NB - High temp 81c

kohut124

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Nov 19, 2014
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Hi, my NB(northbridge?) is running at a solid 80-81c with no load on an Asus Rampage 3 Extreme.

I was reading some info about it and is it possible to replace the heatsink or somehow reduce this temp via different heatsink?

I can try and replace the thermal paste but I've never actually even heard of needing to cool a NB.

I also overclocked my CPU, could this be the reason why its running so hot? Heres some pictures and setup/oc settings.

Also any recommendations on what would fit for cooling?

https://valid.x86.fr/2y7fje

ccVWsqr.png
 
Solution
Airflow inside a case is a little different than a breeze. With case airflow it's more a volume of air moving heat out, it's not really a fast process, as much as a continuous movement. Sorta like the air moving around in a room, you don't really see/feel it unless you stand directly under the fan. And that's what you need with an aio, is that direct breeze from the fan. Indirect case airflow isn't much help.

As to the NB heatsink, it's a rather old board, comparatively, so it's possible the thermal pad under the heatsink has deteriorated with use and heat, so replacing it isn't going to hurt. You'll have to see exactly what's there, sometimes it's a thicker pad, sometimes just thermal tape and in rare occasions thermal glue. It's also...

CaptainCretin

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Jul 18, 2016
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Overclocking, especially if you are raising the voltages WILL cause the NB to overheat.

The heatsinks on them arent really the best (on most boards anyway), so the only options are to dial back the overclock and voltages, or improve airflow and heat dissipation.

What I did in a similar situation was to cover the NB heatsink with ribbed copper RAM heatsinks (to increase the surface area), and then fitted a small fan to blow directly over them.
Ideally, I wanted to stick a water jacket on it, but there was only a tiny gap between the top of the heatsink and the bottom of my gfx card (bad design).
 

Karadjgne

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I'm guessing Op has liquid cooling, probably a Corsair H-60 and cpu-opt is running the pump.

If that's the case, then supplying a breeze over the motherboard is best bet, either stick a fan on the hdd cage facing the rear exhaust or a fan on the side intake if there is one. That's one of the downfalls of AIO's, no bleed air covering VRM's or other voltage regulatory circuitry such as the Northbridge chipset. Yes the Northbridge chipset has a heatsink, most times it's not paste, but a thermal sticky pad holding the heatsink in place. The Northbridge controls pcie for the most part, so if you've oc'd the cpu using software like Asus Suite, then it's more than likely bumped BCLK, which on Ivy-Bridge or prior affected everything including pcie.

84°C isn't all that bad, well at idle it's not great, but what you'll need to check is the NB under heavy stress loads. NB of 90 isn't uncommon.

First try getting a breeze over that heatsink. See what that does for temps.
 

kohut124

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Nov 19, 2014
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Thanks for all the responses! I actually should have great airflow since I use a Cooler Master HAF 932 Advanced Blue Edition.

While playing PUBG the NB is currently 86 so I guess that's not bad..?

@scout Also, the fans aren't generally in the right spots besides the CPU since the cables won't reach within my case.

@CaptainCretin - Are all NB heatsinks the same size for screws and what not? Also, I'm assuming my GPU could be causing the heat issue considering its right next to it.

@Karadjne - You're on point with the cooler! I actually already have a side fan so maybe I'll have to crank the speed up? any recommendations for a replacement on the sticky thermal paste pad? Its still factory since I got it so maybe changing it would reduce the temps..?
 

Karadjgne

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Airflow inside a case is a little different than a breeze. With case airflow it's more a volume of air moving heat out, it's not really a fast process, as much as a continuous movement. Sorta like the air moving around in a room, you don't really see/feel it unless you stand directly under the fan. And that's what you need with an aio, is that direct breeze from the fan. Indirect case airflow isn't much help.

As to the NB heatsink, it's a rather old board, comparatively, so it's possible the thermal pad under the heatsink has deteriorated with use and heat, so replacing it isn't going to hurt. You'll have to see exactly what's there, sometimes it's a thicker pad, sometimes just thermal tape and in rare occasions thermal glue. It's also possible to replace the heatsink for something a little beefier, longer tines, copper vrs aluminum etc.
 
Solution

kohut124

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Nov 19, 2014
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I found a few different heatsinks but im not sure if they are all compatible. Also is there anyone loop systems to cool a chipset meaning the NB and 2 other components(not sure what they are but all the water blocks i've seen cover 3 sections)

Are all NB heatsinks compatible or is it 50/50 chance or I just have to find ones that fit the board?

 

Karadjgne

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So basically, you'll measure the distance between the screws, to see if it's 53mm, 59mm or 67mm. Then choose the type you want from the Enzotechnology website, and when ordering, order the size that fits. The Enzo includes some AS5 thermal paste, so that'd cover that aspect. Really the best deal. The type of heatsink will be determined by how much room you have, as noted sometimes the gpu can be an issue.
 

kohut124

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Nov 19, 2014
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Thank you for all the support! I thought that would be all but I was reading forums and is it best off to just attempt to use a spot fan? I was also lookng at cooling the TIM but I can't seen to find any solution.. or maybe use a liquid cooling loop?

Basically.. TL;DR

Whats the best cooling option?
1. Spot fan
2. Change Heatsink
3. Spot+Heatsink
4. Change TIM with AIO cooling?
5. AIO on NB
 

Karadjgne

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Forget about aio cooling or liquid cooling, unless you already have a custom loop setup.

Thermal padte/pad might help if the old is shot, otherwise it's a lateral move for the most part.

Upgraded heatsink at a minimum. This'll necessitate new paste/pad, so bonus there as you'll not have to diagnose/wonder/waste time or money on that decision.

Anything with a spot fan is going to be more effective than passive cooling, unless you really go overboard on the passive cooler and it's getting a good breeze from a case fan. It'd be like a smaller version of a cpu cooler, same theory as well.
 

kohut124

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Nov 19, 2014
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Looks like I'll just have to go with a new heatsink + split fan wires. (possibly new screws are needed? or included with the new heatsink?)

While I was at it thinking about my options and airflow I was wondering if everyone has this airflow issue with the GPU blowing hot air down at the PSU?
Yq8QFmG.png


The NB was running at 80 today so I think it also has to do with the current temp inside the room. regardless I keep my pc on 24/7 and it has been for the last 8 years so a new heatsink is needed then.


 

Karadjgne

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Gpus don't work like that. The fans are intakes, they blow their exhaust through the heatsink on the gpu, and it exits out directly towards the side panel where natural thermal characteristics make that heat actually rise, helped by any air that's curling off the back panel from the front intakes.

Your psu fan is also an intake, so if it's top mount fan, it'll draw case air and exhaust out the back. If it's bottom mount fan, it intakes fresh air and exhausts out ghe back.