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MCP355 With EK res top noise - Page 2

post #11 of 14
Thread Starter 
The sound is unfortunately not from the vibrations of the pump. It is a very high pitched electrical hum/buzz. Unfortunately at the moment I don't have time to really thoroughly check it out and as it has been going solidly for over 6 months I feel that it is very unlikely to be a leak. I will completely disassemble it if I find the time. I think for the moment I will just leave it as is and monitor the pump. I have a spare around here somewhere so if it does break it's not a very big deal anyway. And honestly, I'm hesitant to dissect it because I know if I find any signs of water damage or anything I'm not going to be comfortable until its replaced completely, so for now I think I'd rather remain oblivious and if it breaks, replace it then.

I just thought someone else might have had a similar noise. Really, it just sounds like noise from the electrics anyway and I think it might always have been there but I'm not sure. I guess what I really want to know is could having the pump fail damage anything? I know the CPU will be fine, its not overclocked or anything ATM and I know intel thermal shutdown hardware is good. But would it damage the PSU or anything? I wouldnt have thought it would since its not possible to short across multiple rails or anything.
My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
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Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
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Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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post #12 of 14
Being that it sounds power related, my next question is have you added or changed anything that is serviced from the 5v/3v supply?

The other item is that the xspc topper directly returns the fluid above and into the volute, this acts much like a turbo charger (using exhaust to rotate a turbine to induct more air) where as in this case, using return fluid energy to affect the rotation of the sphere in the pump. This is akin to having this pump in serial with another, albeit a far weaker pump and in turn causes the pump sphere to slightly rotate out of sync with the original pump design. Due to it being slightly out of sync it could be that the pump is cutting the magnetic field ahead or behind the expected point of rotation that the field was intended to be cut. This could induce a reactance in the circuit creating additional heat due to the current needing to be overcome to create the new field.

I use this pump and top myself and added additional heatsinks around the pump to compensate for additional heat, but of course, that does nothing for the fact that it is still making heat and operating outside of the original design characteristics.

The reason to check the pump for black marks is to confirm if it is arcing from the windings that create the magnetic field, to hear it, something other than the copper is being vibrated, ie. the air. That arc is energy achieving a ground.

To confirm that it is the pump itself and not something else providing an erroneous voltage you could always put just the pump on the psu by itself, and power it up checking if it is still making the noise, if the voltage is fluctuating it could cause this noise as well. Ie. the pump is discharging from the flux in the voltage, ie. resistance is staying more or less the same, so V +- = A +-, V=R(A). Not sure about your power supply and or if its 5v rails / plugs come off the same service or not... worth checking, and you wouldn't need to get wet to do it.

As far as temp protection, I use core temp with the temp protection enabled, which in my case is set to shut down my system if it break 56c, well before the 70c that the chip is (965 be) is designed for. I highly recommend it for any system that could be temp sensitive if there were a failure.
Edited by Soggysilicon - 3/26/11 at 8:56am
 
