, the male and female pins sometimes bend a little bit, making the connection a bit hard, but it's ok.
 

atmos929

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Thye 4 pin molex connector in your MoBo is probably an auxiliar for e-sata or for PCI-e... you are supposed to connect a molex from your PSU there... not the molex adapter for the case fans.

dude, you really need to get the MoBo installation manual and the Case Manual when doing that... it is not hard. :)
 

xxxlun4icexxx

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Jun 13, 2013
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I guess I have to go buy a new cooler than because as far as I know there isn't an adapter cable for that pump plug. Sucks that they had to make it like that...

I had my p.c. on for 10 minutes or so. Geez, I hope I didn't destroy the freaking cpu. That's what I get for taking some random forum post for truth.

Anyways thanks guys. I'll get the molex cable issue sorted out too. Turns out my first build i guess didn't go as well as i planned.
 

xxxlun4icexxx

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Jun 13, 2013
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Yeah i know it isn't. It was my first time, I was a bit nervous, and it took me late into the night when I was getting tired, etc. It was very easy for the most part. Those were the only 2 things I had an issue with.