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Phase installation, northbridge temps skyrocket

post #1 of 10
Thread Starter 
Hello all,

Much like the title says, I recently received this beautiful beast of a phase unit made by Sdumper. I'll start by saying the phase unit itself runs gorgeously, sitting at -50c/-51c at idle, and dropping to -47c/-48c at 100% load.

I've run into a huge problem however and having asked a few people, and combing the web with every google search I could think of, I can't seem to figure out what's causing this, so hoping some of you brilliant individuals could shed some light on it.

Ever since installing the phase unit, my northbridge temps have skyrocketed, hitting 65c+ by the time windows finishes booting to the desktop, and it keeps rising through the 70's, 80's, and even caused the comp to auto-shutdown last night from going past 90's.

Originally I thought it was because I was using a heated backplate (heating pad between the insulation/backplate and the back of the mobo) I was told that the heating pad should be pinned as close to center of where the cpu socket is, with the insulation and backplate on top of it, to counter the condensation.

I figured there was a chance that the heating pad slipped or something, so as suggested by Sdumper, I unplugged the heating pad to test this and sure enough the temperatures didn't go down at all.

I also figured it may have been caused by the backplate being crushed between the back of the mobo and actual mobo tray it was mounted to. There wasn't enough clearance on the mobo tray so the backplate was being crushed pretty hard against the mobo. I modified the mobo tray to make the opening larger, and remounted the backplate etc. Still no luck.

Lastly, I took off the Northbridge HS, completely cleaned off the thermal paste with thermal paste remover, then washed it down with thermal surface purifier, and reseated the NB again. This seemed to drop temps by maybe 3 degrees at most, still not a big help when talking about going over 90's at idle.

Has anyone run into this before? or have any clue what could be causing the temps to skyrocket so high? The NB is cold to the touch which is confusing, and made me consider that the sensors were going bad. But if the sensors went berserk, why will it stay below 70c if I keep the air conditioner right next to it, and why would the sensor suddenly have issues after installing the phase when it was working just fine before.

Does insulation on the back / front of the mobo effect the NB if none of the insulation is actually touching the NB?

Lastly, for the record, I've quadruple-checked my voltages over and over, voltages are set @ stock, so its not a matter of having too much juice pumped to it.

I'm using an Asus Rampage III extreme, which I also thought was strange since one of the selling points of this mobo it's made to cater to extreme OC'ing via methods like LN2 etc.

If anyone can offer input, it'd be greatly appreciated. Also, if you've managed to read through all this, you get cookies.

thanks.
post #2 of 10
Have you tried having a fan blow directly on the northbridge heatsink? You mist have less air flowing over it now with the phase change installed.
 
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post #3 of 10
Could it be a lack of airflow as opposed to when you had an air cooler I presume?

If it's accurate and is over 60C it should be warm to the touch so could be a bad mount.
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post #4 of 10
Thread Starter 
Thanks for the responses,

Actually the airflow hasn't been restricted at all. The phase and insulation are both up above it and to the left, where as the fan pulls in air from the right side, so the phase and insulation have literally had no impact on the front of the mobo.

The NB temps were fine before installing this so I don't think it's a bad mount.. Though do you think the insulation on the back side of the mobo could cause it?

**edit, I say this because the previous HS i was using was the Corsair H50, and the mount for it was much smaller and allowed more airflow on the back of the mobo, where as this backplate is significantly larger, and has insulation.
Edited by Darknlight_8 - 4/22/11 at 3:48pm
post #5 of 10
It sounds like youve warped the motherboard slightly when you installed the phase unit - Which would explain the cold-to-the-touch NB heatsink. Try taking off the mounting clips and just holding it there with your finger.
    
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post #6 of 10
Quote:
Originally Posted by Darknlight_8 View Post
The NB temps were fine before installing this so I don't think it's a bad mount..
Unless you moved / knocked it during the installation?

As el gappo said, if the sensor is right then the heat sink should be at least warm to the touch. It is worth taking it off, re-applying some TIM and re-seating it. At the very least it will eliminate a possible cause.
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post #7 of 10
Did you use all the motherboard mounting screws when you installed it to the mobo tray?
    
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post #8 of 10
Thread Starter 
Wow thanks so much for the feedback. I misunderstood at first what was being referred to (i thought you meant the NB Heatsink itself, not the actual northbridge mount).

I've never taken off the NB mount all together before, but yes it is *very* possible that this is the problem, since the mobo was very likely bending a bit due to the mobo tray hitting the backplate.

I'll try and reseat it and let you guys know how it goes.

again, thanks *so* much - I realize it may be a simple suggestion, but it's a suggestion I didn't receive anywhere else lol.

I'm just so glad I don't have to go getting out the dremel kit again.

**EDIT

Actually before I jump into this, does anyone have any pointers?
Edited by Darknlight_8 - 4/22/11 at 7:31pm
post #9 of 10
Thread Starter 
Just finished reseating with a fresh application of TIM, still no luck, temps still hit 80c by the time I made it to the desktop.

*sigh* RMA time maybe?
post #10 of 10
I dont think its time to RMA the board. Try this first. I know I told you to make sure the hold down was tightened as tight as you can but too tight can cause the board to warp too. Do not tighten any tighter than you would an air cooler or water cooler.

Also I would try posting this in general overclocking areas because not many people read the phase section and this is not a cold issue its something different.
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