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Radiator Whine?

U

USMCGrunt

2[H]4U
Joined
Mar 19, 2010
Messages
3,103
Noticed that my CPU loop has a wicked whine coming from the radiator. If I completely pinch one of the lines it dies down..is this actually pump noise coming through the radiator or can a radiator cause that? I've tried turned the pump all the way down and all the way up but it doesnt change it. It's louder than everythingelse in the room...quite annoying.
 
Might be air trapped in it... Noise comes from vibrations so can't think of anything else it might be, unless there is something closeby vibrating it (fan/pump). Try running just the pump with nothing else in the computer on to isolate the noise.

Whats the decoupling on the pump like? If the noise still happens with jump the pump running, take the pump out and completely isolate it from the chassis (hold it in your hand if you have to). If it is you need more decoupling, especially isolating it from the case.

If it is definately coming from the radiator, does it have a bleeding screw? Otherwise just move it around and turn it upside down/invert it lots and see if any air somes out.
 
DeathPrincess said:
Might be air trapped in it... Noise comes from vibrations so can't think of anything else it might be, unless there is something closeby vibrating it (fan/pump). Try running just the pump with nothing else in the computer on to isolate the noise.

Whats the decoupling on the pump like? If the noise still happens with jump the pump running, take the pump out and completely isolate it from the chassis (hold it in your hand if you have to). If it is you need more decoupling, especially isolating it from the case.

If it is definately coming from the radiator, does it have a bleeding screw? Otherwise just move it around and turn it upside down/invert it lots and see if any air somes out.
Click to expand...

I've messed with the pump to see if its possible pump vibration on the chassis and it doesnt seem to be...nothing seems to change the pitch or frequency that it makes with the exception of blocking its flow. Ill mess with the case to see if I can work an air bubble out but it didnt originally make this noise.
 
After some further investigation, ive discovered that the whine is actually coming from the CPU block. I flicked it a couple times and it stopped whining for a few seconds and then started up again.

I've rotated the case around to try and pull out any air bubbles that may be trapped but haven't gotten anything out....any ideas?
 
If it didn't happen before I'd just break your whole system down, clean it all up, and reassemble. CPU blocks get clogged up... The only way to tell what's going on in there is by taking a look.
 
Flick the fittings. If there's microbubbles inside it makes them form larger bubbles (might be hard to see in the milk as normally it forms a kind of white foam) which will pass out more easily. Lat the case on it's back when you do this (and make sure it's secure) so that the nozzles are pointing up, then move it around to see if anything comes out. Check for anything loose, like screws/washers/anything around the socket before you do obviously.

Does it sound like coil whine?
 
DeathPrincess said:
Does it sound like coil whine?
Click to expand...

Yes it does actually, but its definately not coming from the PSU. When I flick the fittings on teh CPU block it DOES stop making the noise for about a second or so but no bubbles. I've flipped this case all different directions to try and work any air out as well.
 
Maybe it's not from the CPU, but rather from the motherboard mosfets?
 
Tsumi said:
Maybe it's not from the CPU, but rather from the motherboard mosfets?
Click to expand...

Not that your wrong, but wouldnt that come and go based on the CPU's power load? Right now the cpu is consuming a lot less power as its only running at 1.5ghz or whatever it downclocks itself to when its not very active. I did however reinstall the ASUS AI Suite and tried changing the VRM settings to see if it had any effect...it did not. Next thing ill try is resetting everything in BIOS to default to see if there was a setting I changed when trying to overclock the CPU.

I emailed Swiftech about it yesterday so im just waiting on a reply from them for any suggestions.
 
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Coil whine is directly related to load on the mosfets and inductors. When your cpu is running at high usage, that's when you normally will hear coil whine. I wouldn't expect it on a P8P67 though.

Often, this is also related to your power supply. Coil whine can show up randomly due to capacitor aging in your PSU, causing the power to be less good and that causes harmonics...
 
This was originally an edit to my last post but I didnt want anyone to miss the action, lol.