Yukikaze
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 1800X Asus C6 Hero AMD / ATI Reference AC VEGA 64cu - EK-FC-WB G.Skill DDR4 3200 2x8 Single Samsung B.Dies 
Hard DriveCoolingCoolingOS
Samsung EVO 960 NVME 250G Water Air Winblows 10c 
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Samsung CF791 34" 3440x1440 x100hz 48-100hz Fre... Logitech G15 TPX-775M NZXT Phantom "Original" 
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G700 Generic Black Neoprene Supreme FX S1220 Onboard Aerocool Touch 2100 
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Revoltec CCFL 30cm Twin UV Rev 2 Revoltec CCFL 30cm Twin UV Rev 1 
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Phenom II X4 965 be MSI NF980-G65 MSI R9 280X (2x) G.Skill F3-12800CL9D-4GBRL 
Hard DriveOptical DriveCoolingOS
SSD DVD-RW 24x Custom water Windows 7 (build 7600) 64bit 
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B2230 Logitech G15 w/ LCD TPX-775M NZXT Phantom White 
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Yukikaze
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 1800X Asus C6 Hero AMD / ATI Reference AC VEGA 64cu - EK-FC-WB G.Skill DDR4 3200 2x8 Single Samsung B.Dies 
Hard DriveCoolingCoolingOS
Samsung EVO 960 NVME 250G Water Air Winblows 10c 
MonitorKeyboardPowerCase
Samsung CF791 34" 3440x1440 x100hz 48-100hz Fre... Logitech G15 TPX-775M NZXT Phantom "Original" 
MouseMouse PadAudioOther
G700 Generic Black Neoprene Supreme FX S1220 Onboard Aerocool Touch 2100 
OtherOther
Revoltec CCFL 30cm Twin UV Rev 2 Revoltec CCFL 30cm Twin UV Rev 1 
CPUMotherboardGraphicsRAM
Phenom II X4 965 be MSI NF980-G65 MSI R9 280X (2x) G.Skill F3-12800CL9D-4GBRL 
Hard DriveOptical DriveCoolingOS
SSD DVD-RW 24x Custom water Windows 7 (build 7600) 64bit 
MonitorKeyboardPowerCase
B2230 Logitech G15 w/ LCD TPX-775M NZXT Phantom White 
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post #13 of 14
Thread Starter 
I haven't changed anything on any of the rails since building the rig 6 months ago and the pump is well cooled as it is sitting over the top of the exhaust fan from the bottom section of my case, it is never even warm to the touch. I understand that checking for black marks would help diagnose the problem but at the end of the day I would still have the problem and I would end up having to replace the pump because I wouldn't be able to have it installed knowing that it was in that condition. As for emergency shutdown, I am using Speedfan to monitor the speed of the pump and if it drops below 4400rpm it will shut my computer down, so I don't think the failure will be able to cause any damage if it does fail.

Also, with regards to the 5v rails, they are taken from voltage regulators that draw their power from the 12v rail. As I understand it this particular unit is supposed to be an extremely solid PSU so I doubt that it is the cause of the issue.

As I said, however, I think I will just wait and see what happens, I am doubtful that it will fail and if it does I shall just get a replacement pump, possibly one of the swiftech PWM ones so I can run it at a lower RPM. But from the sound of it, its a very common sound that I have heard from video cards, motherboards, PSUs and many other things over the years.

If it is failing then I would replace it after dissecting it anyway so really if it is on its way out then for me its either now or later so I may as well just wait. I also have to opinion of my dad who is an electrical engineer, so has obviously worked with many similar things over the years, and he seems to think it's nothing to worry about so I don't think I'll do anything until it does go, especially since, as I said,, if there were any signs of damage AT ALL I wouldnt be able to bring myself to put it back in and would need to replace it anyway, just for peace of mind.
My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
KeyboardPowerCase
Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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My System
(21 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4790K 4.8GHz @ 1.306v (Actual) ASUS Maximus VII Gene Gigabyte GTX 780 Galaxy GTX 780 
RAMHard DriveHard DriveCooling
16GB G.Skill Ares (4x4GB @ 1866MHz OC'd to 2133) Samsung 840 Evo 500GB WD Black 2.5" 750GB EK Supremacy EVO Acetal 
CoolingCoolingCoolingCooling
Aquacool NeXXos UT60 240mm Radiator EK XE 360 Radiator x 2 EK-FC780 GTX Ti Acetal /w Backplate and Reinfor... 8 x EK Vardar F4 
CoolingOSMonitorMonitor
EK MOSFET ASUS M7G Acetal Nickel Windows 8 x64 Pro Dell U2711 (2560*1440) Dell P2715q 
KeyboardPowerCase
Ducky Shine 3 Year of the Snake Edition Corsair AX1200 Thermaltake Cube X2 
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post #14 of 14
Quote:
Originally Posted by DirektEffekt View Post
I haven't changed anything on any of the rails since building the rig 6 months ago and the pump is well cooled as it is sitting over the top of the exhaust fan from the bottom section of my case, it is never even warm to the touch. I understand that checking for black marks would help diagnose the problem but at the end of the day I would still have the problem and I would end up having to replace the pump because I wouldn't be able to have it installed knowing that it was in that condition. As for emergency shutdown, I am using Speedfan to monitor the speed of the pump and if it drops below 4400rpm it will shut my computer down, so I don't think the failure will be able to cause any damage if it does fail.

Also, with regards to the 5v rails, they are taken from voltage regulators that draw their power from the 12v rail. As I understand it this particular unit is supposed to be an extremely solid PSU so I doubt that it is the cause of the issue.

