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Loud MCP 350 pump question

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#1
I'm just about finished with my leak test. Everything turned out fine, except my pump is loud as hell. It makes a terrible high pitch whining, like a flourecent light on steriods. Could it be the way I mounted it? It's a Corsair mcp355. I didn't have the pad for the bottom, so I just used some epoxy to mount the bracket solid. Doesn't sound like vibrations, however, just a high pitch whine.

I tried unscrewing it and just holding it in my hand, not much of a difference. Perhaps 355's just eminate an unpleasant sound.
 
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#2
How exactly does your loop work? From what I see, the pump pumps the water in the res... that shouldn't be. Or if that pumps outlet is the top one, maybe it struggles with the water flow. Sounds unlikely, but it is a bit of a strange loop. Could also be my brain not fully awake yet tho.

But my Swiftech pumps do emit a nasty noise when there isn't enough water coming in.
 
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#3
The loop is pump>rad>block>res. Just seem to layout well that way, and I figured the cpu would get water straight from the radiator, which I assumed would be when it was coolest. Also, I thought that the res before the pump would always assure that airless water would be available to the pump.
 
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Location
Switzerland, Heart of Europe
System Name Fractality 1.0
Processor Intel Core i7-860 @ 3.6GHz
Motherboard EVGA P55 SLI
Cooling Prolimatech Megahalems and four Fractal Design 120mm fans, sleeved
Memory 16GB Kingston Hyper RAM
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Case Fractal Design Define R2, sleeved all I/O cables
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Power Supply Corsair HX750W modular, sadly only stock sleeving
Software Win 7 64bit
#4
The loop is pump>rad>block>res. Just seem to layout well that way, and I figured the cpu would get water straight from the radiator, which I assumed would be when it was coolest. Also, I thought that the res before the pump would always assure that airless water would be available to the pump.
Yes res before pump is a good idea. I'm thinking the pump has a hard time then pushing the water straight upwards and through the radiator. Just my thoughts tho, could be something completely esle, but I usually try to avoid straight vertical routes, unless the water flows down.
 
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#5
Thanks.

I tried to model my loop after this one by exodusprime1377, featured on page 351 of your pc ATM.
 

Wile E

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#6
My 350's don't make any high-pitched noises. I've had 4 of them.
 
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System Name Abacus
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#7
Now that I have my crap together, it's actually a Corsair MCP655-B.
 

Wile E

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Processor 980X @ 4Ghz
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Memory 3x2GB Mushkin Redlines 1600Mhz 6-8-6-24 1T
Video Card(s) Evga GTX 580
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Display(s) HP LP2475w 24" 1920x1200 IPS
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Audio Device(s) Auzentech X-Fi Forte into Onkyo SR606 and Polk TSi200's + RM6750
Power Supply ENERMAX Galaxy EVO EGX1250EWT 1250W
Software Win7 Ultimate N x64, OSX 10.8.4
#8
Oh, a 655. Can't help you there. Never had a D5/655 family pump, always DDC with aftermarket tops for me.
 
Joined
Aug 2, 2009
Messages
4,014 (1.30/day)
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System Name Abacus
Processor i5 2500K
Motherboard ASRock p67 Extreme4 Gen3
Cooling Swiftech MCP35X, EK HF Copper, 2.120 rad, 3.120 rad
Memory 2x4GB G.Skill Sniper 1600
Video Card(s) 2 Zotac GTX 770 4GB w/ FC EK Blocks
Storage WD 640BG x2/WD 250GB/Samsung 2TB
Display(s) QNIX 27" PLS
Case Corsair 700D
Audio Device(s) X-Fi XtremeGamer
Power Supply EVGA G2 750W
Mouse Logitech G500
Keyboard Corsair K70 RGB MX Brown
Software Windows 10
#9
Last edited:
Joined
May 31, 2008
Messages
5,787 (1.64/day)
Likes
855
Location
Switzerland, Heart of Europe
System Name Fractality 1.0
Processor Intel Core i7-860 @ 3.6GHz
Motherboard EVGA P55 SLI
Cooling Prolimatech Megahalems and four Fractal Design 120mm fans, sleeved
Memory 16GB Kingston Hyper RAM
Video Card(s) PNY GeForce 580 XLR8
Storage 64GB and 180GB SSDs / 1TB and 2TB HDDs
Display(s) 24" Acer V243W
Case Fractal Design Define R2, sleeved all I/O cables
Audio Device(s) onboard
Power Supply Corsair HX750W modular, sadly only stock sleeving
Software Win 7 64bit
#10
HOLY HELL :eek: That is one obnoxious pump. Hm just did some researching. How long have you been bleeding your loop? Some sources say that there are tiny tiny air bubbles in the pump, which makes it whine like that. Let the loop bleed, rock the case a bit, then it should be good.

Or, and hopefully thats not the case with your pump, the motor is crippled.