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insane northbridge temps. Desperately need help

post #1 of 9
Thread Starter 
1st, I hope this is the right section of forum to post this. If not, my sincere applogies. A quick run down to save everyone's time. My previous case was a chenbro gaming bomb. The northbridge temp was getting up to 75 degrees celius idle, granted it is the middle of summer. I replaced the case with a coolermaster HAF 932. Dropped the NB temp to 60 degrees . Call me stupid, I wanted to drop the NB temps a bit more. So I did some indepth reading & read I could remove the NB & mosfet heat sinks & put in some thermal pads, which I did. Put it all back together, started windows up & within 5 minutes the NB temp was climbing up over 80 degrees at idle. I have removed the thermal pad off the NB & put some thermal paste in place of the pad, but left the new thermal pad on the mosfet. Still temps are climbing over 80 degrees at idle. I would greatly appreciate some input from anyone, especially anyone who has the same board as me, (Asus Rampage II Gene) if anyone can suggest what I may do to fix this horrific problem, or what heat sinks I can replace the originals with, or with what after market cooling. I appreciate any help in advance Aussie
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60 gig corsair Force 3 GT SSD . 1 WD 2TB 3 Pioneer DVD-RW 219, 1 LG BluRay RW Corsair H80 win7 64bit 
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post #2 of 9
Probably there was thermal pad there because there is a gap between the hs and the nb, with only the paste there it doesn't make proper contact, try cleaning it and put back pads on it and see what happens.
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post #3 of 9
Northbridges usually have foam pads(not thermal pads; they don't touch the chip itself, just the area around it) on them to even out the mounting, did you remove those? Have you tried holding a fan over the northbridge to see if temps drop?
Edited by qwertymac93 - 2/11/12 at 4:26am
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post #4 of 9
Thread Starter 
@ Aximous & qwertymac93 There was no foam pad. There already was a thermal pad on the mosfet heat sink unit, which I peeled off, cleaned & replaced with a new thermal pad. between the heatsink & NB it had yellow thermal paste under the heat sink, which was like to concrete to remove. It took quite a while to remove, I replaced this with a thermal pad. The NB temps went through the roof. I replaced the thermal pad with thermal paste, temps still went through the roof. I believe qwertymac93 may have given me the answer. I placed a very small square of thermal pad on the actual NB chip on the board. I am now suspecting that this may be the reason. I will now remove the small piece of the NB chip & see if this fixes the temps. I shall post my answer if it works or not. greatly appreciate the replies
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60 gig corsair Force 3 GT SSD . 1 WD 2TB 3 Pioneer DVD-RW 219, 1 LG BluRay RW Corsair H80 win7 64bit 
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My System
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CPUMotherboardGraphicsRAM
i7 2700K @ 4.6GHz Asus Maximus IV GENE-Z/Gen3 9800GT 16GB Dominator GT CMT16GX3M4X2133C9 
Hard DriveOptical DriveCoolingOS
60 gig corsair Force 3 GT SSD . 1 WD 2TB 3 Pioneer DVD-RW 219, 1 LG BluRay RW Corsair H80 win7 64bit 
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24" AOC Logitech corsair HX750 coolermaster HAF 932 
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post #5 of 9
On my old mobo we used a trick to improve cooling and it was to put washers under the screws on the backside of the mobo to increase pressure on certain locations, maybe you could give this a try also.
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unRaid pfSense Ubuntu CX430v2 
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CM Elite 331 TP-Link TG-3269 Sil3512 Sata controller 
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Optical DriveCoolingOSMonitor
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CM Elite 331 TP-Link TG-3269 Sil3512 Sata controller 
CPUMotherboardRAMHard Drive
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Optical DriveCoolingOSMonitor
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post #6 of 9
point a fan @ it?

450
 
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Thuban Powah!
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post #7 of 9
The best heatsink efficiency is from the thinnest TIM material possible. TIM is only intended to fill the micropores in the metal surfaces, i.e. fine scratches, pits or tiny low spots. You want it so thin that it's almost translucent.

Unless the OE heatsink has come loose I would not have removed it to add pads. More often than not people use way too much TIM. All TIM is a thermal INSULATOR compared to metal-to-metal contact of the heatsink and heat source. Northbridge temps run fairly warm in normal operation. I would recommend going back to the original arrangement with the thinnest qty. of TIM if possible.
post #8 of 9
Thread Starter 
as promised I am here to give you all a heads up on the progress.
After a few attempts at thermal pads, & thermal paste, which none seemed to work, I have had success. I replaced the thermal pad on the mosfet chip, & applied some thin TIM on the NB chip itself. Then removed the heatsink off the NB unit & applied some thin TIM. Put it all back together with an antec spot cool 100.

Now the NB temps are stable 52 degrees C

CPU 38
MB 34
SB 41
NB 52

all stable temps
next plan is to do a bit of research & stress test it & see how the temps hold up. If temps stay ok & no hardware issues show up, I will overclock it.

Many thanks to everyone who shared their input smile.gif its greatly appreciated
My System
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CPUMotherboardGraphicsRAM
i7 2700K @ 4.6GHz Asus Maximus IV GENE-Z/Gen3 9800GT 16GB Dominator GT CMT16GX3M4X2133C9 
Hard DriveOptical DriveCoolingOS
60 gig corsair Force 3 GT SSD . 1 WD 2TB 3 Pioneer DVD-RW 219, 1 LG BluRay RW Corsair H80 win7 64bit 
MonitorKeyboardPowerCase
24" AOC Logitech corsair HX750 coolermaster HAF 932 
MouseAudio
logitec logitec 5.1 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 2700K @ 4.6GHz Asus Maximus IV GENE-Z/Gen3 9800GT 16GB Dominator GT CMT16GX3M4X2133C9 
Hard DriveOptical DriveCoolingOS
60 gig corsair Force 3 GT SSD . 1 WD 2TB 3 Pioneer DVD-RW 219, 1 LG BluRay RW Corsair H80 win7 64bit 
MonitorKeyboardPowerCase
24" AOC Logitech corsair HX750 coolermaster HAF 932 
MouseAudio
logitec logitec 5.1 
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post #9 of 9
^^^^ Glad that you are making some progress. thumb.gif
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