As I said, however, I think I will just wait and see what happens, I am doubtful that it will fail and if it does I shall just get a replacement pump, possibly one of the swiftech PWM ones so I can run it at a lower RPM. But from the sound of it, its a very common sound that I have heard from video cards, motherboards, PSUs and many other things over the years.

If it is failing then I would replace it after dissecting it anyway so really if it is on its way out then for me its either now or later so I may as well just wait. I also have to opinion of my dad who is an electrical engineer, so has obviously worked with many similar things over the years, and he seems to think it's nothing to worry about so I don't think I'll do anything until it does go, especially since, as I said,, if there were any signs of damage AT ALL I wouldnt be able to bring myself to put it back in and would need to replace it anyway, just for peace of mind.
Sounds like a plan, and odd noises are sorta common with electrical gear anyways. I had a PSU for years that made all kinds of discharge racket... and still use a UPS that will "sizzle" from time to time. So long as you have temp protection I don't see much in the way of a safety issue, baring any leaks, which I am sure you have looked for!

As far as the whine, the same thing happens on a great deal many fans when they are put on a variable resistor or speed controller, get the hissing noise from the fan motor... which is why I tossed that out there. Some do it, some don't (at least that you can hear)... as good as this stuff has gotten, there is still some questionable "build spec" in the PC industry hehe. Went back and checked my pump and it runs at 4550~4560, so your right on target with your numbers there too... that said, anyones guess how precise/accurate those rpm sense headers are. +-10% maybe and still pass QA?
 
Yukikaze
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 1800X Asus C6 Hero AMD / ATI Reference AC VEGA 64cu - EK-FC-WB G.Skill DDR4 3200 2x8 Single Samsung B.Dies 
Hard DriveCoolingCoolingOS
Samsung EVO 960 NVME 250G Water Air Winblows 10c 
MonitorKeyboardPowerCase
Samsung CF791 34" 3440x1440 x100hz 48-100hz Fre... Logitech G15 TPX-775M NZXT Phantom "Original" 
MouseMouse PadAudioOther
G700 Generic Black Neoprene Supreme FX S1220 Onboard Aerocool Touch 2100 
OtherOther
Revoltec CCFL 30cm Twin UV Rev 2 Revoltec CCFL 30cm Twin UV Rev 1 
CPUMotherboardGraphicsRAM
Phenom II X4 965 be MSI NF980-G65 MSI R9 280X (2x) G.Skill F3-12800CL9D-4GBRL 
Hard DriveOptical DriveCoolingOS
SSD DVD-RW 24x Custom water Windows 7 (build 7600) 64bit 
MonitorKeyboardPowerCase
B2230 Logitech G15 w/ LCD TPX-775M NZXT Phantom White 
MouseMouse PadAudioAudio
Logitech MX Revolution a black square SB X-Fi Titanium Sharkoon XTatic 
AudioOther
Logitech THX 5.1 Original G15 / Logitech G700 
  hide details  
Reply
 
Yukikaze
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Ryzen 1800X Asus C6 Hero AMD / ATI Reference AC VEGA 64cu - EK-FC-WB G.Skill DDR4 3200 2x8 Single Samsung B.Dies 
Hard DriveCoolingCoolingOS
Samsung EVO 960 NVME 250G Water Air Winblows 10c 
MonitorKeyboardPowerCase
Samsung CF791 34" 3440x1440 x100hz 48-100hz Fre... Logitech G15 TPX-775M NZXT Phantom "Original" 
MouseMouse PadAudioOther
G700 Generic Black Neoprene Supreme FX S1220 Onboard Aerocool Touch 2100 
OtherOther
Revoltec CCFL 30cm Twin UV Rev 2 Revoltec CCFL 30cm Twin UV Rev 1 
CPUMotherboardGraphicsRAM
Phenom II X4 965 be MSI NF980-G65 MSI R9 280X (2x) G.Skill F3-12800CL9D-4GBRL 
Hard DriveOptical DriveCoolingOS
SSD DVD-RW 24x Custom water Windows 7 (build 7600) 64bit 
MonitorKeyboardPowerCase
B2230 Logitech G15 w/ LCD TPX-775M NZXT Phantom White 
MouseMouse PadAudioAudio
Logitech MX Revolution a black square SB X-Fi Titanium Sharkoon XTatic 
AudioOther
Logitech THX 5.1 Original G15 / Logitech G700 
  hide details  
Reply
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