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How hot are YOUR mosfets?

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jlin453

Member
Joined
Sep 18, 2002
Location
Austin, Texas
My mosfets have tiny heatsinks on them (I think OCZ's). I stuck a temperature probe on the heatsink and it read 80C! lol. This hasn't really effected my overclock, but my vcore was a bit jumpy; from 1.88V to 1.92V and constantly jumping. I stuck two 40mm fans on them and now the vcore has stablized more to 1.9V. It occasionally goes up or down a little but at least it stays or goes back to 1.9V.

Lesson is, put some heatsinks on those suckers and ALSO a fan. Even if it doesn't help your OC, it'll be better for your motherboard (I'm sure). :)
 

v8vega350

Member
Joined
Nov 5, 2002
Location
washington
when i was running a bios vcore of 2.04 on one of my chips i cant remember witch my mosfets were measured with a compunurse were over 96c (meltdown) even with a cut up old hs on them after i stuck a fan over them they were just barly warm
 

Kaso

Member
Joined
May 5, 2004
Location
England, Yorkshire
They were getting to 85 the other night, but i've jammed a 80mm fan running at 5v in there and dropped down to ~55, 44 if i run the fan at 12v but i like silence
 
OP
jlin453

jlin453

Member
Joined
Sep 18, 2002
Location
Austin, Texas
Bogie said:
Do you have any pics of how you put a fan there, i just put a hs on my sb. But i would like to add a fan there.

I don't know how you'd be able to fit a fan on your SB, it's a tight fit since the video card is right there. Here's a picture of mine. Sorry if it's a bit blurry, hand was shaky with the camera in an awkward position
P1010015.JPG




And this is how I "mounted" my two fans over my mosfets. Yes, it's ghetto but it'll do for now ;)
p1010014.JPG
 

Runner30

Member
Joined
Apr 3, 2004
Mine aren't that hot without any cooling at all.
I can "put my finger on it" for any period of time, it won't burn.
Actually my SB is a LOT hotter.
 

dreammmatt

Member
Joined
Dec 28, 2002
Well, I've got a 120mm blowhole that kinda bathes everything in a nice cool stream (it actually dropped cpu temps by a few degrees, and i'm watercooled, lol, guess waterblocks can still transfer heat to air like a regular heatsink ^_^) - but that doesnt seem to be able to cool down my unsinked mosfets enough, as my vCore seems to undervolt 'a bit' - once i sink them tho, with that fan, it should be 1337 ^_^
 
OP
jlin453

jlin453

Member
Joined
Sep 18, 2002
Location
Austin, Texas
dreammmatt said:
Well, I've got a 120mm blowhole that kinda bathes everything in a nice cool stream (it actually dropped cpu temps by a few degrees, and i'm watercooled, lol, guess waterblocks can still transfer heat to air like a regular heatsink ^_^) - but that doesnt seem to be able to cool down my unsinked mosfets enough, as my vCore seems to undervolt 'a bit' - once i sink them tho, with that fan, it should be 1337 ^_^

Even with mosfet cooling, it's still going to undervolt a bit. No worries, just set your bios vcore a little higher and monitor your actual vcore through mbm or something :)
 

Docta_Z

Member
Joined
Aug 6, 2002
Location
Canada
I'd stick heatsinks on em if I had heatsinks to stick on...

I'm gunna sink my southbridge though...

get's hot with onboard sound/lan running full out for a while.
 

Sentential

Contributing Member
Joined
Sep 16, 2003
Location
Knoxville, TN
Mine are damn hot. Even with the abundant cooling I have. I also have my SB active cooled. Its a tight fit, but I can manage.

126.jpg


Even with my large MOFSET coolers, the sinks are atleast 60c* at the tips:eek:

118.jpg
 

NoxxB

New Member
Joined
Feb 24, 2004
Mosfets are watercooled, 29c idle and they going up to 35 under load :beer:
Cheers

NoxxB
 

HousERaT

Senior Air Extraordinaire
Joined
Apr 9, 2004
Location
Imladris
"How hot are YOUR mosfets?"

I wonder if I can get away with using that as a cheap pickup line?

Mine are heatsinked with a 80mm fan blowing right at them.