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Aquarium computer temp trouble

post #1 of 7
Thread Starter 
Hey guys, new here. I'm having some trouble with my aquarium computer and I'm not sure what the culprit is. I'm running an MSI 790FX-GD70 motherboard and the northbridge temperature sensor is showing 80°C immediately after startup.

Some background: About 9 weeks ago, the clip holding the cpu heatsink on broke and allowed the heatsink to come loose. The thermal compound came off the core and was floating around in the oil. It has since settled to the bottom and I did not see it floating around while the computer was running today. I replaced the broken clip today (time and money were issues) and put the cpu heatsink back on and started it up to make sure everything was working as it should. I start up SpeedFan and it says the NB temperature is about 84°C. The DrMOS was running at about 45°C 9 weeks ago and this is the first time it's been on since then.

Could the termal paste be causing bad readings on that temperature sensor or could I have damaged the temp sensor while replacing the clip. Does anyone know the physical location of the sensor so I can take a look at it?
Mr. Bubbles
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Mr. Bubbles
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post #2 of 7
It may be a broken temp sensor or you didnt put the heatsync back on right.

Does the temp ever change at all? if it dosent even change then its probably a broken temp sensor.
    
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post #3 of 7
Thread Starter 
I haven't had the computer on for more than 5 minutes because I already had a previous calamity involving 4 gallons of 77°C mineral oil pouring through a crack in the tank and all over my hands and the carpet.

Also, I never removed the NB heatsink. Only thing I changed was the clip for the cpu heatsink. I did accidentally scrape 2 of the screws along the back of the motherboard during the install of the new clip. Could that have affected it?

EDIT: Just checked and the temperature fluctuates between 83 and 88°C.
Edited by tippy25 - 5/25/11 at 7:01pm
Mr. Bubbles
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Mr. Bubbles
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Hard DriveOptical DriveCoolingOS
2x WD Caviar Black 1TB LG Blu-Ray burner Koolance CPU-370 & VID-AR687, Phobya 4x120mm rad Windows 7 Pro 
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post #4 of 7
maybe the 2 screws... run it for a bit while watching it to make sure nothing happens i guess. Im thinking maybe you messsed up a temperature sensor.
    
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Hard DriveHard DriveCoolingCooling
(3x) Crucial 256GB (768gb RAID0) WD 3TB EK Supremacy EVO + D5 Vario GT-AP15 
CoolingMonitorMonitorKeyboard
2X HWLABS GTX360 (2x) 1440p QHD PLS MicroBoard 40" 4k MVA Corsair K70 RGB 
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(3x) Crucial 256GB (768gb RAID0) WD 3TB EK Supremacy EVO + D5 Vario GT-AP15 
CoolingMonitorMonitorKeyboard
2X HWLABS GTX360 (2x) 1440p QHD PLS MicroBoard 40" 4k MVA Corsair K70 RGB 
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post #5 of 7
this may be way off base, but how about some of the oil getting between the cpu and heatsink acting like an insulator? esp after some tim came off?
post #6 of 7
Thread Starter 
I think iCrap is right. I think it's a messed up sensor. It's reading consistently between 83 and 91°C, and the core which is literally 2 inches away is sitting steady at 40°C.

Hard Line, I pulled the motherboard tray out of the oil several days ago and let the excess drip back into the tank before I got to work on it today. I switched the bracket for the cpu cooler with the processor out of the socket and the processor and socket were separated. I cleaned both the processor and heatsink with Arctic Silver's thermal material remover and surface purifier, and laid down a nice new coat of Arctic Silver 5 on the processor before putting it back in the socket and securing the heatsink. Only then did I put it all back in the oil. I appreciate your help, but I made sure to take precautions so that didn't happen.

It shows up as "Remote 1" in SpeedFan, and before the clip broke, it was very close to whatever is reported as "Temp1", usually within 1 or 2 degrees. Looking at it, it looks to be off almost exactly by a factor of 2. This, in addition to the stability of the other system temperatures, leads me to believe that it is in fact a messed up sensor. I'm going to adjust my temperature warning events to compensate for it.
Mr. Bubbles
(15 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 955 BE 3.2GHz Gigabyte 990FXA-UD5 Sapphire Radeon HD6870 8GB G.Skill DDR3 1333 (PC3 10666) 
Hard DriveOptical DriveCoolingOS
2x WD Caviar Black 1TB LG Blu-Ray burner Koolance CPU-370 & VID-AR687, Phobya 4x120mm rad Windows 7 Pro 
MonitorKeyboardPowerCase
19" Acer X193W+BD Generic Logitech Corsair HX-750 Lian-Li Lancool PC-K62 
MouseAudio
Logitech MX Revolution Corsair SP2500 2.1 speakers 
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Mr. Bubbles
(15 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 955 BE 3.2GHz Gigabyte 990FXA-UD5 Sapphire Radeon HD6870 8GB G.Skill DDR3 1333 (PC3 10666) 
Hard DriveOptical DriveCoolingOS
2x WD Caviar Black 1TB LG Blu-Ray burner Koolance CPU-370 & VID-AR687, Phobya 4x120mm rad Windows 7 Pro 
MonitorKeyboardPowerCase
19" Acer X193W+BD Generic Logitech Corsair HX-750 Lian-Li Lancool PC-K62 
MouseAudio
Logitech MX Revolution Corsair SP2500 2.1 speakers 
  hide details  
Reply
post #7 of 7
Quote:
Originally Posted by tippy25 View Post
I think iCrap is right. I think it's a messed up sensor. It's reading consistently between 83 and 91°C, and the core which is literally 2 inches away is sitting steady at 40°C.

Hard Line, I pulled the motherboard tray out of the oil several days ago and let the excess drip back into the tank before I got to work on it today. I switched the bracket for the cpu cooler with the processor out of the socket and the processor and socket were separated. I cleaned both the processor and heatsink with Arctic Silver's thermal material remover and surface purifier, and laid down a nice new coat of Arctic Silver 5 on the processor before putting it back in the socket and securing the heatsink. Only then did I put it all back in the oil. I appreciate your help, but I made sure to take precautions so that didn't happen.
No problem, I wasn't aware all that had been done. in that case I would say a bad temp sensor
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