Definately not motherboard causing the whine or anything else like that. I tried changing BIOS settings to default and that didnt fix it so, while the computer was sitting at desktop I unplugged the pump and the noise went away. It's either the pump itself making noise and its being transported and heard from the CPU block or its some sort of flow induced sound from fluid passing through the CPU block it seems.
 
What pump and cpu block are you using?

Do you gave a pump top?

I'd put my money on the pump rotor being off center.......you'd just have to remove the top and rinse it and replace.:D
 
ok, this is common pump whine. d5's are notorious for developing this high pitched whine after awhile. There's nothing you can do about it but slow your pump down, or buy a new pump.
 
magoo said:
What pump and cpu block are you using?

Do you gave a pump top?

I'd put my money on the pump rotor being off center.......you'd just have to remove the top and rinse it and replace.:D
Click to expand...
Check my signature. I actually didn't install the pumps on the res, it was done by FrozenCPU before being sent to me.

Zoson said:
ok, this is common pump whine. d5's are notorious for developing this high pitched whine after awhile. There's nothing you can do about it but slow your pump down, or buy a new pump.
Click to expand...

Define "after awhile" as this loop is....3 weeks old give or take. Also, pump speed does nothing to change the pitch or volume of the sound...its constant regardless of being on 1 or 5.
 
USMCGrunt said:
Check my signature. I actually didn't install the pumps on the res, it was done by FrozenCPU before being sent to me.



Define "after awhile" as this loop is....3 weeks old give or take. Also, pump speed does nothing to change the pitch or volume of the sound...its constant regardless of being on 1 or 5.
Click to expand...

It varies from pump to pump... Mine took about 6 months... I've heard of others that had problems from the get-go. Strange though... Usually lowering the speed helps. Mine becomes tolerable at 3. Although I just got a new MCP35x2 and will be swapping to that in two weekends.
 
I guess ill look into seeing if FrozenCPU will replace it cause its obnoxiously loud...drones out everything else...the intent here was to have a silent-ish PC...
 
I don't get any type of whine from my PC, and I'm running a D5 that's over 7 years old. If I get close to it and have the side panel off with all the fans shut down, then I can hear it.
 
I am somewhat amazed.....:eek:

I have a 4 year old 655 with a Bitspower front that I run full blast and also a 355 with an XSPC pumptop/Reservoir that I run almost 24/7 for the last two years and neither make any sounds except a very low hum....the 655 is a small bit more noticable than the 355, but neither are louder than the case fans, etc.
 
he's got very quiet case fans, so the loudest thing is the pump. his noise floor is lower than yours!
it's a persistent sound that carries, or if you're sitting right next to your rig in a less quiet room. gets annoying for sure. Which is exactly why i'm switching to dual mcp35x's with pwm.
 
Zoson said:
he's got very quiet case fans, so the loudest thing is the pump. his noise floor is lower than yours!
it's a persistent sound that carries, or if you're sitting right next to your rig in a less quiet room. gets annoying for sure. Which is exactly why i'm switching to dual mcp35x's with pwm.
Click to expand...

To be a little more clear though, its about the same volume as my 6970s when they were air cooled and the fans were running around 60% or so. My SPL meter I brought home from work measures about 55 dB about 2.5 ft from the case. Its definately NOT acceptable. If this is normal pump whine then imma have to get a different kind cause thats rediculous. When I disconnect the CPU pump, the other one is whisper quiet, I don't even hear it over the sound of the case fans.
 
Just thought I would let you guys know that I finally got around to draining my loop and rearranging the ordering of my system as recommended by tech support from Swiftech. The whine has reduced to such an extent that I can only hear it when I am right down next to the block and even then I have to be looking for the sound to actually hear it.

Swiftech's reasoning is that either pressure was too high and it was causing cavitation or that there was debris in the block causing the noise. When I emptied the loop out there were very fine particles that looked like shavings of pencil lead which could be shavings off the impeller of the pump FROM cavitation or maybe something left in the loop from the manufacture process. Either way, its much quieter now.
 
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