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After installing H50, loud whining p/p fans noise & higher-than-expected temps?

post #1 of 20
Thread Starter 
After an extremely frustrating install that was full of questions and head-scratches, I have finally set up my first aftermarket cooling system: the Corsair H50 (at least, I think so!). However, there are two things that I believe are not normal or maybe what I think is definitely not right. I have been analyzing what may be the fault or solution:

1) There is a loud whining/blowing/idling fan noise that is coming from the 2 GT AP-15 push-pull fans. See link here: youtube.com/watch?v=t3Y2X5llvy8

I originally set my fan+radiator assembly as an intake that looks something like this:

*Rear of case*Fan>>H50Radiator>>Fan*Front of case*

However, there is a loud sound in which I am not sure why the fans are making the sound. It almost sounds like some sort of pressure going on. I have double checked the direction of the fans, and indeed the fans look and seem like they're blowing air INTO the case (hence, intake). Although when I place my hands on the back of the fans, I can feel some slight air blowing too. Actually, when I put my hands behind the back of the supposed direction of ANY case fans, it seems I can feel some air as well. I guess this is just normal--nevertheless, I am 100% sure the p/p fans are in the right direction.

What I think may be wrong:

1a) AP-15 fans malfunctioning? (though I highly doubt this)
1b) Radiator malfunctioning?
1c) Perhaps I need some kind of shroom/grommet or some vibration-control or some washers in between the fans/radiator? Or something wrong with my screw placements? I've used 8 screws in all of same size and same washer size (as recommended by the Corsair YT & How-To vids). They're screwed in very tightly, too! However, I have heard many similar setups with my case/fan/H50/other hardware combinations without any problems. :-(

2) The other thing I noticed is when I booted up my system, the temps look a little off with the H50. After just viewing what my idle is in the MB & in Windows, they seem to be somewhere around 30-35 degrees at stock 2.8 GHz. I expected to be better. My ambient room temperature is cool. I understand that stock temperatures do not mean anything, but I was hoping something in the range of 22-28 at stock, given I am using the already-applied Shin-Etsu TIM paste that comes with H50 over my previous stock HSF/stock paste. I have not tested the CPU at a true load, but it seems to be jumping around 40-45 at 15%+ load when I tested it briefly in Windows via the Core Temp program. Fans and pump are installed correctly and it seems they're running at full speed.

What I may think could be attributing to this (if this is indeed not normal):


2a) I mentioned previously in my other posts that there were imperfections on my TIM paste when I bought the H50 pump. I was re-assured that this would be okay. It looked like there was some unevenness on the outer edges. No biggie. Unfortunately, I was also having a difficult time installing the Prior to getting the pump onto the bracket, I had smeared some of the TIM paste onto the outer edge of the CPU. I had attempted at least 10 times before I could push the actual pump and lock it into its bracket. However, I had smeared some already on the CPU. Please see pics here: http://img38.imageshack.us/img38/1663/pumpp.jpg (pump) & http://img829.imageshack.us/img829/4831/cpuil.jpg (cpu)

This is what it looked like. A well 30+ minutes after this happened, I finally got the pump into its place. I may or may not have smeared more as I locked it into place. Do you think I should clean/reset the pump/CPU with my own thermal paste? (I only got some MX-2 at this moment). Or do you think it would have been okay? I guess I was concerned for either air bubbles or just imperfections in the paste creating a terrible contact (although it was on the OUTER edge), etc.

2b) Browsing through the Corsair forums, the other thing I could think of was either a defective H50 pump

2c) Or maybe I am not locking the pump/bracket into place enough, or the screws were too tight. Or something similar.

2d) I also DID NOT use the ADHESIVE PADS. Maybe is it possible the adhesive gives more space for the screws to work? (someone said it may act like a washer mod?) Thus, the bracket/pump did not situate itself correctly?

Any suggestions? Thank you all for your help!
Edited by Kabigon - 6/8/11 at 4:21am
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post #2 of 20
Ok, going to start off and prob edit to fill rest in.

1
Fans have air flow on both sides, you of course have to suck air in to blow it out so you get a negative pressure on the back side of a fan which you will be able to feel.

Normally you feel it at about 5cm (estimate) from the back of the fan, of course that will depend on the strength of the fan.

2
That does seem a bit warm for stock but you do really need to look at the load temps to get the most accurate results. set it running prime95 or intel burn test for an hour or so and see what happens imo.

That may also help the TIM to "wear in". This is just a guess, but the corsair TIM probably does have a wear in time of 50-200 hours. You could always try a reseat with some different TIM (there are a million and one threads about people arguing which TIM is best, frankly most is good so I wouldn't worry too much). That will allow you to use less TIM and probably get better results.

2b
Maybe, but you aren't getting terrible temps, with a faulty pump I'd expect thermal shutdown kind of temps.

2c
Again maybe, I tend to go to thumb tight (where I can), but you don't need it too tight, maybe give it a little tweak, but don't tighten it to the point where you might break something (obviously)
Edited by Crabid - 6/3/11 at 6:26am
    
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post #3 of 20
Thread Starter 

Thanks for the reply. Sorry, I am replying a bit late as I have been quite busy.

Anyhow, I have uploaded a short video of what the fans sound like:

With pump plugged:


Without pump:
I hope this helps in diagnosing what I may have. I apologize if the video is too dark or unclear--I can always reshoot or make a new video. I'm still not sure why the sound sounds like a "whirlwind" or sounds like some kind of pressure blowing. It's pretty loud as apparent from the video.

I still have not messed with the temps yet. I am really wanting to figure out WHY I have this SOUND/FAN problem with the two push pull AP-15 fans. After that has been figured out, I will then test the temps and see if my pump is faulty or needs to be reseated. Any suggestions?
Edited by Kabigon - 6/8/11 at 3:29am
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post #4 of 20
Sounds more like the pump to me. The newer versions of the GT do whine a lot more than the older ones and I can hear that in the video
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post #5 of 20
the whine is the fan. the soft rattling noise is the pump.

if u could try adjusting the volts on the fans. rear 100% power, front 60-70% power.(should reduce the whine?)

also if there is any washers on the board, remove it.
Edited by digitally - 6/8/11 at 2:04am
post #6 of 20
Thread Starter 
For sure, I know it's not the pump because when I unplug the pump, the sound is still there! I'll have another video showing the difference between pump & no pump. There are no washers on the motherboard. There are only some washers I used to install the two fans since those came with the Corsair H50 (long screws + washers).

In the motherboard, it shows one fan running around 1780 rpm and the other fan around 1750 rpm. I believe the AP-15s are rated at a max of 1850 rpm... would the difference in two rpms or speed be a cause for that whining sound?
Edited by Kabigon - 6/8/11 at 3:15am
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post #7 of 20
No, they whine anyway, the new ones worse than the old. It still sounds like the pump however are the fans loose?
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post #8 of 20
Thread Starter 
I checked both the two fans. They are really tight. I also put up another video without the pump being plugged in (see link above again). Same sound, too. :/

The only thing I different was the pump had sort of a water-trickle-clicking-rattle noise which is BARELY audible.
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post #9 of 20
The 'rattling' sound isn't there on the second vid. Try turning each fan off in turn to see what difference it makes.

Good videos for explaining it by the way.
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post #10 of 20
I just read your comments about your idle temps. They don't really mean anything. As an example mine are around 9ºC above ambient with the fans full and around 11ºC with them slow. I wouldn't expect them to be much different on air or with a H50.

Can you give it a try with Prime95 and tell us what temps you get. Bear in mind the H50 is equivalent to a high end air cooler so you're not going to get fantastic temps.
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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... 
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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... 
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