mosfet cooling

xxvv

xxvv

xxvv

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7 Mar 2009
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52
my motherboard - gigabyte g31-es2l

bd52675.jpg


appears to lack on the cooling front, i have replaced the rather stubby northbridge heatsink with a nice zalman model.

there appears to be no mosfet cooling feature, which can get pretty hot when overclocking my e5200, i don't really have any idea what i need, i presume something like this but which 1? -

http://www.thermalright.com/new_a_page/product_page/product_mosfet_cooler.html

http://www.enzotechnology.com/mos-c1.htm#

would it also be wise to change the southbridge heatsink?

:)
 
It doesn't look like the board was designed for mosfet cooling in mind since those third party coolers replace the stock coolers. This board hasn't got any stock coolers and looks like they aren't any mounting holes for them to be fitted.
 
If you need to, use the Enzotech ones - thermal tape is inc. and you only need 10 (one pack)
As there are individual units - that makes them universal :D
(unlike the Thermalright ones, which will not fit without some modification)
 
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On a related note, I don't think much of the MOSFET coolers on my P5Q. See piccy:
l_00610262.jpg


Is it safe to remove the horrid thermal pads and stick some AS5 on there? Or should I get the nice shiny Thermaltake ones and use them instead? They are secured by sprung pushpins, for what it's worth

I've already put AS5 on the NB and SB.

Opinions anyone?
 
i don't necessarily need mosfet cooling, but i'll be upping the volts and don't want to rise the temp too much in my matx rig. just installed a makeshift fan to drag some heat away from the northbridge but still can't break the 30c mark...
 
I also have that board - but the MosFet are frequently at different levels so the tape is better that TIM unless using indervidual enzo's ones.

Have a copper heatpipe jobby on mine (off another asus board) as a temp upgrade prior to installing waterblock.
That said it's totally overkill and only due to a fanless setup.
 
shadowscotland said:
I also have that board - but the MosFet are frequently at different levels so the tape is better that TIM unless using indervidual enzo's ones.

Have a copper heatpipe jobby on mine (off another asus board) as a temp upgrade prior to installing waterblock.
That said it's totally overkill and only due to a fanless setup.
Click to expand...

what do you mean - unless using individual enzo?

use tim instead of the supplied 3m thermal tape?

mos-c1_photo2.jpg


what would i expect from this maybe a 1-2c drop?
 
Sorry xxvv - was replying to SteveRaith :o
He has a P5Q, as I do - and the MosFet are grouped differently to your Gigabyte.

And that pic is perfect, just what you should do if your mosfet are above 80-90c

If your mobo is upright in a tower case - just TIM isn't enought to keep them stuck - you could use epoxy TIM - but thats limits there reuse.

nothing wrong with a NB at 30c btw - would work at twice that

@SteveRaith - might be worth you starting your own thread.
 
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siumatfung said:
only use non elector conductive thermal paste on mosfets not AS5!
Click to expand...
Heard this as well about mosfets, and NB/SB chipsets, when i done the mosfets and chips on my 680i i was advised to use arctic ceramique or mx2, as opposed to as5 due to it being elecrically conductive.
 
Only use non-conductive stuff myself too - but very very easy to use too much on mosfet and cover the contacts.
On most boards they are not level anyway so pad need to even out differances and make sure all are directly cooled.

That's why if aircooling the enzo's are so good - not only forged copper but perfect fit :D

Off AS5 own site:
Not Electrically Conductive:
Arctic Silver 5 was formulated to conduct heat, not electricity.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 5 should be kept away from electrical traces, pins, and leads. While it is not electrically conductive, the compound is very slightly capacitive and could potentially cause problems if it bridges two close-proximity electrical paths.)
Click to expand...
 
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Cheers ShadowScotland, I'll have a shufty at that, but then without having a way to measure the MOSFET temps I can't be sure.

What does everyone else use? IR thermometer? Or do your mobos has MOSFET temp readers built in?

[I could start that point as a seperate thread, but I think it's relevant to the existing content, ja? :) ]
 
to conclude do you think i should buy the enzotech singular mosfet heatsinks and will it make a difference?
 
if that are getting way to hot yes it will make a differance - if they are 60c or under then very little (other than looking nice)
There not silly money anyway - got a second hand pack for under a £5 the other day.
 
i don't really need them but just something to take away a bit of heat from the mobo which isn't built for overclocking.. cheapest i can get is 9.95 delivered so not too bad.
 
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